Loading...
HomeMy WebLinkAboutAddendums to drawings/specs HAMMEL GREEN AND ABRAHAMSON, INC., ARCHITECTS AND ENGINEERS 1201 HARMON PLACE, MINNEAPOLIS, MINNESOTA 55403 ADDENDUM#1 First Addendum to drawings and specifications entitled: ORONO ICE ARENA(CP-2) ORONO MINNESOTA COMMISSION NUMBER: 1607.001 15 NOVEMBER 1996 The additions, revisions, omissions, corrections and clarifications contained herein shall be made to drawings and specifications for the project and shall be included in scope of work and bids to be submitted. References made below to specifications and drawings shall be used as a general guide only. Bidders and Contractors shall determine for themselves the work affected by Addendum items. SPECIFICATIONS-GENERAL CONSTRUCTION G1 - Sections Issued: (A)The follwoing sections are hereby issued as a part of this Addendum: 01400 - Special Structural Testing and Inspection 02200-Earthwork(issued with CP-1) 02220-Trenching and Backfilling(issued with CP-1) 02270-Precast Gravity Retaining Walls(issued with CP-1) 02500-Bituminous(issued with CP-1) 02515 - Sitework Concrete(issued with CP-1) 02600 -Water Systems(issued with CP-1) 02710-Underfloor Drainage(issued with CP-1) 02720- Sewerage(issued with CP-1) 02830- Chain Link Fence 02930 -Turf(issued with CP-1) 02931 -Pond Area Seed(issued with CP-1) 02950 -Planting(issued with CP-1) 03100 - Concrete Formwork 03200- Concrete Reinforcement 03250- Concrete Accessories 03300- Cast-in-Place Concrete 03412 -Precast Prestressed Concrete Decking 05120- Structural Steel 05210- Steel Joists 05312 - Steel Roof Decking END OF ADDENDUM#1 ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page - 1 • SECTION 01410 SPECIAL STRUCTURAL TESTING AND INSPECTION PART 1 GENERAL 1.1 INTENT AND CONDITIONS A. Intent 1. For compliance with the Minnesota State Building Code, the Owner will employ and pay for a special inspector(or inspectors)as required by Section 1701 of the Uniform Building Code. 2. Duties and responsibilities of the special inspector(s) shall be as outlined in Section 1701.3 of the Uniform Building Code and as herein specified. 3. Define and coordinate special structural testing and inspection services. 4. Testing and Inspection services are intended to assist in determining probable compliance of the work with requirements specified. These services do not relieve the Contractor of responsibility for compliance with the requirements of the Contract Documents. B. Conditions 1. Perform testing and inspection in accordance with industry standard used as reference for specific material or procedure unless other criteria are specified. In the absence of a referenced standard, accomplish tests in accordance with generally accepted industry standards. 2. Failure to detect defective work or materials shall in no way prevent later rejection if defective work or materials are discovered. 1.2 RELATED REQUIREMENTS A. Refer to individual technical specification sections for specific qualifications, inspections, tests, frequency and standards required. 1.3 DEFINITIONS A. Testing Evaluation of systems, primarily requiring physical manipulation and analysis of materials, in accordance with approved standards. B. Inspection Evaluation of systems, primarily requiring observation and judgement. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 01410 - 1 • C. Special Structural Testing and Inspection: Special Structural Testing and Inspection Services herein include items required by the 1994 UBC Section 1701 as adopted by the current Minnesota State Building Code, and other items which in the professional judgement of the Structural Engineer of Record, are critical to the integrity of the building structure. D. Structural Engineer of Record(SER): The Registered Engineer in responsible charge of the structural design for the project. E. Testing Agency(TA) 1. Testing Agency: Approved independent testing agency acceptable to the Owner, Architect, SER and as noted below: a. Authorized to operate in the State in which the project is located and experienced with the requirements and testing methods specified in the Contract Documents. b. Meeting applicable requirements of references stated in paragraph 1.4. c. Calibrate testing equipment at reasonable intervals by devices of accuracy traceable to either the National Bureau of Standards, or to accepted values of natural physical constants. F. Special Inspector(SI) 1. Special Inspector: Under the direct supervision of a registered civil/structural engineer, experienced with the type of work requiring special structural testing and inspection. G. The categories of special inspector are: 1. Special Inspector-Technical I, II and III: Usually an employee of a testing agency: a. Technical I(Section 03300)-ACI Certified Grade I inspector. Inspector shall be employed by a testing laboratory, under the direct supervision of a registered civil/structural engineer. b. Technical I(Section 05120)-Non-destructive Testing Technician S.N.T.-TC-1A Level I, and/or A.W.S. Certified Associate Weld Inspector(C.A.W.I.)with minimum of 10 years experience, or an A.S.N.T. Level III with minimum of 10 years experience. c. Technical II(Section 03300)-ACI Certified Grade II inspector. Inspector shall be employed by a testing laboratory,under the direct supervision of a registered civil/structural engineer. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 01410-2 d. Technical II(Section 05120)-Non-destructive Testing Technician A.S.N.T. TC- 1A Level II, (NDE Technician II), A.W.S./C.A.W.I., with minimum 3 years experience, or an AWS/C.W.I. e. Technical III(Section 05120)-A civil/structural engineer regularly engaged in this type of work,with a minimum of 4 years experience and registered in the state in which the project is located and is an employee of a qualified and approved testing laboratory. The registered engineer shall review and approve all reports. f. Technical III(Section 05100)-A.S.N.T. Level III with a minimum of 10 years experience or an A.W.S./C.W.I. with a minimum of 10 years experience. 2. Special Inspector- Structural I and II: Usually an employee of the Structural Engineer of Record. a. Structural I (Sections 330D, 05120)-Graduate civil/structural engineer, or other personnel acceptable to the SER,with experience in the design of structural systems of this type. Inspections shall be performed under the direct supervision of a registered civil/structural engineer. b. Structural II (Sections 330D, 05120)- Civil/structural engineer regularly engaged in the design of structural systems of this type, registered in the state in which the project is located. The registered engineer shall review and approve all inspection reports. H. Building Official: The Officer or his duly authorized representative charged with the administration and enforcement of the State Building Code. 1.4 REFERENCES A ANSI/ASTM E329- Standard practice for use in the evaluation of testing and inspection Agencies as used in construction. B. ASTM E543 -Practice for Determining the Qualifications of Non-destructive Testing Agencies. C. ASTM E548 -Practice for Preparation of Criteria for Use in the Evaluation of Testing Laboratories and Inspection Bodies. D. ASTM C1077 -Practice for Laboratories Testing Concrete and Concrete Aggregates for Use in Construction and Criteria for Laboratory. E. ASTM C 1093 -Practice for the Accreditation of Testing Agencies for Unit Masonry. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 01410 - 3 F. ANSI/ASTM D3740- Standard Recommended Practice for Evaluation of Agencies Engaged in the Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction. G. Minnesota State Building Code. H. ICBG Model Program for Special Inspection(excerpts). I. See technical specification sections for specific references. 1.5 RESPONSIBILITIES/AUTHORITY A. Special Structural Testing and Inspection 1. Special Inspector: a. Test and/or inspect the work assigned for conformance with the building department approved plans, specifications, and applicable material and workmanship provisions of the code. Perform testing and inspection in a timely manner to avoid delay of work. b. Bring nonconforming items to the immediate attention of the contractor for correction, then, if uncorrected after a reasonable period of time, to the attention of the Structural Engineer of Record,the Building Official, and to the Architect. c. Submit test and/or inspection reports to the Building Official, Contractor,the Structural Engineer of Record, and other designated persons in accordance with the Special Structural Testing and Inspection Schedule. d. Submit a final signed report stating whether the work requiring special inspection was, to the best of his/her knowledge, in conformance with the approved plans, specifications and the applicable workmanship provisions of the code. e. Sign the Special Structural Testing and Inspection Schedule in conjunction with other responsible parties prior to commencing construction. 2. Architect: • a. Coordinate the flow of reports and related information to expedite resolution of construction issues. b. Arrange and attend a pre-construction meeting to review scope of special structural testing and inspection. Include contractor, building official, SER, testing agency and other parties concerned. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 01410-4 c. Complete and sign the Special Structural Testing and Inspection Schedule in conjunction with other responsible parties prior to commencing construction. Provide a completed copy of the schedule to all signed parties including Building Official. 3. Structural Engineer of Record: a. Identify items requiring special structural testing and inspection including special cases. b. Define"type" of special inspector required for "description" of work indicated on the special structural testing and inspection schedule. c. Attend a pre-construction meeting to review scope of special structural testing and inspection. d. Complete and sign the Special Structural Testing and Inspection Schedule prior to commencing construction. e. Review reports issued by all special inspectors. f. If engaged as a special inspector, provide special structural testing and inspection services as noted in Article 1.5.A.1. 4. Testing Agency: a. When engaged as a special inspector, provide special structural testing and inspection services as noted in Item 1.5.A.1. b. Sign the Special Structural Testing and Inspection Schedule in conjunction with other responsible parties prior to commencing construction. c. Attend a pre-construction meeting to review scope of special structural testing and inspection. 5. Contractor: a. Attend a pre-construction meeting to review scope of special structural testing and inspection. b. Post or make available the Special Structural Testing and Inspection Schedule within project site office. Provide timely notification to those parties designated on the schedule so they may properly prepare for and schedule their work. c. Provide special inspector access to the approved plans and specifications at the project site. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 01410 - 5 r d. Review all reports issued by special inspectors. e. Retain at the project site all reports submitted by the special inspectors for review by the building official upon request. f. Correct in a timely manner, deficiencies identified in inspection and/or testing reports. g. Provide safe access to the work requiring inspection and/or testing. h. Provide labor and facilities to provide access to the work and to obtain, handle and deliver samples,to facilitate testing and inspection and for storage and curing of test samples. i. Sign the Special Structural Testing and Inspection Schedule in conjunction with other responsible parties prior to commencing construction. 6. Fabricator: a. Submit a Certificate of Compliance to the Building Official, Special Inspector, and Structural Engineer of Record stating the work was performed in accordance with the Contract Documents. b. Sign the Special Structural Testing and Inspection Schedule in conjunction with other responsible parties prior to commencing construction. 7. Building Official: a. Review all special inspector qualifications. b. Review all fabricators who perform work in their shop, which requires special inspection. c. Accept and sign completed Special Structural Testing and Inspection Schedule. d. Review reports and recommendations submitted by special inspector. e. Review the "final signed reports" submitted by special inspector. These documents must be accepted and approved by the building department prior to issuance of a Certificate of Occupancy. f. Determine work which, in the Building Officials opinion, involves unusual hazards or conditions(UBC 306(a) 14- Special Cases). ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 01410 - 6 8. Owner: a. Provide and pay cost of special structural testing and inspection services. b. Provide special inspector with Contract Documents and accepted shop drawings. c. Provide special inspectors and testing agencies with full access to the site at all times. d. Sign the Special Structural Testing and Inspection Schedule in conjunction with other responsible parties prior to commencing construction. B. Inspections by Building Official 1. Contractor shall provide timely notice for inspections performed by the building official, as required by UBC 306, the Minnesota State Building Code, and local ordinance. 1.6 INSPECTION NOTES A. Contractor: Provide minimum of 24 hours notice for all items requiring testing or inspection. Do not place items requiring testing and inspection services prior to or during placement until testing and inspection services are available. Do not enclose or obscure items requiring testing and inspection services after placement until testing and inspection services are performed. 1.7 REPORTS A. Testing agency and/or special inspectors shall submit a report in accordance with the Special Structural Testing and Inspection Schedule and shall conduct and interpret tests and inspections and state in each report whether; (1)test specimens and observations comply with Contract Documents, and specifically state any deviations, (2)record types and locations of defects found in work, (3)record work required and performed, to correct deficiencies. B. Submit reports for special structural testing and inspection, in timely manner to the Contractor, Building Official, SER, and Architect. 1. Submit reports for ongoing work, to provide the information noted below: a. Date issued b. Project title and number c. Firm name and address ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 01410- 7 1 d. Name and signature of tester or inspector e. Date and time of sampling f. Date of test or inspection g. Identification of product and specification section h. Location in project, including elevations, grid location and detail i. Type of test or inspections j. Results of tests or inspections and interpretation of same k. Observations regarding compliance with Contract Documents or deviations therefrom 2. Submit final signed report stating that, to the best of the special inspectors knowledge, the work requiring testing and/or inspection conformed to the Contract Documents. 1.8 FREQUENCY OF TESTING AND INSPECTION A. For detailed requirements see individual technical specification sections, and Part 2 of this section. 1.9 PROTECTION AND REPAIR A. Upon completion of testing, sample-taking, or inspection,the Contractor shall repair damaged work and restore substrates and finishes to eliminate deficiencies, including deficiencies in the visual qualities of exposed surfaces, as judged solely by the Architect/Engineer of Record. Protect work exposed by or for testing and/or inspection and protect repaired work. Repair and protection is the Contractor's responsibility, regardless of the assignment of responsibility for testing and/or inspection. 1.10 TESTS TO DEMONSTRATE QUALIFICATION A. If the Contractor proposes a product material, method, or other system that has not been pre-qualified, the Architect may require applicable tests, to establish a basis for acceptance or rejection. These tests will be paid for by the Contractor. B. The Architect reserves the right to require certification or other proof that the system proposed, is in compliance with any tests, criteria or standards called for. The certificate shall be signed by a representative of an independent testing agency. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 01410- 8 PART 2 SCOPE OF TESTING AND INSPECTION 2.1 SPECIAL STRUCTURAL TESTING AND INSPECTION REQUIREMENTS A. Item and Frequency(Section 03200-Concrete Reinforcement)(Qualifications in parentheses): 1. Inspect reinforcement in all cast in place concrete, excluding slabs on grade, footings without transverse reinforcement, and topping slabs. (Structural I) a. Verify reinforcing bar grade b. Verify reinforcing bars are free of dirt, excessive rust and damage c. Verify reinforcing bars are adequately tied, chaired and supported to prevent displacement during concrete placement d. Verify proper clear distances between bars and to surfaces of concrete e. Verify reinforcing bar size and placement f. Verify bar laps for proper length and stagger and bar bends for minimum diameter, slope and length. g. Verify mechanical splices are placed in accordance with the plans, specifications and reviewed shop drawings h. Verify epoxy coating is present at locations noted on the plans and specifications, include tie wires, chairs, bolsters, etc. Verify coating damage is repaired in accordance with the contract documents. B. Item and Frequency(Section 03300)- Cast-In-Place Concrete) (Qualifications in parentheses): 1. Sample and test all cast in place concrete. (Technical I) a. Prepare compression test specimens(ASTM C31), one set of four standard cylinders of concrete for each compressive strength test, mold and store cylinders for laboratory cured specimens. b. Perform compressive strength tests(ASTM C39). One set of four cylinders for each day's pour between one and 25 cubic yards. If a day's pour exceeds 25 cubic yards, one set of four cylinders for each additional 50 cubic yards, or fraction thereof. One specimen at seven days,two at 28 days and one specimen retained in reserve for later testing if required. For post tensioned concrete, make and test an additional cylinder at three days to verify strength prior to stressing. (When ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 01410 - 9 frequency of testing will provide less than five strength tests for a given class of concrete, conduct at least five strength tests from randomly selected batches. If fewer than five batches are used, conduct one test from each batch.) c. Slump(ASTM C143); one test at point of discharge for each set of compression test specimens; additional tests when concrete consistency appears to have changed. d. Air entrainment(ASTM 231);test the first batch of air entrained concrete and one additional test for each set of compression test specimens. e. Test concrete temperature hourly when air temperature is 40°F and below and when 80°F and above; and each time a set of compression test specimens is made. 2. Perform concrete mix verification. (Technical I) a. Verify mixer truck trip ticket conforms to approved mix design. b. Verify that total water added to mix on site does not exceed that allowed by concrete mix design. c. Verify that concrete quality is indicative of adequate mixing time, consistency and relevant time limits. C. Item and Frequency(Section 05120- Structural Steel, Section 05210- Steel Joists, Section 05312- Steel Roof Decking)(Qualifications in parentheses): 1. High Strength Bolting: a. Preparation: Visually inspect mating surfaces and bolt type for all slip-critical bolted connections for general conformance with the contract documents prior to bolting. (Technical II) b. Slip Critical Bolts and Tension Bolts: Test bolt tightening in 10%of all bolts. Test a minimum of two bolts in each connection. Verify that all plies of connected elements have been brought into contact, at 100% of connections. Verify all tips are removed from "twist"-off bolts. (Technical II) c. Bearing Bolts: Visually inspect to conform all plies of connected elements have been brought into contact, at 100%of connections. (Applies only to bolts designed for values not requiring exclusion of threads from failure plane, all other bolts require testing as for tension bolts.) (Technical II) d. Standard: Test High Strength bolted connections per R.C.S.C. "Specifications for Structural Joints Using ASTM A325 or A490 Bolts", and UBC Standard 27- 7. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 01410 - 10 e. Fabricator Certification: For shop fabricated work, perform tests required above, except that: 1) Bolt testing may be reduced or deleted, if fabrication shop satisfies AISC Quality Certification Program-Category I, or more stringent criteria, or is approved by building official and SER. 2. Welding(Field): a. Fillet Welds: Visually inspect 100%of all fillet welds,for size, length and quality, per AWS D1.1. (Technical II) b. Partial Penetration Welds: Test 100%of all partial penetration welds exceeding 5/16 inch, using Ultrasonic Testing per A.W.S. D1.1, Section 6. Test 25% of all partial penetration welds less than 5/16 inch,using Magnetic Particle Testing per ASTM E-109, performed on root pass and on finished weld. (Technical II) c. Full Penetration Welds: Test 100%of all full penetration welds exceeding 5/16 inch, using Ultrasonic Testing per A.W.S. D1.1 Section 6. Test 25%of all full penetration welds less than 5/16 inch, using Magnetic Particle Testing per ASTM E-109, performed on root pass and on finished weld. (Technical II) d. Steel Joist/Joist Girder Welds: Provide testing and inspection for field welds previously specified. See also Specification Section 05210. (See items as noted in items 2.a,b,c) e. Deck Welds: Visually inspect size, location, length and burn-thru for 100% of puddle welds on metal deck designed as a structural element, per AWS D1.3, Section 6. See also Specification Section 05312. (Technical I) f. Fabricator Certification: Perform tests as noted above for shop fabricated work also, except that: 1) Fillet weld and partial penetration weld testing may be reduced or deleted, if fabrication shop satisfies AISC Quality Certification Program-Category I, or more stringent criteria and is approved by building official and SER. (As noted in items 2.a,b,c) g. Procedures and Preparation (Technical II): - Verify qualifications of all welders as AWS certified. - Verify proposed welding procedures and materials. - Verify adequate preparation of faying surfaces. - Verify preheat and interpass temperatures of steel, proper technique and sequence of welding, and cleaning and number of passes are provided as required. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 01410 - 11 3. Structural Configuration: a. Submittals: Verify mill test reports and other submitted documentation, for compliance with contract documents. (Structural I) b. Materials: Verify materials delivered to site comply with contract documents and approved shop drawings(Technical I): Bolts Electrodes Mechanical Fasteners Deck Gauge • 4. Conventional Testing and Inspection Requirements: a. High Strength Bolting: 1) Bolt Material Test: Test a minimum of two bolts of each ASTM class specified, for bolt hardness and tensile properties. (SNT-TC-1A) 2) Fabrication and Erection Tolerances: Verify in-place structure satisfies specified tolerances. (Contractor) 5. If special inspection of fabricators work is required, testing agent may test and inspect structural steel at plant before shipment. Owner and SER reserve right to reject material not complying with Contract Documents at any time before final acceptance. 6. Definitions: a. A.S.N.T. -The American Society for Non-destructive Testing. b. N.D.E. -Non-destructive Evaluation. c. A.W.S./C.A.W.I. -American Welding Society/Certified Associate Weld Inspector. d. A.W.S./C.W.I. -American Welding Society/Certified Weld Inspector. D. The parties involved shall complete and sign the Special Structural Testing and Inspection Schedule. The completed schedule is an element of the construction documents and after permit issuance, becomes part of the building department approved plans and specifications. The completed schedule shall include the following: 1. A specific listing of the items requiring inspection and testing. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 01410 - 12 2. The associated specification section and article which defines the applicable standards by which to judge conformance with the approved plans and specifications in accordance with U.B.C., Section 306 as adopted by the Minnesota State Building Code. The specifications section should also include the degree or basis of inspection and testing;i.e., intermittent/will-call or full-time/continuous. 3. The frequency of reporting, i.e., intermittent, weekly, monthly, per floor, etc. 4. The parties responsible for performing the inspection and testing work. 5. The required acknowledgements by each designated party. E. See attached "Special Structural Testing and Inspection Schedule". END OF SECTION ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 01410- 13 Special Structural Testing and Inspection Schedule Project Name: ORONO ICE ARENA Project No. 1607-001-00 Location Orono.Minnesota Permit No. Special Structural Testing and Inspection Specification Type of Insspection Assigned Section Article Description(2) Inspector(3) Frequency Firm(4) 03200 Concrete Reinf. Structural I Periodic 03300 Cast-In-Place Conc. Technical I Periodic 05120 Structural Steel Technical I Periodic;once per week 05210 Steel Joists Technical II Periodic,once per week 05312 Steel Roof Decking Technical I Periodic,as required. Notes: This schedule to be filled out and included in the project specification. Information unavailable at that time,to be filled out when applying for a building permit. (1) Permit No.to be provided by the Building Official. (2) Use descriptions per U.B.C. Section 306,as adopted by Minnesota State Building Code. (3) Special Inspector-Technical,Special Inspector-Structural. (4) Firm contracted to perform services. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 01410 - 14 ACKNOWLEDGEMENTS Each appropriate representative shall sign below: Owner: Firm: Date: Contractor: Firm: Date: Architect: Firm: Date: SER Firm: Date: SI-S: Firm: Date: TA: Firm: Date: SI-T: Finn: Date: TA: Firm: Date: SI-T: Firm: Date: F: Firm: Date: F: Firm: Date: * The individual names of all prospective special inspectors and the work they intend to observe shall be identified. (Use reverse side of form if more room is needed.) Legend: SER=Structural Engineer of Record SI-T=Special Inspector-Technical TA=Testing Agency SI-S=Special Inspector-Structural F=Fabricator • Accepted for the Building Department By Date • ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 01410- 15 • SECTION 02200 EARTHWORK PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Protection of trees and wetland areas to remain. 2. Clearing and grubbing. 3. Stripping, stockpiling and subsequent distribution of topsoil. 4. Excavation, filling, grading and compaction. 5. Maintaining site excavations free of water. 6. Importing granular borrow for specified application. 7. Disposal off site of excess and unsuitable soil materials. 8. Testing as described herein. B. Related Sections: 1. Section 02220-Trenching and Backfilling. 2. Section 02500 -Bituminous Paving. 3. Section 02515 - Site Paving: Concrete. 4. Section 02665 -Water Systems. 5. Section 02710-Underfloor Drainage. 6. Section 02720- Sewerage. 7. Section 02930 -Turf 8. Section 02931 -Pond Area Seed. 9. Section 02950-Landscaping. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02200 - 1 1.2 QUALITY ASSURANCE A. Utilize equipment of proper size and in good working condition to prosecute the work to full completion in a satisfactory manner. B. Utilize experienced personnel familiar with the equipment, methods and procedures for the job. C. Testing Laboratory as retained by Owner, approved by A/E. D. Testing Laboratory shall perform the following operations: 1. Inspect and approve soil conditions at bottom of all excavations; determine limits of excavation where applicable. 2. Qualify on-site and borrow soils for suitability to project requirements. 3. Observe and approve contractors operations within context of soil limitations and project requirements. 4. Choose location and conduct soil density tests on fill and backfill materials when unit prices apply. 5. When applicable, determine quantities of excavation and/or fill for payment. E. Testing Laboratory shall advise A/E of any materials or operations that will not produce specified results. F. When directed by Testing Laboratory, Contractor shall provide fill material samples for testing. G. Costs of retesting and replacement of rejected fill material shall be at the Contractors expense. H. Testing Laboratory shall provide soil/test reports before placement of concrete foundations;test reports shall be available within 24 hours of testing to minimize delays. I. Testing Laboratory shall provide a written report of all operations observed including soils analysis and compaction reports, volumes of excavation/fill when required, and statement that work has been performed in accordance with specified requirements. 1.3 REFERENCES A. American Society for Testing and Materials: ASTM 1. ASTM D698, "Test Methods for Moisture-Density Relations of Soils." ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02200 - 2 • 2. ASTM D1556, "Test Method for Density of Soil In Place, Sand-Cone Method." 3. ASTM D2922, "Test Methods for Density of Soil In Place by Nuclear Methods." B. Mmn. Dept. of Transportation Standard Specifications for Construction, latest Edition: MnDOT Specification. C. Unified Soil Classification System: USCS 1.4 SUBMITTALS A. Submittals shall be made in accordance with the requirements of Division 1 and this Section. B. Testing Agency: 1. Test reports for suitability of in-place soil. 2. Test reports for suitability of fill and backfill material, including granular borrow. 3. Test reports for compaction of fill. 4. Record of measurements of quantities for payment, if applicable 5. Written Report that summarize field observations, method and operations, and includes test reports when applicable. If pumping provisions are required to keep excavations free of ground water, estimate pumping quantities and include this information in the report. 1.5 UNIT PRICES A. Unit cost per cubic yard (in-place volume)for additional soil excavation and off-site disposal when over-excavation of unsuitable material or soft clay is required below design subgrade elevation. B. Unit cost per cubic yard(in-place volume)for furnishing and placing compacted granular borrow fill when additional granular borrow fill is required to fill the void created by additional excavation below design subgrade elevation. 1.6 SOIL TERMS -FILL APPLICATIONS A. Structural Fill: Soil material placed below design footing elevation and forming a volume as defined by the underside the footing and then extending down and laterally at a 1:1 slope to the line of contact with competent native soil. B. Primary Support Material: Soil material placed beneath subgrade at pavement areas, i.e, beneath granular borrow subgrade improvement. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02200 - 3 C. Granular Cushion: Specific granular borrow soil material placed beneath slabs and other subcomponents within the building area. D. Foundation Backfill: Soil material placed against building footings and walls. E. Frost Protection Zone: The application of styrofoam insulation at walk and stoop areas adjacent to the building where frost action must be significantly limited. F. Low Permeability Soil: Specific cohesive soil material placed beneath topsoil where it desirable to limit infiltration of water into underlying soils. G. Geotextile: Permeable Fabric for use in separating granular borrow(subgrade • improvement)from subgrade soils at pavement areas. PART 2 PRODUCTS 2.1 MATERIALS A. Topsoil: The top layer of on site variable depth soil that is designated "A" or"B" horizon as defined by the Soil Science Society of America. All topsoil shall be free of rocks, cobbles and other foreign matter greater than 2" in any dimension. B. Organic Topsoil: Special topsoil for use as a medium for establishing and sustaining marsh vegetation at the perimeter and shallow water portion of the management/treatment pond and the wetland mitigation area. Organic topsoil shall meet the following requirements: Mmimum Maximum Material passing the 2.0 mm Sieve 85% Clay 5% 30% Silt 10% 60% Sand/Gravel 5% 50% Organic Matter 15% 25% pH 6.1 7.5 1. Texture of topsoil shall be classified according to the engineering definition of particle size. Texture shall be determined by the method described in AASHTO T-88. Soil pH and percent organic shall be determined by the current standard testing procedure of the University of Minnesota Soil Science Department. C. Unsuitable Material: All saturated and unsaturated mixtures of soil containing organic material such as humus, spongy matter, roots, stumps, muck, peat, and fatty clay, rubbish and other objectionable materials. This material shall be removed from the site D. Select Suitable Material: Non-expansive mineral soil free of significant rock quantities and having a plasticity index of 15 or less, and a liquid limit of 35 or less. Soil shall be free of any materials that may prevent attaining design densities and within 2%(plus or minus) of optimum moisture content. • ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02200 -4 1. Use for: a. Primary support material, beneath specific application thickness of granular borrow as required beneath building floors and pavement areas and as noted in paragraph E.1.b and c below. b. Foundation backfill. E. Granular Borrow: Clean granular soil material with no more than 5%by weight passing the No. 200 sieve and at least 90%passing the 1" sieve. Soils meeting Unified Soil Classification(USCC)categories SP, SW, GP or GW may qualify. 1. Use for: a. Structural Fill b. Subgrade improvement beneath exterior pavements. c. Granular Cushion beneath building floor slabs. d. Granular layer placed over styrofoam insulation. F. Siltation Fence: A synthetic filter fabric of propylene, nylon, polyester or ethylene yarn, uniform in texture and appearance, free from defects, flaws or tears that would affect its physical properties. The fabric shall meet or exceed the following requirements. PROPERTY TEST METHOD REQUIREMENT Grab Strength ASTM-D-1682 90 lbs. min. Elongation ASTM-D-1682 15%min. to 50% max. at 45 pounds Equiv. Opening Size CW02215 20 to 80 Sieve No. (Corps of Eng.) Ultraviolet Resistance ASTM-D-4355 70%min. Width N/A 36 in min. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02200- 5 G. Insulation Board: Extruded polystyrene insulation board, 3" thick and conforming to MnDOT Spec. Section 03760. H. Geotextile Fabric: Per MnDOT Specification Section 03733, Type V. PART 3 EXECUTION 3.1 INSPECTION AND LOCATION A. Examine site areas and conditions within the contract limits. Notify A/E in writing, of all conditions detrimental to proper and timely completion of Work. B. Proceed with Work only after unsatisfactory conditions have been remedied. Start of work indicates satisfaction with existing conditions and,therefore,the responsibility for proper results is a part of this section. C. Locate existing utilities: 1. Locate existing utility lines which may be disturbed by excavation operations. 2. Excavate if required to determine exact utility locations. 3. Review proposed Work with all utility companies. 4. When required, arrange for removing, relocating, or disconnecting and capping of utility lines. 5. If utilities are to remain in place,provide appropriate means of protection during earthwork operations. 6. Charges by utility companies for capping, disconnecting, removing, or relocating utility lines will be paid by the Owner. 7. Charges by utility companies for repairing utility lines damaged by earthwork operations shall be paid by the Contractor. 3.2 SPECIAL PRECAUTIONS • A. Buildings and Structures: Exercise extreme precautions when working adjacent to existing or new structures: Do not operate heavy equipment close to building walls without adequate bracing and support of foundations. Repair any damage as directed by Architect/Engineer. B. Protection: Provide the necessary slopes and/or provisions required to maintain grades outside the area of excavations for service lines, utilities, streets, drives, walks, etc., which may be subject to damage during the earthwork and construction operations. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02200-6 C. Water: Exercise particular effort to provide temporary grading to divert surface water from excavations. Provide and maintain pumps, well points, sumps, suction and discharge lines, and other dewatering systems necessary for the conveyance of water to approved run off'disposal provisions. D. Site Erosion Control: The following criteria shall apply to construction activities that result in run-off leaving the site: 1. Channelized runoff from adjacent areas passing through the site shall be diverted around disturbed areas, if practical. Otherwise, the channel shall be protected as described below. Diverted runoff shall be conveyed in a manner that will not erode the conveyance and receiving channels. 2. All activities on the site shall be conducted in a logical sequence to minimize the area of bare soil exposed at any one time. 3. Runoff from the entire disturbed area on the site shall be controlled by meeting one or more of the following: a. All disturbed ground left inactive for 14 or more days shall be stabilized by seeding and mulching, mulch covering or other equivalent control measure. b. Silt fences, straw bales, or equivalent control measure shall be placed along all sideslope and downslopes side of the site. If channel or area of concentrated runoff passes through the site, silt fences shall be placed along the channel edges to reduce sediment reaching channel. The use silt fences, straw bales, or equivalent control measures shall include maintenance and inspection. c. Siltation fence installation shall include anchoring the bottom edge as detailed on the grading plan. Posts shall be 2"x 2" pine or steel posts located 4" o.c. 4. Any soil or dirt storage piles containing more than ten cubic yards of material should not be located with a downslope drainage length of less than 25'from the toe of the pile to a roadway or drainage channel. If remaining for more than seven days, it shall be stabilized by mulching, vegetative cover, tarps or other means. Erosion from soil piles which will be in existence for less than seven days shall be controlled by placing straw bales or silt fence barriers around pile. All storm drains shall be protected with straw bales or other filtering barriers. E. Winter Construction: During cold weather, stripping, scarification, fill placement and compaction shall be performed as rapidly as possible to minimize potential problems associated with placement and compaction of frost susceptible soil. F. Tree Protection: Protect trees indicated to remain by the following methods: 1. Construct a box of 8'minimum height that encompasses the tree trunk. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02200 - 7 2. Place/construct barricades at a sufficient distance from tree to prevent limb damage. 3. Shore or sheet as necessary to protect trees near excavation. 4. Branch or root cutting, if required, shall be done with sharp tools, and cuts over 1/2" shall be painted with approved tree paint having an asphalt base. 5. Protect root zone within ten feet of tree trunk as follows: a. Prevent vehicular traffic/parking or storage of supplies. b. Prevent dumping of refuse or chemically injurious materials or liquids. c. Prevent puddling or continuous running water. G. Underground Features: Drawings indicate approximate locations of new and known existing underground utility and service lines. Exercise extreme care in excavating to prevent damage to existing underground features. Excavation within 6" of existing utilities • and foundations shall be done by hand. H. Carefully review soil boring logs. Review construction procedures with Soil Testing Laboratory and incorporate appropriate adjustments as necessary to protect site soil integrity. I. All excavation must comply with the reuirements of O.S.H.A. 29 CFR,Part 1926, Subpart P, "Excavations and Trenches." 3.3 PREPARATION A. Clearing of Site: 1. Remove completely all trees indicated for removal within the area of new construction. 2. All material cleared/removed shall become the property of the Contractor and shall be • removed from the site. B. Topsoil Stripping: 1. All topsoil in the areas of proposed building or pavement as shown on Drawings shall be stripped. The topsoil shall be stockpiled for later use where shown on Drawings or where designated by the General Contractor. a. Excess topsoil shall become the property of the Contractor and be disposed of off the limits of the site. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02200- 8 3.4 EXCAVATION A. General Excavation: 1. General excavation shall include all materials of every nature and description encountered in obtaining lines and grades shown on Drawings. It is assumed that the materials can be removed by power shovel, crawler tractor, scraper or other equipment normal to excavation work, but not requiring the use of drills or blasting. 2. All excavations shall be made to the proper depth with the proper allowance made for materials to follow. 3. All select suitable materials removed from the excavation shall be used as far as practicable in the context of allowable applications. 4. Contractor shall, at his own expense, form all dams, construct temporary ditches, pump or do whatever other work is necessary during the progress of the work to keep excavations area free of water at all times. 5. All unsuitable material encountered in excavation areas where some type of loading will be superimposed shall be removed. 6. If in the prosecution of the Work it is necessary to interrupt existing surface drainage, sewers, or underdrainage, the Contractor shall provide and maintain temporary drainage facilities until permanent facilities are completed. 7. Refer to this Specification for disposal of unsuitable materials and excess materials. 8. Contract amounts will not be adjusted for unauthorized over excavation. B. Building Area Excavation: 1. Excavate the building area to subgrade elevations as follows: Footings: See structural drawings. Rink Area Floor: 1001.5 Lower Floor: 1002.9 Upper Floor: 1005.6 Sloped Seating Area: As required to provide 12" granular cushion beneath underside of concrete. 2. Once design sub-grade elevation as been achieved,the testing laboratory shall observe and test the subgrade as to its competency. If additional subcut is required beneath footing elevation to remove soft or unstable soils as determined by the testing laboratory representative, said subcut shall include lateral oversizing at a 1:1 ratio; i.e. each additional foot of excavation depth shall include an equal lateral increase. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02200 - 9 3. Additional excavation beneath the elevations given above, and subsequent placement of granular borrow within the excavation void shall be subject to compensation per "Unit Prices". Volume of additional excavation shall be determined by the Testing Laboratory by in-place measurement. 4. If excavation bottom penetrates below design elevation without recommendation of testing laboratory representative, Contractor shall fill excavated area to design levels with compacted granular borrow as defined above. Associated costs shall be absorbed by Contractor. 5. Excavation shall permit placement and removal of forms where required. 6. Bottom of excavations shall not be disturbed once completed. If Contractors process results in disturbed soils as determined by the Testing Laboratory, the disturbed soils shall be removed and replaced with Granular borrow compacted to density as recommended by Testing Laboratory; associated costs shall be at Contractor's expense. 7. Contractor shall take appropriate measures to prevent slope failures at perimeter of excavations. C. Pavement Area Excavation: 1. Excavate proposed pavement areas to subgrade elevations as follows: Concrete Areas: 16" below proposed finish grade. Bituminous Areas: 36" below proposed finish grade. 2. Once excavation is complete to subgrade elevations as noted above, the exposed subgrade shall be inspected for evidence of highly organic material. If such material is evident at subgrade elevation, it shall be removed, and the resulting void filled with compacted select suitable material up to adjacent subgrade elevation, i.e., floor subgrade elevations per 3.4.8.1., or pavement area subgrade per 3.4.C.1. 3.5 FILL AREAS A. Fill Materials: 1. The fill materials shall consist of select suitable soils or granular borrow materials free from organic matter and other deleterious substances; specific application and materials shall be as noted under Part 2 above. Fill shall not contain stones or fragmentary rock measured in their greatest dimension larger than the following sizes: ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02200- 10 BELOW THE UPPER 24 INCHES UPPER 24 INCHES OF FILL(INCHES) OF FILL(INCHES) FILL LOCATION Under Building Areas: 3 3 Under Roads,Pavements and ParkingLots: 4 *6 Under Grassed Areas: 6 *6 *May be exceeded if approved by Architect/Engineer B. Building and Pavement Areas: 1. At those site areas where the existing grade is below design subgrade elevation(after topsoil has been removed),the areas shall be filled with compacted select suitable fill up to subgrade elevation. Subgrade elevation at building area per 3.4.B 1; subgrade elevation at pavement area per 3.4.C.1. 2. Once subgrade elevation has been satisfied, granular borrow shall be placed in a controlled fashion as described below. At parking lot areas, a geotextile fabric shall be placed over the subgrade prior to placement of granular borrow. Fabric placement shall include sewn seams meeting the strength requirements of MnDOT(Spec. Section 3733, table 3733-1. 3. The placement of granular borrow over a geotextile fabric shall occur in a manner that protects the fabric from direct wheel loads. This may be accomplished by dumping the granular borrow at the limit of the area so treated, and then spreading the granular borrow with a crawler tractor to an initial thickness of 12". Once this initial layer has been compacted to specified density the application of subsequent lifts of granular borrow can be performed in a more conventional fashion at the Contractor's discretion. 4. At pavement areas within 10 ft. of building perimeter, a 3" thick polystyrene insulation bond shall be incorporated into the granular borrow placement sequence. See detail drawings for specific placement details. C. Construction: 1. The applicable fill materials shall be placed in horizontal layers which, when loose, shall not exceed 8". Each layer shall be spread evenly and shall be thoroughly blade mixed during the spreading to obtain uniformity of material in each layer. Each layer shall be compacted to a density not less than the percentage of maximum dry density as specified herein. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02200 - 11 2. Fill section construction shall start at the lowest plane and progress upward. 3. When the fill material includes stones, no large stones shall be allowed to nest and all voids must be carefully filled with small stones or earth and properly compacted. 4. If necessary, the material shall be brought to the proper moisture content as determined by the Testing Laboratory by either aerating the material if it is too wet and if weather conditions permit, or spraying or sprinkling with water if it is too dry. Each lift shall be mixed thoroughly if drying or wetting is required to insure uniform distribution of the moisture. 5. Compaction of fill within 3 ft. of foundation walls shall be performed with manually operated vibrating place compactors to avoid damaging or displacing new walls. D. Seasonal Limits: 1. No frozen fill material shall be placed, spread or rolled in the embankment nor shall any fill material be placed on frozen ground or during unfavorable weather conditions. When the work is interrupted by unfavorable weather conditions, fill operations shall not be resumed until the Testing Laboratory indicates that the moisture content and density of the previously placed fill are as specified. 3.6 EARTHWORK TOLERANCE A. Grade and Alignment Tolerances: 1. Contractor shall check the work during the grading process with devices satisfactory to the A/E. The completed subgrade shall conform to Drawings with the following tolerances: HORIZONTAL VERTICAL MEASURE+ MEASURE+ Cut and Fill Slopes(General Grading): 1.0' 0.10' Ditch Bottom: 0.5' 0.10' Cut and Fill Areas in Roadbeds: 0.2' 0.05' Cut and Fill Areas in Buildings: --- 0.05' Cut and Fill Areas in Aprons, Yards, etc.: 0.2' 0.05' 2. Where appropriate, the above tolerances, with the A/E's approval, can be exceeded if drainage is maintained and the grade is relatively uniform. In all cases the areas shall drain as intended. 3.7 GRADING A. Rough Grading: ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02200- 12 1. Cut, fill and grade to transform site to elevations and contours shown on site plan with allowances made for granular borrow, subgrade improvement, cushions, topsoil clay underlayment, top soil, and pavements. Grading tolerance,unless noted differently on the grading plan, shall be as noted above. 2. Slope grades away from buildings to insure temporary and permanent drainage protection before and after topsoil or other surfaces are placed. 3. Place backfill against foundations only after concrete has attained design strength and appropriate bracing is in place. 4. Remove all debris, building materials, large stones, boulders, branches or other obstructions. Hand level around permanent obstructions. 5. Finish by blade grader and heavy steel "H" beam drag. 6. Ease new grades into existing grades without awkward or abrupt transitions. B. Finish Grading, Topsoil Areas: 1. Place topsoil so that a minimum depth of 6" (maximum thickness of 12")is achieved after rolling and compaction. At pond area perimeter and wetland mitigation area, organic topsoil shall be placed to a minimum thickness of 12". All holes, depressions and rivulets shall be filled in and brought to a smooth grade. 2. Blade, drag and rake to uniform slopes, achieving a uniform surface. All sticks, branches, roots, stumps, rocks and other debris on the surface shall be picked up and removed from the site. 3. The finish grade preparation shall be performed only during periods when beneficial results are likely. During periods of excess drought, moisture or freezing conditions, the Contractor shall stop work and resume operations only when desired results are obtainable. 4. When the work is complete the topsoil shall be free of rocks(1" or larger) and other deleterious materials. Drainage should generally occur as interpretable from contours with no awkward or abrupt transitions of grade. 3.8 QUALITY CONTROL BY TESTING LABORATORY A. The Testing Laboratory, as retained by the Owner, shall conduct laboratory and field testing of soils prior to and during excavation, embankment placement and compaction operations. Soils testing shall include the following: 1. All fill soils, including topsoil, shall be analyzed for compliance with specifications. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02200- 13 2. Testing Laboratory representative shall be present at the site to establish excavation • limits, and observe and tes structural fill, placement, subgrade improvement or correction, building fill or backfill as it is being accomplished. B. Minimum Densities: Compaction shall meet the requirements of ASTM D698 for densities established by the Standard Proctor Method. Field density tests shall be performed in accordance with ASTM D1556(Sand Cone Method)or ASTM D2922(Nuclear Method, when approved). Densities of at least the following minimum percentage shall be obtained: 1. Subgrade in embankment construction: a. Fill under building areas: 95 percent b. Fill under roads, pavements, and walks(within upper 2 feet): 98 percent c. Fill under roads, pavements, and walks(below upper 2 feet): 95 percent d. Filled under grassed areas: 85 percent 2. Structrural fill for over excavation under foundations: 100 percent 3. Backfill/fill at building foundations: 95 percent 4. Underslab base: a. Granular base under building floor slabs: 100 percent b. Granular base under exterior concrete: 98 percent 5. Backfill at pipe zone(underground utilities): 85 percent 6. Backfill from pipe zone to building subgrade: 98 percent C. If soil analysis or compaction tests indicate that the materials specified have not been furnished, place or compacted in compliance with these specifications, the material shall be removed, replaced, recompacted and retested. The entire cost of this work, including the costs of retests, shall be paid by the contractor. D. Test Frequency: 1. Provide one mechanical or hydrometer analysis test (dependent on whether soil is cohesionless or cohesive)for each class of fill soil specified or fill soil from a given source. 2. Establish Proctor Standard(ASTM D698) (density and moisture content)for each class of fill, backfill, subcut or subgrade fill, structural fill, etc. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02200 - 14 3. Perform field density test in accordance with ASTM D1556-64 (Sand Cone Method) or ASTM D2922(Nuclear Method). On any given project, nuclear method shall be limited to 90%of total test number, with location mixed such that correlation with sand cone method can be easily made. The number of field density tests required shall be per the following: a. One test for each 200 cu.yds. of fill beneath building or fill used for subgrade correction, i.e.subgrade improvement and granular cushion. b. One test for each 100 cu.yds. of backfill at building perimeter. c. One test for each 500 sq.yds. of subgrade improvement at proposed paved areas. d. For each isolated volume of less than 200 cu.yds. 100 cu.yds. or 500 sq.yds. respectively, perform at least one test. 3.9 CLEAN-UP AND DISPOSAL A. Clean-up: Thoroughly police and rake the site and adjacent areas as required to provide neat clean surfaces. Areas outside the contract limits that have been disturbed during construction shall be restored to original or better conditions. B. Disposal: Haul excess excavated material, including excess topsoil, trash, debris and other waste materials to a location off the limits of the Owners property. 3.10 EARTHWORK A. The earthwork quantities(cut and fill)and specific soil material application requirements will result in both significant waste quantities and import quantities. The proposed topography and subgrade improvement will require off-site disposal of topsoil, unsuitable soil and excess soils. Conversely, the need to improve subgrade beneath building and pavement areas will require importing substantial quantities of granular borrow. Accordingly, it is the Contractor's sole responsibilities to meet all earthwork material/quantity requirements under the base bid with the exception of specific subcut and subcut fill requirements described under the Unit Prices. END OF SECTION ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02200 - 15 SECTION 02220 TRENCHING AND BACKFILLING PART 1 GENERAL 1.1 WORK INCLUDED A. Protection of existing structures, surface features and trees to remain; other protective provisions when required. B. Verification of existing conditions. C. Alignment and grade control. D. Excavation, backfill and compaction. 1.2 RELATED WORK A. Earthwork: Section 02200. B. Water Systems: Section 02665. C. Underfloor Drainage: Section 02710. D. Sewerage: Section 02720. E. Plumbing: Sections of Division 15 as applicable. F. Electrical Service and Distribution: Sections of Division 16 as applicable. 1.3 QUALITY ASSURANCE A. Utilize equipment of proper size and in good working condition to prosecute the work to full completion in a satisfactory manner. B. Utilize experienced personnel familiar with the equipment, methods and procedures for the job. C. Testing as specified herein. 1.4 REFERENCE STANDARDS A. American Society for Testing and Materials: ASTM(Latest Edition) 1. ASTM D698, "Test Methods for Moisture-Density Relations of Soils." ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02220- 1 2. ASTM D1556, "Test Method for Density of Soil In Place, Sand-Cone Method." 3. ASTM D2922, "Test Methods for Density of Soil In Place by Nuclear Methods." 4. ASTM D2488, "Standard practice for Description and Identification of Soil-Visual Manual Procedure"(Unified Soil Classification System-USCS) 5. AASHTO: "American Association of State Highway and Transportation Officials" 1.5 UNIT PRICE A. Unit cost per linear foot of trench length for 12" deep additional excavation and offsite material disposal and placement of pipe trench stabilization when recommended by testing laboratory representative. 1.6 TRENCHING TERMS A. Stabilization Aggregate: Crushed rock material for use for correcting an unstable trench subgrade. B. Pipe Bedding: Soil material placed in the trench to form a foundation for the piping. C. Initial Backfill: Soil material placed over the pipe bedding and around the pipe to a level of 12" above the top of the pipe. D. Select Trench Backfill: Backfill material above the initial backfill when the trench is under buildings or pavement areas. Pavement areas include bituminous and concrete or similar surfacing. E. General Trench Backfill: Trench backfill as applicable to lawn or landscape areas.. F. Duct Backfill: Material placed under and around underfloor ductwork. G. Type V Geotextile: A geotextile used for stabilizing trench subgrade. PART 2 PRODUCTS 2.1 MATERIALS A. Stabilization Aggregate: 1. The material shall be 100%crushed quarry rock, gradation per ASTM C33, Size No. 4. B. Bedding: ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02220 -2 1. Granular soil (GW, GP, GP-GM, SW, SP OR SP-SM)with 5%or less passing the 200 sieve. The maximum particle size shall be 1/2" for plastic pipes or polyethylene wrapped pipes or coated pipes. The maximum particles may be up to 1" for Reinforced Concrete Pipe. C. Initial Backfill: Shall be the same as bedding material. D. Duct backfill : Shall be the same as bedding material. • E. Select Trench Backfill shall be: Granular soil(GW, GP, GP-GM, SW, SP OR SP-SM, SM, SC)with 5%or less passing the 200 sieve. F. General Trench Backfill shall be: 1. Soils noted for select trench backfill, bedding and initial backfill materials are acceptable. 2. The following soils are also acceptable: a. Lean clay mineral soils with a liquid limit of 35 or less and a plasticity index of 15 or less. G. Geotextile for pipe trench stabilization: Use hErafi Type 500C, or approved equal. H. Material Availability: 1. Based on the geotechnical report,the following soil types are anticipated to be on site: (General trench backfill)remove the brackets. 2. Based on the geotechnical report, the following soil types are unlikely to be available on site;therefore,the following materials must be imported: (select trench backfill), (initial backfill), remove all brackets(stabilization aggregate), (bedding material). PART 3 EXECUTION 3.1 LOCATION TOLERANCES A. The Utility Contractor shall accurately locate all structures per the coordinates given for the center of the structures. The following tolerances are required: 1. CB on curb lines: + .25'horizontal. 2. CB or MH in grass areas: + 1.0'horizontal. 3. Hydrant locations: + .5'horizontal. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02220 - 3 4. Hydrant elevation: (must be within tolerance as shown on detail). B. Secure all necessary permits and notify the City and A/E of intended schedule. C. Have private utilities located by appropriate Utility Company. D. Coordinate excavation schedules and soil disposal with Earthwork Contractor as applicable. E. Charges for utility connections, utility repair and City inspection fees shall be paid for by the Contractor prior to work proceeding. 3.2 PREPARATION A. Verify the following prior to placing any pipes or structures: Inverts of manholes to which connections are to be made; inverts at all utility crossings, including but not limited to water mains, sewers, gas, electric, communications,telephone and all connection points to existing utilities. 1. Notify the A/E of any discrepancies. 3.3 GROUND WATER A. Review the soil boring logs for ground water elevations. Maintain trenches free of ground water during pipe installation. 3.4 EXCAVATION A. General Excavation 1. Excavated material satisfactory for backfill shall be stockpiled in an orderly manner at a distance from the trench edge to prevent slide of cave-ins. The stockpile shall be protected from contamination due to unsatisfactory excavated material. 2. Excavated material not suitable for backfill shall be disposed of offsite or as negotiated with the earthwork subcontractor. Unauthorized over-excavation shall be backfilled with compacted bedding material at no additional cost to the Owner. B. Trench Excavation 1. The trench depth, width, side slopes and benches shall be per OSHA Codes. Local, state and federal codes shall also govern. 2. Trench Subgrade: Once trench excavation is apparently complete for underground sewer and water lines,the testing laboratory representative shall inspect and test the exposed trench subgrade. Acceptability of trench subgrade of appropriate corrective ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02220-4 action as noted below shall be at the discretion of the testing laboratory representative. Testing shall include hand auger penetrations, one penetration for every 30 feet of trench. a. If soils beneath the trench bottom exhibit competency similar to moderately well consolidated mineral soils, the installation of pipes and structures need only incorporate normal bedding requirements. b. If soils beneath the trench bottom exhibit general competency with some limited local zones of soft or compressible materials,. subcut excavation and installation of pipe trench stabilization is required. If trench bottom exhibits a general condition of soft or compressible materials, a general application of subcut excavation and pipe trench stabilization is required. The additional excavation(subcut excavation) and placement of pipe trench stabilization when recommended by the testing laboratory representative, shall be considered as extra work and compensated for per unit price. . 3. Excavation for Structures: Excavation for manholes or similar structures shall provide at least 12 inch clearance between structure face and excavation. 4. Temporary Provisions: Where existing active sewers are encountered during trenching, provide adequate provisions to divert flow or pump as necessary to maintain operational function and provide dry work area. 5. Sheeting and Shoring: Except where trench banks are cut back at stable slopes, trench excavations shall be sheeted, braced and shored as necessary to provide protection for workmen, pipe and structures. 3.5 BACKFILL A. Stabilization Aggregate: 1. Line unstable trench with geotextile fabric, providing enough fabric so that aggregate can be fully wrapped as detailed. 2. Place stabilization aggregate material in maximum loose lifts of 6", and mechanically • compact each lift until there is no further evidence of consolidation. B. Pipe Bedding: 1. Place pipe bedding material in maximum loose lifts of 6". 2. Compact each lift to 98% Standard Proctor Density(ASTM D698). 3. Test compaction every 200 lineal feet of trench. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02220 - 5 C. Initial Backfill: • 1. Place initial backfill material in maximum loose lifts of 6". 2. Compact each lift to 95% Standard Proctor Density(ASTM D698). 3. Test compaction every 200 lineal feet of trench. D. Select Trench Backfill: 1. Place select trench backfill in maximum lifts of 12" prior to compacting. 2. Compact each lift to 98% Standard Proctor Density(ASTM D698). 3. Test density in every second lift per 100'of trench. E. General Trench Backfill: 1. Place trench backfill material in maximum loose lifts of 18" prior to compacting. 2. Compact each lift to 93% Standard Proctor Density(ASTM D698). 3. Test density every second lift per 200'of trench. F. General Procedures: 1. Remove all shoring used to control side slopes as backfilling occurs. 2. Backfill placed around structures shall be in 8" maximum lifts. 3. Match existing elevations adjacent to the trench at the time the trench is backfilled. If the trench is in a fill area, the earthwork contractor will fill over the pipe zone material. 3.6 DEPTH OF COVER AND MARKING A. Water Lines: Trenches shall be excavated to a depth as required to provide a minimum cover from top of pipe to proposed finish grade of 7.5 feet. B. Electrical Distribution: Special trenching requirements,when applicable, are specified in Division 16. C. Plastic Marking Tape: Warning tape shall be of the type specifically manufactured for marking the location of underground utilities. The tape shall be installed directly above the pipe at a depth of 18" below proposed finish grade. The tape shall be acid and alkali- resistant polyethylene film, 6" wide. Tape color shall be as follows: ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02220- 6 Electric Red Gas, Oil and Dangerous Material Yellow Telephone, telegraph, television, police and line communications Orange Water Blue Sewer Green 3.7 RESTORATION A. Areas of new surfacing: 1. Backfill to the proposed subgrade elevation, i.e. finish grade, less the thickness of pavement and base. 2. Where new surfacing is not shown or does not extend to the limits of trench work, this contractor shall be responsible for surface improvements/restoration consistent with existing surface. B. Lawns: Minimum requirements will be 6 inch thickness of specified topsoil and cultured sod. Seed is not acceptable. 3.8 FIELD AND LABORATORY TESTS A. General Requirements: The Owner shall retain an independent geotechnical testing laboratory to conduct laboratory and field testing of soils prior to and during excavation, filling,backfilling and compaction operations. Soil testing to include that specified above and the following: 1. All stabilization aggregate, bedding, initial backfill, select and general trench backfill material shall be analyzed for compliance with specifications. 2. Geotechnical laboratory representative shall be present at site each day when trench excavation and backfill are being accomplished. The laboratory representative shall approve the trench subgrade as being stable or rrecommend the application of pipe trench stabilization prior to placing of bedding material. 3. The independent testing laboratory shall submit to the Architect/Engineer copies of all soil reports(mechanical analysis, Atterburg Limits, compaction tests, etc.) as they are completed. 4. No trench backfill materials shall be placed unless necessary soil analysis tests have been performed and materials found in conformance with specifications. No trench backfill shall be placed without specified field density tests performed. 5. Establish Standard Proctor(ASTM D698)for density and moisture content as applicable to pipe bedding and trench fill material. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02220 - 7 B. Compaction shall meet or exceed the percentage of Standard Proctor Density(ASTM D698) specified in this section. C. Field Density Tests shall be performed in accordance with ASTM D1556 (Sand Cone Method)or ASTM D2922 (Nuclear Method, when approved). END OF SECTION ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02220 - 8 SECTION 02270 PRECAST GRAVITY RETAINING WALLS PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Furnishing and installing concrete modular block retaining wall units to lines and grades indicated on the construction drawings and as specified herein. B. Related Sections 1. Section 02200-Earthwork. 1.2 QUALITY ASSURANCE A. Utilize experienced personnel familiar with the products, equipment, methods and procedures for the job. B. Contractor shall check the material upon delivery to assure that proper material have been received. C. Contractor shall protect material from damage. Any damaged material shall be rejected and become the property of the contractor. D. Quality control by testing laboratory. 1.3 REFERENCE STANDARDS A. American Society for Testing and Materials-ASTM. PART 2 PRODUCTS 2.1 MATERIALS A. Concrete Units 1. Concrete wall units shall have a minimum 28 days compressive strength of 2500 psi in accordance with ASTM C-90. The concrete shall have adequate freeze/thaw protection with a maximum moisture absorption rate of 6%. Modular units by Anchor Wall Systems, Keystone and simular products will be considered, subject to approval by A/E. 2. Exterior dimensions may vary. Units are required to have a minimum of one half ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02270 - 1 square foot of face area each. 3. Retaining wall units shall provide a minimum of 100 psf of wall face area. Fill which is contained within the dimensions of the units may be considered as 80%effective weight. 4. Exterior face shall be textured. Color shall approximate building color.. 5. The units shall be positively interlocked. B. Select Granular Fill: Base material and unit fill shall consist of free draining fill;gradation shall include material with fines limited to 5%passing the #200 sieve, and less than 50% of material passing the#40 sieve. C. Backfill: Material shall be granular borrow as specified in Specification Section 02200. PART 3 EXECUTION 3.1 FOUNDATION SOIL PREPARATION A. Foundation soil shall be excavated to the lines and grades as shown on the construction drawings or as directed by the Testing Laboratory representative. B. Foundation soil shall be examined by the Testing Laboratory representative to assure that the actual foundation soil strength meets or exceeds a design strength of 2000 psf. C. Over-excavated areas shall be filled with compacted granular material. ' D. Foundation soil shall be proof-rolled prior to fill placement. 3.2 BASE PREPARATION A. Base shall be placed as shown on the construction drawings with a minimum thickness of 6". B. Base materials shall be installed upon compacted granular borrow or undisturbed native soils. C. Material shall be compacted so as to provide a level, hard surface on which to place the first course of units. Compaction shall be with mechanical plate compactors to 95% of Standard Proctor Density(ASTM D698) D. Base shall be prepared to ensure complete contact of retaining wall unit with base. Gaps shall not be allowed. E. Base materials shall be to the depths and widths shown. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02270 - 2 3.3 WALL ERECTION A. First course of concrete wall units shall be placed on the prepared base. Place the first course of units with top down so as to ensure lip of unit is at the face of the wall. The units shall be checked for level and alignment. The first course is the most important to ensure accurate and acceptable results. B. Ensure that units are in full contact with base. C. Units are to be placed end to end for full length of wall alignment. Alignment shall be done by using a string line or offset from a base line. Contractor shall follow manufacturer's installation instructions when making radius curves. D. Compact fill. E. Sweep all excess material from the top of the units and install next course. Fill all voids. F. Lay up each course making sure that the lip of the unit is placed against the back of the succeeding course. Pull unit forward as far as possible. Backfill and compact soil behind the units. Repeat procedure to the extent of wall height. 3.4 WALL FILL PLACEMENT • A. Wall fill material shall be placed in lifts and compacted as under Specification Section 02200. B. Only hand-operated compaction equipment shall be allowed within 3 feet of the wall face. C. Backfill shall be placed from the wall outward, to ensure that the geogrid remains taut. 3.5 QUALITY CONTROL BY TESTING LABORATORY A. Testing Laboratory to be retained by Owner. B. Mechanical analysis, field and laboratory density tests in accordance with applicable Article of Section 02200. • END OF SECTION ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02270- 3 SECTION 02500 BITUMINOUS PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Inspection of subgrade. 2. Fine grading of subgrade. 3. Material analysis and tests by testing laboratory. 4. Placement and compaction of aggregate base. 5. Bituminous pavement. 6. Parking stalls and traffic lane painting. B. Related Sections: 1. Section 02200-Earthwork 2. Section 02515 - Sitework Paving: Concrete. 1.2 QUALITY ASSURANCE A. Utilize equipment of proper size and good working condition to prosecute the work to full completion in a satisfactory manner. B. Utilize experienced personnel familiar with the equipment,methods and procedures for the job. C. Testing specified herein. 1.3 REFERENCE STANDARDS A. Minnesota Department of Transportation Specifications for Construction,latest edition: MnDOT. B. American Society for Testing and Materials: ASTM ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02500- 1 PART 2 MATERIALS 2.1 PAVING MATERIALS A. Aggregate Base Material: Conform to MnDOT, Section 3138,Class 5, 100% crushed quarry rock. B. Bituminous Base Course: Conform to MnDOT, Section 2331,Type 31B,except as amended in paragraph F. Provide an asphalt cement with 120-150 penetration. Asphalt content of mixture per result of job mix formula or as noted otherwise. C. Bituminous Tack Coat(Deduct Alternate#1): Conform MnDOT, Section 2357, SS-1, emulsified asphalt. D. Bituminous Wear Course(Deduct Alternate#1): Conform to MnDOT, Section 2331, Type 41B,except as amended in paragraph F. Provide an asphalt cement with a penetration of 85-100.Asphalt content of mixture per job mix formula or as noted otherwise. NOTE: The tack coat and bituminous surface course shall be installed under a subsequent separate contract. E. Parking Stall and Traffic Lane Paint(Deduct Alternate#1): White color alkyd paint formulated specifically for traffic marking. F. Modifications: Amend MnDOT,Specification Sections 2331 and 2341 as follows: 1. Payment on the basis of units placed and similar requirements are not part of this specification. 2. Submit a job-mix formula,prepared by an independent testing laboratory,to the Architect/Engineer for acceptance. A job mix formula from a current large asphalt project may also be acceptable. 3. Do not place the bituminous courses prior to acceptance of the job mix formula by the Architect/Engineer. 4. Provide and pay for all samples,reports,tests,etc.,required to develop the job-mix formula. 2.2 THICKNESS AND/OR QUANTITIES OF MATERIALS A. Aggregate Base Material: 4" thick at Design Area"A." 9" thick at Design Area"B." B. Bituminous Base Course: 2"thick at Design Areas "A"and"B." C. Bituminous Wear Course(Deduct Alternate#1): 2" thick at design Areas "A"and"B." ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02500-2 D. Bituminous Tack Coat(Deduct Alternate#1): 0.05 gal/sq.yd.on all bituminous base course. E. Parking Stall and Traffic Lane Paint(Deduct Alternate#1): 300 lin.ft gallon minimum (4" wide strip). PART 3 EXECUTION 3.1 EXAMINATION OF CONDITIONS A. Conditions Existing: Review all conditions,levels,elevations and drainage of areas before starting work. B. Conformance: If subgrade conditions are unsatisfactory,have corrections made by General Contractor before proceeding. 3.2 INSTALLATION OF BASE AND PAVING A. Subgrade: Fine grade as required to remove minor grade irregularities before installation of base. 1. Shape subgrade according to site plan and as required to provide positive drainage of areas. B. Base: Place aggregate base as follows: 1. Provide material and thickness as previously specified. 2. Provide one sample of aggregate base material to testing laboratory for mechanical analysis (AASHTO T27). Submit report to Architect/Engineer. 3. Construct aggregate base in conformance with MnDOT Specification Section 2211. Compaction per 2211.3 Cl. 4. Shape base course surface according to site plan and as required to provide positive drainage. C. Paving: Place bituminous paving as follows: 1. Place and compact bituminous base course and wear course as previously specified in general conformance with MnDOT,Section 2331.3. Compaction per 3.4 below. 2. Finish bituminous surface shall be uniform of plane such that no significant puddles (greater than 1/8" deep)exist after rain or watering. The surface shall show no variation greater than 3/16" from the edge of a 10'straightedge. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02500-3 • 3.3 PARKING STALL AND TRAFFIC LANE PAINTING A. Surface Condition: The application area shall be dry and free of all contamination including oil,dirt,grease,curing compound and other matter than might adversely affect adhesion or durability of the marking material. Cleaning shall be accomplished with rotary brooms,air blast,hand brooms,scrapers,or whatever combination of equipment that is necessary to produce a clean surface without damage. B. Application Equipment: The equipment shall consist of a spray type machine capable of applying the paint under pressure at a controlled temperature through nozzles equipped with remotely controlled cut off mechanisms and suitable line guides that will produce clean cut lines and prevent excessive paint drift. C. Restrictions: Pavement markings shall only be applied in seasonable weather during daylight hours when the air temperature is 50P or higher.The filling of paint tanks, pouring of paint,or cleaning of equipment shall not be performed on unprotected pavement. D. Application: Apply paint to full well coated coverage,four inch wide stripes to layout as shown on site plan. E. Protection: Keep painted areas free of traffic for a minimum of four hours or until thoroughly dry. 3.4 TESTING A. The Contractor shall retain an independent testing laboratory,experienced in testing asphalt and aggregates,to perform tests as specified below. B. Aggregate Base: Visually verify that the surface exhibits thorough consolidation. Take one field density test(ASTM D-1556)for every 5000 square yards of pavement area. Density shall meet 100% Standard Proctor(ASTM D698).• C. Aggregate Base Quality and Sieve Analysis: Perform the following tests at the intervals noted. 1. Sieve Analysis (ASTM C136)for every 250 tons to verify compliance with specifications. D. Bituminous Density and Thickness: 1. Take one core sample for every 1,000 sq.yds.of bituminous area or a minimum of two cores whichever yields more tests;test locations to be uniformly distributed throughout the paved area. Determine density and thickness;compare percent density to that determined by the 50 blow Marshall Method. Each core sample shall be within 1/2" of specified thickness and have a density of not less than 95% of the density obtained by the 50 blow Marshall Method. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02500-4 2. In the event that specified density for any definable area has not been obtained as determined by test, densities up to 5 percent below specified value will be accepted, but at a reduced price as indicated below. The reduced price shall be based on the following: Pay Factor Field Density (percent of unit price as deter- (percent below Specified Minimum) mined from contract breakdown) 0% 100% 0 to 1% 98% 1 to 2% 95% 2to3% 90% 3 to 4% 85% 4 to 5% 75% 3. In the event that density as determined by test for any definable area is more than five percent below specified value,the bituminous course shall be removed and replaced. 4. Where the average thickness of the bituminous section as determined by core samples is less than but not more than 1/2" less than the design thickness,the bituminous section may be accepted,but at a reduced price that is directly proportional to the installed thickness as compared to the design thickness. Where the average thickness is more than 1/2"less than the design thickness,the bituminous course shall be removed and at the Contractor's expense. The Architect/Engineer shall establish the limits of pavement replacement. E. Extraction,gradation of inplace bituminous. 1. For each 500 tons of bituminous,test for A.C.content and gradation conformance to the job mix formula. Testing to be done per ASTM D2172. In all situations,take at least one test. END OF SECTION ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02500-5 SECTION 02515 SITEWORK CONCRETE PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Cast-in-place concrete,cement,aggregates and admixtures. 2. Curb and gutter. 3. Concrete sidewalks. 4. Equipment pads:As noted on plans. B. Related Sections: 1. Section 02200-Earthwork,preparation of subgrade. 2. Section 03300-Cast-in-Place Concrete. 1.2 QUALITY ASSURANCE A. Use plant mixed concrete mixed in stationary mixers. Mix and deliver concrete in accordance with ASTM C94. B. Perform concrete work in accordance with ACI 304 and 318,unless specified otherwise. C. Obtain materials from same source throughout the work. D. Weather Limitations: Comply with ACI 306 when concreting during cold weather. When heating, do not allow carbonation to occur. Conform to ACI 305 when concreting during hot weather,including avoidance of alkali reactions to hardened surface. Refer to ACI 301,Article 8.4 for weather restrictions and placing temperatures. E. Testing as specified. 1.3 REFERENCE STANDARDS A. ASTM C150- Specification for Portland Cement. B. ASTM C94- Specifications for Ready-Mixed Concrete. C. ASTM C260-Air Entraining Admixtures for Concrete. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02515 - 1 D. ASTM A185 -Welded Steel Wire Fabric for Concrete Reinforcement. E. ASTM A615 - Specifications for Deformed and Plain Billet Steel Bars for Concrete Reinforcement. F. ASTM C33 - Specifications for Concrete Aggregates. G. ASTM 751 -Preformed Expansion Joint Fillers for Concrete Paving and Structural Construction(Non-extruding and Resilient Bituminous Type). H. ASTM C309 -Liquid Membrane forming Compounds for Curing Concrete. I. ASTM C143-Test Method for Slump of Portland Cement Concrete. 1.4 SUBMITTALS A. Shop Drawings: Submit in accordance with Section 01300 for sPecially finished concrete. B. Samples: Submit samples of specially finished concrete for appearance acceptance. PART 2 PRODUCTS 2.1 MATERIALS A. Cement: ASTM C150,Type 1,corresponding to cement on which selection of concrete proportions was based. Use the same brand for each required type of concrete. B. Aggregates for Exterior Horizontal Concrete: Limits of deleterious substances and physical property requirements of fine and coarse aggregates shall comply with ASTM C33 and following additional requirements for exterior horizontal concrete. 1. Amount of deleterious substances in fine aggregate shall not exceed the following limits: Weight Percent of Item Total Sample Maximum Clay lumps and friable particles 0.5' Material finer than No. 200 sieve 3.0 Coal and lignite None Shale None 2. When fine aggregate is tested for potential reactivity by chemical method in accordance with ASTM C298,relationship between the quantity Rc(reduction in alkalinity)and the quantity Sc(dissolved silica)shall indicate that material is innocuous. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02515 -2 • 3. Coarse aggregate for exterior horizontal concrete shall be size number 67(3/4 inch to No.4)and shall be 100% crushed quarry rock composed of basalt,quartzite,granite, limestone or dolomite. 4. When subject to five cycles of soundness test using magnesium sulfate in accordance with ASTM C88,coarse aggregate shall have a loss of not more than 18%. 5. Coarse aggregate shall have a maximum abrasion loss of 40%of weight when tested in accordance with ASTM C131, Grading B. 6. Requirements of ASTM C33,Table 3,as to amount of material in coarse aggregate having specific gravity lighter than 2.4 shall include iron oxide. C. Water: Fresh, clean,potable,free from injurious amounts of oils,acids,alkalies,salts, organic materials,or other substances that may be deleterious to concrete or steel. D. Water Reducing Admixtures: ASTM C494,Type A. Add to concrete in strict accordance with the manufacturer's instructions. E. Air-Entraining Admixtures: ASTM C260. Where required air contents are specified,add in strict accordance with manufacturer's instructions. F. Calcium Chloride Admixture: Do not use. G. Reinforcement: Welded steel wire fabric,ASTM A185;dowels of plain steel bars conforming to AASHTO M31 or M42;tie bars deformed steel bars conforming to AASHTO M31 OR M42. H. Granular Borrow: As specified under Section 02200,Earthwork. I. Forms: Steel,wood,or other suitable material of size and strength to resist movement during concrete placement and to retain horizontal and vertical alignment until removal, matched,tight fitting and straight,free of distortion and defects. J. Crushed Aggregate Base: When indicated,crushed aggregate base shall be Class 5 gradation, 100%crushed,and meet MnDOT Spec. Section 3138. K. Polyurethane sealer as per ASTM C920,Type M or S,class 25,Grade P,polyurethane based,two part or one part sealout,self leveling. L. Truncated dome pavers when indicated on handicap ramps,shall be as per Americans with Disabilities Act design,as manufactured by Hastings Pavement Co.,NY,or approved equal. M. Expansion Joint Caps: Plastic joint cap to be utilized in expansion joints shall be Contie plastic joint cap as distributed by Brock White Company,MN. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02515 - 3 2.2 CONCRETE ACCESSORIES A. Curing and Sealing Compound: Clear styrene acrylate type,30% solids content minimum, and have test data from an independent testing laboratory indicating a maximum moisture loss of 0.030 grams per sq.cm.when applied at a coverage rate of 300 sq.ft.per gallon. Acceptable products are Super-Diamond Clear by the Euclid Chemical Company,Master Kure by Master Builders,or Klear Seal by National Construction Products;Manufacturer's Certification Required. B. Expansion Joint Fillers(backing for sealant): Flexible,compressible,closed cell polyethylene foam,not less than 10 psi compression deflection. C. Expansion Joint Sealant: Silicone joint sealant,Dow Coming#888.Product available from Construction Materials,Inc.,Telephone number 929-0431. 2.3 CONCRETE MIXES A. General: Manufacture and deliver concrete in accordance with ASTM C94 with exceptions specified herein. B. Minimum Compressive Strength: 4000 pounds per square inch at 28 days of age. C. Air Entrainment: Not less than 5%nor more than 7%entrained air for all exterior exposed concrete. D. Maximum Slump: 4"for all mixes. Slump shall be determined by the "Test for Slump of Portland Cement Concrete" (ASTM C143). E. Mix Designs: Provide minimum cement contents for each strength of concrete and maximum size coarse aggregates as follows. These minimum cement contents shall be increased if testing of concrete indicates that additional cement is necessary in order to comply with concrete strength requirements. 4000 lbs.per. sq. in. -with air-entraining and water-reducing admixtures 564#per cubic yard for 3/4" maximum size aggregate. 588#per cubic yard for 3/8" maximum size aggregate. PART 3 EXECUTION • 3.1 SURFACE PREPARATION A. General: Refer to Section 02200,Earthwork for finished subgrade. Subgrade shall be tested for grade and cross section with a template.Maintain subgrade in a smooth, compacted condition. Remove loose material from compacted subbase surface immediately before placing concrete. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02515 -4 B. Prepared Subgrade: If subgrade conditions are unsatisfactory,have corrections made by General Contractor before proceeding. Do not begin paving work until subgrade conditions are acceptable,including specified compaction,as verified per compaction tests, Spec. Section 02200,Earthwork. C. Crushed Aggregate Base: Place and compact crushed aggregate base beneath curb and gutter and concrete drives per MnDOT Spec. Section 2211. Coordinate placement of aggregate base with bituminous pavement contractor. 3.2 PLACING CONCRETE A. General: Place concrete in accordance with ACI 301,Chapter 8. Consolidate concrete in accordance with ACI 309 using high frequency vibrators. Unless noted or detailed otherwise, sidewalk slabs shall be 4"thick. B. Forms: Set forms to required grades and lines,rigidly braced and secured. Install sufficient quantity of forms to allow continuous progress of work,so that forms can remain in place at least 24 hours after concrete is placed. Set with allowable tolerance of 1/8 inch when checked with a straightedge. Forms shall not deviate from true line by more than 1/4 inch at any point. Clean and oil forms at each use. Where curvilinear curbs are shown, form work shall be placed/constructed to"true arc"layout. Short tangent segments will not be accepted. C. Reinforcing: Locate,place and support reinforcement as indicated or with a minimum of 1-1/2" concrete cover. Do not extend reinforcing through expansion and contraction joints. Provide dowelled joints through expansion and contraction joints with one end of dowels fitted with capping sleeve to allow free movement. Keep reinforcing free of dirt, oil,rust, scale or other substances. Install welded wire fabric in as long lengths as practicable and offset end laps in adjacent sheets a minimum of two cross wire spacings. Make all end and side lap splices so the overlaps between outermost cross wires of each sheet are not less than 2". D. Sidewalk Joints: Unless noted or detailed otherwise,provide for expansion joints in sidewalks at intervals not to exceed 40 feet on centers and where walks abut curbs, stoops, walls or other fixed objects.Expansion joints shall be 1/2" wide using filler materials specified in Article 22. Provide tooled weak plane joints across sidewalks, 1-1/2" deep x 3/8" at 5'-0" intervals,unless otherwise noted. Tool edges of joints to a 1/4" radius. E. Curbs And Gutters: Provide control joints in poured in place concrete curbs, 10'-0" o.c. maximum spacing with expansion joints not over 40'-0"o.c. Make control joints by cutting approximately 1/8" wide x 1"to 1-1/2"deep into exposed surfaces. Expansion joints shall be 1/2" wide with joint filler. At curbs adjacent to sidewalks,align joints in curb and sidewalks. F. Sealants: Install sealant in accordance with Section 07900-Joint Sealers. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02515 - 5 G. Place concrete,strike-off,consolidate and screed and wood float surfaces to a smooth and uniform finish,free of open texturing and exposed aggregate. Test surfaces for trueness with a straightedge. Remove surface irregularities and refloat repaired areas to provide a continuous smooth surface. Work edges of slabs,gutters,back top edge of curb and formed joints with an edging tool,and round to 1/8"radius,unless otherwise indicated. Eliminate tool marks on concrete surface. H. Finishing: Broom or belt finish sidewalks and curbs except for specially finished areas. After the concrete has been floated it shall be given a coarse transverse scored texture by drawing a broom or burlap belt across the surface. Slope sidewalks to drain with all water pockets eliminated.All floated or broomed surfaces shall be finished to an FL 25 tolerance. I. If objectionable air holes,honeycombed areas or other surface defects occur,as determined by the Architect/Engineer;repair defects in accordance with ACI 301,Article 13.6. J. Apply curing compound on finished surfaces immediately after placement.Apply in accordance to manufacturer's recommendations. K. Cleaning: Sweep and clean concrete surface of all debris;remove all foreign material from joints and seal as specified. L. Protection: Protect concrete from all damage prior to final acceptance.Remove concrete containing excessive cracking,fractures, spilling or other defects and reconstruct entire section between regularly scheduled joints when directed at no additional cost to the Owner. M. Surface Drainage: All concrete surface shall be placed so as to drain and prevent water from puddling. Conform to slopes shown on plans;where slopes are not shown,slabs shall have a minimum slope of 1/8 inch/per ft.in the direction of drainage as interpretable from contours. 3.3 QUANTITIES A. Walks: 4"Thick Concrete 4"Thick Granular Fill B. Curb and Gutter: Concrete as detailed 4"Thick Crushed Aggregate Base 3.4 TESTING A. General Requirements: The Contractor shall retain an independent testing laboratory to conduct laboratory and field testing as noted below. B. Materials Testing in Field: ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02515 -6 1. Provide a technician at site of placement to perform concrete sampling and testing. 2. Take concrete samples in accordance with ASTM C172. Mold and cure compression test cylinders in accordance with ASTM C31. Make at least four cylinders for each 50 cubic yards or less of each concrete type,and at least four cylinders for any one day's pour for each concrete type. After good concrete quality control has been established and maintained as determined by A/E, make four cylinders for each 100 cubic yards or less of each concrete type, and at least four cylinders from any one day's pour for each concrete type. Label each cylinder with an identification number. A/E may require fewer cylinders per set to be molded and cured under job conditions. 3. Test slump of concrete periodically and during making of concrete test cylinders. Method of making a slump tests shall be as described in ASTM C143. 4. Determine air content of air entrained concrete at least twice a day during progress of work and during making of concrete test cylinders.Determine air content by either ASTM C173 or ASTM C231. 5. If slump or air content fall outside specified limits another test shall be made immediately from another portion of same batch. C. Laboratory Tests of Field Samples: 1. Test compression test cylinders for strength in accordance with ASTM C39. For each test series,test one cylinder at seven days and two cylinders at 28. The remaining cylinder will be used as a spare to be tested at either seven or 28 day test as required. Laboratory test reports shall be compiled as follows: Compressive strength test shall be the result of one cylinder for seven day test,and the average result of two cylinders for 28 day test. When any one cylinder shows evidence of improper sampling,molding or testing,it shall be discarded and replaced by the spare cylinder. D. Report Data Required: Furnish certified compression test reports(duplicate)to A/E and Owner. Test report shall include the following information: 1. Cylinder identification and date cast. 2. Specific location at which test samples were taken and concrete ticket number. 3. Type of concrete,slump and percent air entrainment. 4. Compressive strength of concrete in psi. 5. Weather conditions during placing. 6. Temperature of concrete in each test cylinder when test cylinder was molded. 7. Maximum and minimum ambient temperature during placing. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02515 -7 8. Ambient temperature when concrete sample was made. 9. Date delivered to laboratory and date tested. 10. The results of companion cylinders(accelerated strength testing)shall be included when applicable. 11. A copy of the test reports that include companion cylinder test results shall be furnished to the Architect/Engineer. END OF SECTION ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02515 - 8 SECTION 02600 WATER SYSTEMS PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Staking and alignment. 2. Excavation,backfilling and compaction of trenches. 3. Protective provisions including sheeting,shoring,bracing,pumping and bailing. 4. Pipe Materials,appurtenances,etc.including installation. 5. Hydrostatic/Leakage testing. 6. Disinfection of water in piping mains and testing. 7. Testing to comply with Health Department requirements and local and county government regulations. 8. Notification of city inspector and payment of fees as applicable. 9. Water systems as specified herein includes all water works outside the building perimeter plus the penetration of the building wall to the first mechanical pipe joint; penetration of wall shall include sleeve and appropriate seal. B. Related Sections: 1. Section 02200-Earthwork. 2. Section 02220-Trenching and Backfilling. 3. Section 15200- Interior Water Supply System. 1.2 QUALITY ASSURANCE A. Furnish new,best quality pipes, fittings,valves, hydrants,etc. of weight and dimensions as specified. B. Utilize equipment of proper size and in good working condition to prosecute the work to full completion in a satisfactory manner. 1607.001 -ORONO ICE ARENA(CP-2) Page 02600- 1 C. Utilize experienced personnel familiar with the equipment,methods and procedures for the job. D. Coordinate city inspection and required procedures with applicable city official. E. Tests per City requirements. 1.3 CITY SPECIFICATIONS A. The materials,construction requirements,pipe laying operations,service installation, connections,hydrant setting,disinfection,restoration,interruption,operational inspection, conductivity and leakage tests shall conform fully to Watermain and Service Line Installation Specifications as prepared by the City Engineers Association of Minnesota, and Supplemental Specifications thereto per the City of Orono,Minnesota. B. The water utility contractor shall secure a copy of the aforementioned specification from the league of Minnesota Cities, St.Paul,Minnesota. Supplemental Specifications are available from the City of Orono Engineering Department. END OF SECTION 1607.001 -ORONO ICE ARENA(CP-2) Page 02600 -2 SECTION 02710 UNDERFLOOR DRAINAGE PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. All installation and materials for a complete working foundation drainage system. B. Reference Standards: 1. ASTM: American Society for Testing and Materials. C. Related Sections: 1. Section 02200-Earthwork. 2. Division 15---Plumbing. PART 2 PRODUCTS 2.1 MATERIALS A. Underfloor Drainpipe: Shall be perforated corrugated"Heavy duty"polyethylene drain pipe and fittings in accordance with the requirements of ASTM F405. The drainpipe shall be furnished with a geotextile sock filter material meeting the criteria for Geotextile filter fabric noted below. B. Drainpipe filter aggregate: Shall meet ASTM C33 Concrete aggregates for a size number 8, 3/8" minus material PART 3 EXECUTION 3.1 INSTALLATION A. Excavate to provide a minimum 6" clear distance around the drain pipe and as required to hydraulically connect the"drainage zone"material(section 02200)to the foundation drainpipe. B. Underfloor Drainpipe: Place a 4"minimum thickness of filter aggregate in the bottom of the excavation to obtain the invert grades shown on the foundation plan. Compact this material with a vibratory compactor.Place the drainpipe with sock in the prepared filter aggregate material to layout and invert elevations shown on drawings.Backfill additional filter agagregate above the drainpipe cushion layer, as required to maintain contact between the filter aggregate material and granular ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02710- 1 3.2 TESTS A. Provide mechanical analysis (AASHO T-27)of filter aggregates. Mechanical analysis to be performed by an independent testing laboratory.If the material used is purchased as a product from an aggregate producer,submit information on gradation and quality control. END OF SECTION ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02710-2 SECTION 02720 SEWERAGE PART 1 GENERAL 1.1 SUMMARY A. Section Includes: All site sewerage piping and appurtenances which are 5'or more outside building perimeters. B. Related Sections: 1. Section 02200-Earthwork. 2. Section 02220-Trenching and Backfilling. 3. Section 02515 -Concrete. 1.2 REFERENCE STANDARDS A. American Society for Testing and Materials: ASTM (latest edition) B. American National Standards Institute: ANSI (latest edition) 1.3 SUBMITTALS A. Submit a list of all materials and suppliers. B. Submit shop drawing cut sheets on all sewer structures. PART 2 MATERIALS • 2.1 PIPE A. Reinforced concrete pipe"RCP": Shall conform to the following provisions: 1. Pipe: Circular Pipe shall meet requirements of ASTM C76 for CLASS III pipe. 2. Joints: Unless noted otherwise either of the following joints may be used. a. RCP pipe shall have bell and spigot joints sealed with "0"ring type seals, meeting ASTM C 361 and C 443. b. RCP pipe shall have Modified tongue and groove joints sealed with preformed butyl rubber sealant meeting requirements of ASTM C-990. "E-Z stick"and "CPS-210" by PRESS -SEAL GASKET CORP. (1-800-348-7325)meet these ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02720- 1 • requirements. B. Corrugated Metal Pipe: Shall be 14 gauge galvanized corrugated steel pipe that conforms to the requirements of AASHTO M36. C. Poly-Vinyl Chloride: "PVC"pipe and fittings shall conform to the requirements of ASTM D3034 and SDR 26 specifications. Pipe shall have gasketed joints. 2.2 SEWER STRUCTURES: • A. General: Construct structures using precast reinforced concrete to the maximum extent possible in combination with cement,mortar,gaskets,precast adjusting rings,castings, and steps as necessary to complete the structure. Segmental blocks are allowed if use of precast sections is not feasible. B. Concrete: Concrete shall have a minimum compressive strength of 3000 psi at 28 days age and have air content of five to seven percent by volume of concrete.Reference Division 3 of the specifications for further requirements. C. Mortar: Mortar for connections to other drainage structures, and between adjusting rings, or block construction shall conform to ASTM C 270,Type M,except the maximum placement time shall be one hour. 1. The quantity of water in the mixture shall be sufficient to produce a stiff workable mortar but in no case shall exceed 5.0 gallons of water per sack of cement. Water shall be clean and free of harmful acids,alkalies,and organic impurities. The mortar shall be used within 30 minutes after the ingredients are mixed with water. D. Precast Reinforced Concrete Manholes: Shall conform to ASTM C 478 or AASHTO M199. Joints between precast concrete risers and tops joints shall be made with flexible watertight,rubber-type gaskets. E. Precast Concrete Segmental Blocks: Shall conform to ASTM C 139,not more than eight inches thick,not less than 8" long, and of such shape that joints can be sealed effectively and bonded with cement mortar. When segmental blocks or adjusting rings are used,both inside and outside of the structure shall be plastered with mortar. F. Adjusting Rings: Shall be precast and reinforced. Minimum 2,maximum of 6. 2.3 CASTINGS A. Reference sewer schedule and details in the documents.Unless noted otherwise all casting numbers in the documents reference NEENAH FOUNDRY CO. • ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02720-2 2.4 FLARED END SECTIONS A. "Flared End Sections shall be of pipe manufacturers standard design and of the same materials as specified for the pipe. PVC pipe,however,shall use C.M.P. flared end sections. 2.5 OUTLET CONTROL STRUCTURE A. Construction shall be of precast reinforced concrete as detailed. Submit shop drawings for structure. 2.6 FILTER BLANKET A. Provide a 1" minus crushed rock material per ASTM#67 gradation 2.7 TYPE I GEOTEXTILE A. Use a Mirafi Type 140S,or approved equal. 2.8 RIP-RAP A. Provide quarry rock manufactured for use as rip rap;size shall be Class II per MnDOT spec. section 3601. PART 3 EXECUTION 3.1 EXCAVATION,TRENCHING AND BACKFILLING A. This part of pipe installation is covered in Specification Section 02220.Do not proceed without this complementing section. 3.2 ALIGNMENT AND PROFILE A. Curb Alignment: Exact curb locations shall be established by the General Contractor at locations of hydrants,curb inlets,and all other critical locations. B. Sewer Structure Locations: Use curb alignment reference as noted above and the sewer structure details to properly relate the casting to curb inlet. Structures in grass or other noncritical areas not specifically located on plans may be located by scaling from the drawings. C. Sewer line alignment: The minimum separation from water mains shall be 10 feet except where idicated different. All lines shall be straight and intersect the centers of structures. Bends will be allowed only if called for on the plans. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02720-3 D. Profile Control: 1. Place batter boards at least 50 feet on center except that a minimum of three consecutive batter boards shall be set up prior to the installation of any pipe. Grade shall be checked to see that the grade forms a continuous line. If a discrepancy is found in any of the construction stakes,it shall be reported to the A/E immediately, and work shall not proceed until the discrepancy has been corrected. 2. Adjustment of profile elevations will not be permitted without the written consent of the A/E. 3. If a laser is used,the Contractor shall check alignment and grade at 25 feet,50 feet and each station thereafter out of a manhole. 3.3 EXISTING STRUCTURES A. Review the site survey for existing structures at areas of grade change. The contractor shall adjust the top elevation of all existing structures to match new grade at areas of grade change. A maximum of six adjusting rings may be used. B. Field verify,prior to bidding,all existing structures at connection points and at grade adjustment areas to determine the type of construction used and extent of work required to adjust and repair the structures. C. Connect new piping to sewer structures with as small a hole as possible and provide new watertight joint. 3.4 NEW STRUCTURES A. Precast manhole joints shall be made watertight with butyl rubber gasket material or an "O"-ring gasket in accordance with ASTM Designation C-443. B. Place precast concrete bases on a 3" minimum thickness of cast-in-place concrete pour on undisturbed earth or subgrade approved by the Geotechnical Engineer. C. Pour and form inverts inside the structures in a manner that channels the flow and minimizes areas for debris to collect. D. The end of the pipe shall not extend beyond the inside wall of structures except for pipes laid continuously through the manhole in a straight line with the tops removed as described below. E. Wherever possible,the sanitary sewer pipe shall be laid continuously through the manholes. Cut and neatly remove the top portion of pipe to provide a smooth invert,then pour inverts as described above to fill adjacent voids. ADDENDUM#1 1607.001 -ORONO ICE ARENA (CP-2) Page 02720 -4 F. Where precast manhole sections cannot be used,manhole block, solid concrete block,or a combination of such materials may be used. The outside and inside of block structures constructed in the field shall be finished with a minimum of 1/2" of Portland cement grout. Hollow concrete block shall not be allowed for any sewer structure.Method of intended construction shall be clearly shown in the cut sheets and material list submitted. 3.5 LAYING PIPE A. Prior to placing any pipe,verify all inverts at connection points and crossings.This procedure may require independent excavations to expose pipe crossings.If conditions are not as anticipated or result in conflicts contact the A/E office immediately.Allow two weeks for the A/E office to revise profiles. B. Pipes shall be handled in a manner to prevent damage.Maintain a clean pipe interior at all times. C. Lay pipe proceeding upgrade with the spigot ends of bell-and-spigot pipe and tongue ends of tongue-and-groove pipe pointing in the direction of the flow. Maintain accurate control of location and profile. The pipe shall have a uniform slope. D. Before joining pipes,all surfaces shall be clean and dry and have the proper lubricants as recommended by the manufacturer for the joint being used.The joints shall then be placed,fitted and inspected. 3.6 SEWER AND WATERMAIN CROSSINGS A. Watermains crossing house sewers, storm sewers,or sanitary sewers shall be laid to provide a separation of at least 18 inches between the bottom of the watermain and the top • of the sewer. When local conditions prevent a vertical separation as described,the following construction shall be used: 1. Sewers shall be constructed of materials equal to watermain standards of construction. 2. Provide adequate structural support for the sewers to prevent excessive deflection of joints and settling. 3. The length of water pipe shall be centered at the point of crossing so that the joints will be equal distance and as far as possible from the sewer. 3.7 BUILDING CONNECTIONS A. Building connections shall be made to the waste and drainage piping at a point approximately five feet outside the building,unless otherwise indicated.Where building drain piping is not installed,the Contractor shall terminate the building connections approximately 5'from the building at a point agreed to by the General Contractor. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02720 - 5 , 3.8 PLACING ADJUSTING RINGS A. Full bed Mortar is required between rings and between rings/structure and rings/castings. Smooth the interior of the rings inside the manhole to provide a smooth surface approximately 1/2"thick.Provide a"bulb"of concrete outside the rings to maintain a minimum of 4" of concrete cover. B. Sealant option: In lieu of mortar sealant noted above the contractor may use a silicone adhesive,with prior submittals and approvals 3.9 FLARED END SECTIONS A. The last three joints of RCP piping shall use two tie bolt fasteners per joint,installed at 60 degrees from top center of pipe. B. Place flared end section as detailed. 3.10 RIP-RAP A. Subcut and place a type I geotextile over an approved subgrade. B. Place a 12" layer of filter blanket material over the geotextile. C. Hand place Rip-rap over the filter blanket material to the depths and dimensions detailed. 3.11 GENERAL PROCEDURES A. Clean all sewers of silt,debris,and other foreign matter prior to requesting substantial completion site observations. B. Protection: All surface or underground features or structures that are intended to remain shall be properly protected. If damage occurs immediately notify the A/E office. All costs associated with repair and replacement of structures damaged by construction shall be the responsibility of the contractor. • 3.12 TESTS A. All work shall be inspected,tested and approved in accordance with all state and local regulations. Provide the General contractor and A/E office with a detailed schedule of utility work for the purpose of scheduling observations. B. Sewer lines (PVC pipe only)shall be tested for sectional integrity and deflection. A rigid ball or mandrel shall be pulled through the line. The outside diameter of the ball,or mandrel, shall be no less than the 95%of the inside diameter of the pipe being tested. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02720 -6 C. All storm and sanitary sewer lines servicing the building shall be pressure tested at 5 psi for 15 minutes or in accordance with the applicable plumbing code whichever test has greater requirements. D. All storm and sanitary sewer lines servicing parking lot and yard areas shall be pressure tested at 5 psi for 15 minutes or in accordance with the applicable plumbing code,whichever test has greater requirements.The contractor has the option of providing a contract inspector for observation and certification for these lines in lieu of the pressure test noted above. E. The general contractor shall witness and submit the recorded test results to the Owner and Architect/Engineer. END OF SECTION ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02720-7 ' SECTION 02830 CHAIN LINK FENCE PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Chain link fence to the extent shown on the drawings,including posts,rails,bracing, fencing fabric,gates and gate accessories, other accessories,and concrete for post setting. B. Related Sections: 1. Section 03300-Cast-in-Place Concrete. 1.2 QUALITY ASSURANCE A. Standards: Fencing work shall meet or exceed the minimum specifications of the Chain Link Manufacturers Institute. PART 2 PRODUCTS 2.1 MANUFACTURERS A. Type and Manufacturers: Fencing that may conform to the below requirements is made by USS (Cyclone),Page,Anchor Fence,Century,Continental Steel and Crowley Fence Company. 2.2 FENCE A. Height: The fence shall be nominally 8 feet high above grade,using 96 inch high chain link fabric. B. Fabric Use 9 gauge finished size wire in a,1 inch mesh,aluminum coated, conforming to the requirements of ASTM-A491 or hot dip galvanized conforming to the requirements of ASTM-A392 Class 2 coating.Fabric shall be knuckled at the bottom selvage and twisted and barbed at the top selvage. 2.3 FENCE POSTS,GATES AND FITTINGS A. Material: Posts,gate frames,braces,rails,stretcher bars and truss rods shall be zinc coated(hot dip galvanized)in conformance to the requirements of ASTM-A 123-84. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02830- 1 Fittings shall be pressed steel or malleable iron and hot dip galvanized per requirements of ASTM-A 153-82.Tie wires shall be minimum nine gauge aluminum or 11 gauge galvanized steel. B. Posts,gate frames,rails and braces shall conform to dimensions and weights as follows: (NOTE: There shall be no mixing of different type sections on the job; contractor options are allowed as noted below.) 1. Line Posts: Line posts shall be C-Section roll formed from steel conforming to ASTM-A570, 1.70" x 2.25" with minimum bending strength of 314 pounds under a 6 foot cantilever load,or 2-3/8" O.D. standard weight pipe with minimum bending strength of 201 pounds under a 6 foot cantilever load,or High- Strength H Posts 1.70"x 2.25" with a minimum bending strength of 413 pounds under a 6 foot cantilever load. 2. Terminal Posts: All end,corner,gate posts and pull posts shall be roll formed section 3.5" x 3.5" with minimum bending strength of 486 pounds on 6 foot cantiliver load or 2-7/8" O.D. galvanized standard weight pipe with minimum bending strength of 381 pounds on 6 foot cantilever load. Gate posts shall be standard weight pipe of the following sizes for single swing,gates or one leaf of double gates: Leaf Width Gate Post Lbs./Lin.Ft. Up to 6' 3-1/2"x 3-1/2" roll 4.85 formed section or 3" O.D.Pipe 5.79 Over 6'to 13' 4" O.D.Pipe 9.11 Over 13'to 18' 6-5/8" O.D. Pipe 18.97 Over 18' 8-5/8" O.D.Pipe 28.55 3. Top and Brace Rail: Top and brace rails shall be roll formed section of 1.625" x 1.25" channel shaped rail with minimum vertical bending strength of 192 pounds on 10'span or 1.66" O.D.standard weight pipe with minimum vertical bending strength of 202 pounds on 10 foot span. Top rail couplings 6" minimum in length shall be spaced at a maximum of 21'centers and 9 gauge minimum fabric tie wire shall be spaced at 2'maximum centers. C. All fittings shall be pressed steel or malleable iron. D. Gates shall be swing type complete with latches, stops,keepers and hinges. Keepers shall consist of a mechanical device for securing the free end of the gate when in full opening position. ADDENDUM#1 • 1607.001 -ORONO ICE ARENA(CP-2). Page 02830 -2 E. Gate frames shall be 1.90" O.D. schedule 40 pipe welded at each corner.Braces and trusses shall be furnished when necessary. F. Gate fabric to be the same as specified for the fence. G. Post braces shall be used at each gate,corner,pull and end posts. Post brace shall consist of a round tubular brace extending to each adjacent line post at mid-height of fabric,and a truss consisting of a rod not less than 3/8" diameter from the line post back to gate,corner, pull or end posts,with a turnbuckle for adjustment. H. Post tops(ornamental tops)shall be fitted over outside of posts to exclude moisture from tubular posts. I. Stretcher bars shall be made of steel bars 3/16"x 3/4",2" shorter than full height of fabric. Provide where attaching fabric to all terminal posts,threaded through fabric. Stretcher bars shall be provided for each gate,end post and two at each corner and pull post. J. Coil spring galvanized steel tension wire shall be 6 gauge diameter stretched along the bottom of the fence and fastened with 9 gauge diameter galvanized steel hog rings at intervals of 2 feet unless bottom rail is shown in fence detail on plans. K. All dimensions and gauges of material are subject to accepted industry tolerance standards. Any required field touch-up will be in compliance with manufacturer's instructions. Jobsite shall be cleared of excess spoilage of concrete, cut wires,etc.,and post hole excavation shall be disposed of off the limits of the site. L. Upon request of the owner or authorized representative, samples of each component shall be submitted for approval prior to fabrication and shipment of fencing for this project. Mill certificates shall confirm compliance with these specifications and fabrication from domestic produced steel. M. Any material found not to be in compliance with this specification shall be removed and replaced at contractors expense. PART 3 EXECUTION 3.1 POST SETTINGS A. Line and terminal posts to be of sufficient length to allow for approximately 36" settings into concrete footings. Footing diameter to be 10" for line posts and 12" for corner and terminal posts. Line post spacings not to exceed 10'-0" o.c. Concrete footings shall meet requirements for 3,000 psi exterior concrete, Section 03300. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02830-3 3.2 INSTALLATION A. Chain link fabric shall be placed on the outside of the closed fence area. The fabric shall be stretched taut approximately 2" above the ground,and securely fastened to the posts. The fabric shall be cut and each span shall be attached independently at all terminal posts. Fastening to terminal posts shall be with stretcher bars and fabric bands spaced at a maximum of 15 inch intervals. Fastening to line posts shall be with tie wire,metal bands, or other approved method,attached at a maximum of 15" intervals. The top edge of the fabric shall be fastened to the top rail with wire ties at intervals not exceeding 2'. The bottom edge of fabric shall be fastened to the bottom tension wire with wire ties at intervals not exceeding 2'.Rolls of wire fabric shall be joined together by weaving a single strand into the ends of the rolls to form a continuous mesh. B. Attachment of the chain link fabric to roll formed terminals shall be made by weaving directly into integral lock loops formed in the post.Attachment of the chain link fabric to tubular terminal posts shall be made with minimum 1/4" x 3/4"tension bar and 12 gauge x 1" wide clamps using minimum 3/8" diameter carriage bolts. C. Installation shall be by experienced fence erectors. D. Erect to provide straight and plumb installation,with top parallel to finish grade condition beneath fence. END OF SECTION ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02830-4 SECTION 02930 TURF PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Cultivate and till topsoil. 2. Rake and level topsoil. 3. Correct soft spots and irregularities. 4. Fertilizing. 5. Seed and erosion control blanket. 6. Seed and mulch. 7. Maintenance of turf. B. Related Sections: 1. Sections 02200-Earthwork. 2. Section 02931 -Pond Area Seed. 1.2 STANDARD REFERENCE A. Minnesota Department of Transportation, Standard Specifications for Construction;Latest edition,MnDOT Specification. 1.3 QUALITY ASSURANCE A. Utilize mechanical equipment of proper size and in good working condition to prosecute the work to full completion in a satisfactory manner. B. Utilize experienced personnel familiar with equipment, methods and procedures for the job. C. Sampling and testing as specified herein. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02930- 1 PART 2 MATERIALS 2.1 MATERIALS A. Seed shall be a mixture 65A per MnDOT Specification Section 3876.2F. Rate of application shall be 100lbs./acre. B. Mulch material shall be Type 1 per MnDOT Specification Section 38822. Rate of application shall be 2 tons/acre. C. Fertilizer: Composition shall be based on the result of topsoil analysis by soil testing laboratory. Fertilizer shall be mixed as recommended by laboratory,delivered in standard size bags showing weight,analysis and name of manufacturer. Store in a weatherproof place and in such a manner as to keep fertilizer dry with its effectiveness not impaired. D. Erosion Control Blanket: Shall be Category 4 blanket per MnDOT Specification Section 3885.2. PART 3 EXECUTION 3.1 EXAMINATION OF CONDITIONS A. Prior to starting work verify the topsoil thickness,drainage of areas,condition of topsoil and other relevant matters. B. If site conditions appear unsatisfactory,have corrections made by General Contractor before proceeding. Start of turf work indicates satisfaction with site conditions and, therefore,the responsibility for proper results is a part of the work of this section. 3.2 EXTENT OF SEED A. Seed: At all disturbed site areas not subject to other surface treatments. 3.3 METHODS AND PLACING A. Preparation: 1. Cultivate and till topsoil to a minimum depth of 3" until it is uniformly friable. At steep slope areas,tilling shall be done perpendicular to direction of slope. 2. Rake and level to provide topsoil which is smooth,without hollows and has a fine earth surface. 3. Correct soft spots and grade irregularities. 4. Pick up and remove sticks,branches, stones and other debris. ADDENDUM#1 1607.001 -ORONO ICE ARENA (CP-2) Page 02930 -2 5. Where sod is terminated at paved areas,the top of the sod shall be 1/2" above or below abutting paved surfaces,dependent on direction of surface runoff. Where sod is terminated at seeded areas,the top of the sod soil section shall be flush with seed area topsoil. B. Fertilizer: 1. Spread fertilizer by mechanical spreader at rate as recommended by testing laboratory. 2. Mix thoroughly into topsoil. (This work may be done during tilling operation.) • C. Seeding: Seed shallbe sown by means of mechanical spreader at the specified rate of application. The use of hand operated mechanical spreaders will be permitted only on area which are inaccessible to larger equipment. D. Seedbed Firming: All seeded areas shall have the seed bed firmed after seeding and prior to mulching. The soil fuming shall be done with a drag,cultipacker,or other approved soil fuming equipment. Soil firming or seed covering shall be accomplished immediately following seeding. E. Mulching: Mulch at seed areas shall be applied by mechanical blower equipment to a uniform distribution at the specified application rate;approximately 10% of the soil surface should be visible through the mulched areas. Mulch is not required at areas to receive erosion control blanket. F. Erosion Control Blanket: At select seeded areas as identified on the plans,the area shall be covered with specified erosion control blanket within 24 hours after sowing of seed. Blanket placement and staple installation shall be performed in conformance with MnDOT Specification Section 2575.3K2. 3.4 SAMPLING AND TESTING A. Owner shall should retain the services of an independent soils testing laboratory to take 2 soil samples and determine composition of fertilizer to be used. Provide copy of soil testing laboratories recommendation to Architect/Engineer. 3.5 MAINTENANCE AND ACCEPTANCE A. Sod: For acceptance, seeded areas shall present a full,uniform stand of grass, similar to an established healthy lawn,neatly mowed,free of substantial quantities of weeds. Scattered bare spots,none larger than 1 sq.ft.,will be accepted,but such bare spots shall not exceed 1% of any defmable area. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02930 - 3 B. Replacement: 1. Reseed any seeded areas which fail to show a good stand of grass within 4 weeks during the growing season. 2. Reseeding shall be done without additional cost to Owner. C. Maintenance of seeded areas shall continue for a minimum of 60 days or until a healthy stand of grass results and the area is found acceptable. Maintenance shall include,but not be limited to,the following: 1. Water three times weekly or less as required to complement natural precipitation. Depth of wetting may be determined by using a soil probe at several spots throughout the turf. As a guide,expect to irrigate the following quantities of water for the period given: Period Irrigation Needed April 15-30 0.2 inches May 1-15 0.3 inches May 15-30 0.3 inches June 1-15 0.3 inches June 15-30 0.6 inches July 1-15 _ 1.1 inches July 15-31 1.1 inches August 1-15 0.9 inches August 15-31 0.5 inches September 1-15 0.2 inches .• 2. Mow grass until accepted,the last mowing not earlier than five days before acceptance. 3. De-weed areas where an excessive quantity of weeds develop. 4. Re-seed as required to meet desired and intended results of a healthy stand of grass. END OF SECTION ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02930-4 SECTION 02931 POND AREA SEED PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Cultivate and till topsoil and planting soil. 2. Rake and level topsoil and planting soil. 3. Correct irregularities. 4. Debris removal. 5. Seed mixtures as noted. 6. Maintenance of vegetation until established. B. Related Sections: 1. Sections 02200-Finish grading and placing organic topsoil,or similar,as required for seed planting. 1.2 STANDARD REFERENCE A. Minnesota Standard Specifications for Highway Construction,MnDOT. Latest edition. 1.3 QUALITY ASSURANCE A. Utilize mechanical equipment of proper size and in good working condition to prosecute the work to full completion in a satisfactory manner. B. Utilize experienced personnel familiar with equipment, methods and procedures for the job. C. Sampling and testing as specified herein. PART 2 MATERIALS 2.1 MATERIALS A. Pond Edge Seed: Within the comparatively flat area adjacent to the pond edge, seed mixture shall consist of the following seeds mixed in equal proportions: ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02931 - 1 - Giant Reed - Blue Joint - Joe-pye weed - Green Bulrush - Cord Grass Application rate shall be 15 lbs./acre. Local supplier is Prairie Restoration,Inc., Princeton,Minnesota. B. Pond Area Seed: Shall be sown within the wetland mitigation area,and within the pond areas from the pond shoreline to a depth of 12"-14";seed mixture shall consist of the following seeds mixed in approximately equal proportions: - Broad Leaf Cattail - Sweetfiag - Arrowhead - Hummock Sedge - Softstem Bulrush Application rate shall be 12 lbs.per acre. Local supplier is Prairie Restoration,Inc., Princeton,Minnesota. PART 3 EXECUTION 3.1 EXAMINATION OF CONDITIONS A. Prior to starting work verify topsoil thickness,drainage of areas,condition of topsoil and other relevant matters. B. If site conditions appear unsatisfactory,have corrections made by General Contractor before proceeding. Start of seed planting work indicates satisfaction with site conditions and,therefore,the responsibility for proper results is a part of the work of this section. 3.2 EXTENT OF SEED AREAS A. Pond Area Seed: Specified seeds shall be planted throughout the shallow portion of the marsh where the nominal water depth ranges from 0 to 14"; shall also be sown within the wetland mitigation area. B. Pond Edge Seed: Specified seeds shall be planted adjacent to the pond edge forming a perimeter zone extending from the water edge and back approximately 4-5 feet. 3.3 METHODS AND PLACING A. Preparation: ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02931 -2 1. Cultivate and till organic topsoil to a minimum depth of 3" until it is uniformly friable. 2. Rake and level to provide organic topsoil which is smooth,without hollows and has a fine earth surface. 3. Correct soft spots and grade irregularities. 4. Pick up and remove sticks,branches,stones and other debris. B. Seeding: Seed planting methodology shall be by see drill that will accurately meter the type of seedds to be planted and keep al seeds uniformly mixed during drilling. The drill shall be equipped with disk furrow appears and packer assembly to compact the soil directly over the seed row. All drill seeding shall be done at a right angle to surface drainage. The ultimate responsibility for successful growth and coverage is solely the Contractor's;extreme for precipitation or temperature do not constitute a basis for any condition of turf establishment less than the described intent. 3.4 MAINTENANCE AND ACCEPTANCE A. Seed: For acceptance,seeded areas shall present a uniform stand of growth. Scattered bare spots,none larger than one sq. ft.,will be accepted,but such bare spots shall not exceed 1% of any defmable area. B. Maintenance of seeded areas shall continue until a healthy stand of growth results. Maintenance shall include,but not be limited to,the following: 1. At areas adjacent to pond,water three times weekly,unless adequate rainfall has occurred within previous three days. 2. Re-seed as required to meet desired and intended results of healthy growth. C. Pond Area Seed: After seeding within the pond perimeter area is complete,the water level shall be established and maintained at a level 12"below design overflow;the intent is to keep the seed bed wet but not flooded during seed germination and initial growth. Once the marsh vegetation is established,the water level can be progressively raised to design overflow level. Temporary control of the water level below design overflow may require pumping of water during this critical period. END OF SECTION ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02931 - 3 SECTION 02950 PLANTING PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Plants,planting and necessary planting operations including watering and pruning. 2. Replacement of unsatisfactory plant material. 3. Protection,maintenance and guarantee of work. B. Carefully examine all of the Contract Documents for requirements which affect the work of this Section. Other specification sections which directly relate to the work of this section include,but are not limited to,the following: 1. Earthwork: Section 02200. 2. Turf: Section 02930. 3. Pond Area Seed: Section 02931. C. Nursery stock shall comply with the current edition of the American Standard for Nursery Stock,ANSI S60.1,of the American Association of Nurserymen,Incorporated. 1.2 DEFINITIONS A. The term plant shall mean any or all trees, shrubs vines,groundcovers or perennials specified. 1.3 SUBMTTTALS A. Product Data: Submit product data,schedules and certificates in accordance with Section 01300 Submittals. B. Submit work schedule prior to start of work. Include the following: 1. Installation schedule. 2. Plant maintenance and watering schedule. C. Samples: Submit product data and samples of the following: ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02950- 1 1. All mulch products(2 lb.bag). 2. Soil separator mat. 3. Planting soil(5 lb.bag). D. Quality Control Submittals: 1. Submit certificates upon product arrival on site and prior to use or installation. a. Analysis and standards: Deliver standard products with manufacturer's certified analysis. b. For planting soils,provide analysis by recognized laboratory made in accordance with methods established by the Association of Official Agriculture Chemists. c. Nursery stock shall meet the American Standard for Nursery Stock,ANSI S60.1, of the American Association of Nurserymen,Incorporated as to grading and quality. They shall be true to type and name in accordance with Standardized Plant Names,most recent edition. d. Provide healthy,vigorous stock free of disease,insects,eggs,larvae and free of defects such as knots,sun-scale,injuries,abrasions or disfigurement. e. Sizes: Provide plants of sizes shown on Plant Materials Schedule. Plants of larger size may be used if acceptable to Architect. f. Deliver standard products in original package labeled with manufacturer's name, product name,weight,certified analysis and instructions for use. 2. Contractor's Field Reports. Submit monthly report indicating any soil loss,drainage problems,poor maintenance,vandalism,insect damage,disease or any other damage or unhealthy conditions for any plant to Architect. 3. Substantial Completion: a. Submit letter of completion to Architect upon Substantial Completion of work indicating: 1) Finished work. 2) Unmet specifications;explanation. 3) Unfinished work;explanation. 4) Schedule for completion. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02950-2 b. When work is substantially completed and accepted the Architect will supply the Contractor with a Letter of Accepted Completion which may contain provisions the Architect deems necessary to correct. E. Contract Closeout Submittals: 1. Project Record Documents. 2. Plant maintenance manual. F. Warranty: 1. Warranty all plants for a period of one year after date of accepted completion against defects including death and unsatisfactory growth. 2. Remove and replace any plant found to be dead or in the opinion of the Architect unhealthy or of unsatisfactory growth or form during guarantee period. 3. Make replacement during accepted planting season. 4. Each replacement is covered by a one-year warranty from date of installation and is itself subject to replacement. 5. Keep all plants upright and plumb during guarantee period. 1.4 QUALITY ASSURANCE A. Utilize equipment of proper size and in good working condition to prosecute the work to full completion in a satisfactory manner. B. Utilize experienced personnel familiar with the equipment, methods and procedures for the job. 1.5 DELIVERY, STORAGE AND HANDLING A. Packaged Products: 1. Deliver packaged products in original containers showing product name,weight, analysis, instructions for use and name of manufacturer. 2. Protect products from deterioration during delivery and storage on site. B. Planting Soils: 1. Avoid compaction of planting soils during all phases of landscaping unless otherwise noted on drawings. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02950-3 2. Cover stored soils so as to: a. Keep soil free of contamination including construction debris and wind-borne seed. b. Protect soil from rain,wind,runoff and erosion. 3. Ship products with supplier's itemized receipt certifying quantity and quality of products. C. Trees and Shrubs: Provide fresh plants. Do not prune prior to delivery. Do not bend or bind-tie plants in such a manner as to damage bark,break branches or destroy natural shape. Provide protective covering during delivery including tarpaulins over foliage to prevent wind burn. Deliver after preparations for planting have been completed and plant immediately. If planting is delayed more than 6 hours after delivery, set plants in shade, protect from weather and mechanical damage. Keep moist. Do not remove container grown stock from containers until planting time. Label at least one tree and one shrub of each variety with a securely attached metal tag bearing legible designation of botanical and common name. Retain label on one tree and one shrub of each variety after installation. D. Mulch: Deliver mulch on day of initial installation. Protect from deterioration and erosion during delivery and storage on site. Complete installation within 48 hours of product arrival on site. E. Protection: The Contractor shall be responsible for any damage to other areas resulting from planting operations and shall bear the full cost to repair the damage. Accomplishment of repairs shall be equal to the original installation prior to damage. Any damage shall be immediately reported to the Architect and Owner and repairs shall be approved by both. 1.6 PROJECT/SITE CONDITIONS A. Existing Conditions: 1. When any detrimental conditions to plant growth are encountered,such as rubble fill, clay fill,adverse drainage conditions,obstructions, soil contaminants or the like,the Contractor shall notify the Architect before proceeding. 2. Locations of all utilities must be determined by the Contractor prior to beginning work,and all work shall be performed in a manner which will avoid damage to such utilities. B. Field Measurements. Maintain grade stakes set by others until removal is mutually agreed upon by parties concerned. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02950-4 PART 2 PRODUCTS 2.1 MATERIALS A. Planting Soil for Typical Landscaped Areas: Prepared mixture of topsoil and one of the following: 1. 1 part peat moss or well-rotted cattle manure to 4 parts topsoil. 2. If above is not available: 5 pounds 10-6-4 commercial fertilizer per cubic yard of topsoil,to which will be added 1 part peat moss to 5 parts topsoil. a. Commercial Fertilizer. Delivered to the site in unopened containers,each bearing manufacturer's guaranteed analysis. b. Peat Moss: Sphagnum type,4.5 pH,fully warranted by producer. Peat moss shall be delivered to the site in air dry condition. B. Planting Soil for Woodland Restoration Areas: Homogenous mixture of 50%topsoil and 50%existing(native)soil. C. Topsoil: Topsoil used in the preparation of planting soils shall be as specified in Section 02210. D. Mulch: Shredded 100%hardwood bark mulch,free of debris. E. Soil Separator Mat: Typar Landscape Fabric by Reemay,Inc.,Old Hickory,TN or approved equal. F. Fertilizers shall be as follows: 1. Manure: Well rotted mushroom or cattle manure,free of wood shavings, sawdust or other undesirable litter and contains no chemicals or other ingredients harmful to plants. 2. Organic fertilizer: Organic activated fertilizer containing the following: a. Five percent nitrogen. b. Three percent phosphoric acid. c. Other basic elements by weights. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02950-5 3. Commercial Fertilizer: Complete fertilizer,part which is derived from organic sources. Determine formula from soil analysis. For bidding assume the following: a. Trees and Shrubs: Fall or Summer Planting: Apply 0-20-20 at 12 oz.per 2" - 3" caliper tree and larger,and 6 oz. on shrubs or small trees Spring Planting: Apply 0-10-10 at similar rates. 4. Fertilizer shall be delivered mixed as specified in standard size bags, showing weights, analysis and name of manufacturer and shall be stored in a weatherproof storage place in such manner that it will be kept dry and its effectiveness not impaired. 5. The Architect reserves the right to vary the percentages of the components of the fertilizers subject to the results of the soil fertility tests. 2.2 PLANT MATERIAL STANDARDS A. Names and Grades: Plant material shall conform to nomenclature of"Standardized Plant Names"as adopted by the Joint Committee of Horticulture Nomenclature,latest edition. Size and grading standards shall conform to the American Association of Nurserymen, Inc.,as published in "American Standard for Nursery Stocks," latest edition. No substitutions of size or grade shall be permitted without written permission of the Architect. Each bundle of plants and all separate plants shall be properly identified with legible waterproof tags securely fastened to each plant or bundle of plants. B. Form: Well formed for the species or variety. C. Health: All plants including their roots shall be free from disease,insects,or other injurious qualities. Contractor shall comply with all local, State and Federal laws pertaining to the inspection,sale,and shipment of plant materials. Plants shall show good annual growth. Buds shall be plump and well filled for the species. All plants shall be nursery grown unless otherwise indicated on the drawings or elsewhere in these specifications. They shall have been growing in similar climatic conditions as the location of the project for at least two years prior to the date of this contract. D. Plant Materials Schedule: The list of plants furnished on the drawings is for the information of the Contractor. The height and spread of shrubs are the minimum dimensions required. 1. All plants shall conform to the measurements specified in the Plant Materials Schedule on the drawings,except that plants larger than specified may be used if approved by the Architect. Use of such plants shall not increase the contract price. If larger plants are approved,the root ball shall be increased in proportion to the size of the plant according to ASNS Standards. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02950-6 2. Quantities of plant material shown in the Plant Materials Schedule do not necessarily represent the total numbers of plants that will be required. The Contractor shall make his/her own takeoff from the drawings and determine the quantities of each plant necessary to complete the work. E. Water: The Contractor shall make,at his/her expense,whatever arrangements may be necessary to ensure an adequate supply of water to complete the work as specified. 1. Furnish all necessary hose,equipment,attachments,and accessories for the adequate irrigation of lawns and planted areas as may be required to complete the work as specified. 2.3 SOURCE QUALITY CONTROL A. Inspection: 1. Plants shall be subject to inspection and approval by the Architect at place of growth, and upon delivery for conformity with project specifications as to quality,size and variety. Such approval shall not impair the right of inspection and rejection upon delivery at the project site or during the progress of the work for size and condition of balls or roots,diseases,insects,and latent defects or injuries. The Contractor shall remove rejected plants immediately from the project site. 2. The Contractor shall be responsible for all inspection and approval of plant material that may be required by State,Federal and other authorities and shall secure any permits and certificates that may be required. 3. Any inspection certificates required by law shall be filed with the Architect. B. Verification of Performance 1. General: Ship soil and amendments as specified with suppliers receipt certifying proportions and quality. 2. Substitutions: If a specified product is not obtainable,submit to the Architect proof of non-availability and a recommendation for use of equivalent material. 3. No plants other than the required samples shall be dug or delivered to the site until the required inspections have been made and the plants or samples are approved. PART 3 EXECUTION 3.1 EXAMINATION A. The Contractor shall verify that all existing conditions and proposed conditions by other disciplines are as shown on the drawings. Inform the Architect if discrepancies are found. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02950-7 3.2 PREPARATION A. Roots or balls of all plants shall be adequately protected at all times from sun and/or drying winds. Balled and burlapped plants that cannot be planted shall immediately upon delivery,be set on unfrozen ground and well protected with soil,wet peat moss or other acceptable material. Bare rooted plants shall be planted or heeled-in immediately upon delivery. B. No plant shall be bound with wire or rope at any time so as to damage the bark or break branches. Failure to do so will require removal and replacement at the Contractor's expense. 3.3 PLANTING A. Unless specified otherwise or noted on the drawings,planting pits shall be essentially circular with a diameter greater than the diameter of the ball or pot. All plants shall be placed at a level the same as the original grade at which the plant grew. B. Remove twine from base of trunk and cut or peel back burlap at top 1/3 of rootball prior to fmal backfilling. C. Planting at parking islands and other contained planting areas,shall include planting soil from curb to curb,or pavement to pavement,as the case may be. D. Planting along north side and northeast corner of building is a woodland restoration intended to match existing stand of trees on the other side of Medina Road(100 yards west). Relatively close and irregular spacing is appropriate. 3.4 GROUNDCOVER PLANTING A. Contractor shall adhere to the number and spacing of groundcover plants designated in the Plant Materials Schedule. Number of groundcover plants designated in the Plant Material Schedule will not necessarily cover all mulched planting areas. Contractor shall use best professional judgement to determine which areas are to be given highest priority in terms of coverage,with the understanding that front edge of planting areas,(i.e.those areas most visible)are to receive highest priority. Areas beneath shrubs,and areas behind shrubs,are to be given the lowest priority. 3.5 PRUNING AND SHEARING A. Prune,at the time of planting,to remove all dead wood, suckers and broken or badly damaged branches. Prune to preserve the natural form and character in a manner appropriate to each plants particular requirements. All pruning shall be clean and smooth, leaving branch collar with bark intact and uninjured at the edges. Pruning shall be done with sharp,clean tools appropriate for the task,as per standard practice. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02950- 8 B. Shear hedges as appropriate if plant sizes are adequate. Otherwise,include shearing • instructions to Owner as part of required maintenance instructions. 3.6 MULCH AND SOIL SEPARATOR MAT A. Mulch shall be applied to all shrub planting beds to a minimum depth of 3" and a maximum depth of 4". Mulch shall be underlaid with a soil separator mat where noted on drawings. The mat shall have a 6" minimum overlap wherever edges join. Mat shall be cut as close as possible around plants and then pinned. 3.7 TEMPORARY STORAGE AND HEELING-IN A. When temporary storage or heeling-in is required,the Contractor shall provide and prepare a suitable heeling ground or heeling-in nursery conveniently located near the planting site prior to the shipment of the plant material from the growing nursery or other source. B. Plant material unloaded and accepted by the Architect shall be immediately heeled-in or transported to the planting site and planted.Material left out of ground overnight or left with its roots bared to the sun,or otherwise unprotected during transit,unloading, or storage shall be rejected by the Architect,if such lack of protection has caused damage to the roots of the plant or in any other way injured the plant material. At all times, Contractor shall keep plant roots adequately moist,and take other measures as necessary to prevent stress to plants. 3.8 MAINTENANCE A. Provide a thorough watering of all plants immediately after planting. Thorough waterings shall occur once weekly to supplement natural rainfall.Watering shall continue for 60 days for all plants. Maintenance of plants will be the responsibility of the Owner after 60 days.The Contractor shall make periodic checks of all plantings during the full length of the guarantee period to make certain that the plants are properly cared for and that the sum of all conditions are contributing to the satisfactory progress of the plants. B. Prune,water,cultivate and weed,during maintenance period as required for healthy growth. Reset plants to proper grades or vertical position as required. Spray as required to keep plants free of insects and disease. Notify Architect and Owner of any disease or infestation and provide an appropriate treatment plan to be implemented as a restorative measure. C. Maintenance Instructions: The Contractor shall submit typewritten instructions describing procedures to be established by the Owner for maintenance of landscape work during the guarantee period and beyond. Submit instructions prior to expiration of required maintenance periods. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02950-9 3.9 INSPECTION AND ACCEPTANCE A. Work will be subject to inspection at all times by the Architect. The Owner reserves the right to engage an independent testing laboratory to analyze and test materials used in the construction of the work. Where directed by the Architect,the testing laboratory will make material analyses and will report to the Architect whether materials conform to the requirements of these specifications. 1. Cost of tests and material analyses made by the testing laboratory will be borne by the Owner when they indicate compliance with the specification,and by the Contractor when they indicate non-compliance. B. Inspection of the work will be made by the Architect at the conclusion of the planting period. Contractor shall request an inspection at least five days prior to the desired date. Condition of plants will be noted and recorded for reference at end of guarantee period. C. After inspection,the Contractor will be notified in writing by the Architect if there are any deficiencies of the requirements for acceptance of the work. D. Clean-Up: 1. Any soil,manure,peat,mulch,branches or similar material which has been brought onto paved areas by hauling operations or otherwise shall be removed promptly, keeping the area clean at all times. Upon completion of the planting,all excess soils, stones,and debris which have not previously been cleaned up shall be removed from the site or disposed of. 2. All ground areas disturbed as a result of planting operations shall be restored to their original condition or to the desired new appearance. 3.10 GUARANTEE AND REPLACEMENT A. Contractor shall guarantee all plants for a period of one year after date of Substantial Completion,against defects including death and unsatisfactory growth,but excepting defects resulting from neglect by Owner,abuse or damage by others,or unusual phenomena or incidents which are entirely beyond Contractor's control. B. Contractor shall inspect all beds on at least a monthly basis during the guarantee period. Report any soil loss,drainage problems,poor maintenance,vandalism, insect damage, disease or any other damage or unhealthy condition to Architect. By failing to report any condition which leads to the damage or death of a plant,the Contractor forfeits any claim of non-responsibility. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 02950- 10 C. Contractor shall remove and replace shrubs found to be dead or in unhealthy condition during the guarantee period. Make replacements immediately or during the next growth season as appropriate. 1. All replacements shall be plants of the same kind and size as specified in the Plant Materials Schedule. Replacement costs shall be borne by the Contractor. 2. Each replacement planting required at the end of the guaranty period shall be guaranteed for one year from date of installation,and itself is subject to replacement and guarantee. Replacement plants are subject to inspection and rejection by the Architect before and after planting. D. Inspection: At the end of the guarantee period,inspection will be made by the Architect upon written notice by the Contractor at least five days prior to the end of the guarantee period. Any shrub required under this contract that is dead or not in satisfactory condition,as determined by the Architect shall be removed from the site,and shall be replaced as soon as conditions permit during the planting season. END OF SECTION ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 02950- 11 SECTION 03100 CONCRETE FORMWORK PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Responsibility for design,engineering,construction,maintenance and safety of removable formwork. 2. Formwork required for cast-in-place concrete,with shoring,bracing and anchorage. 3. Items, materials,operations and methods including labor,equipment and incidentals. 4. Coordinate installation of items furnished under other sections. B. Related Sections: 1. Section 03200-Concrete Reinforcement 2. Section 03250-Concrete Accessories 3. Section 03300-Cast-in-Place Concrete 1.2 . REFERENCES A. Removable Forms: 1. ACI 301 -Specification for Structural Concrete for Buildings. 2. ACI 318 -Building Code Requirements for Reinforced Concrete. 3. ACI 347 -Recommended Practice for Concrete Formwork. 4. PS 1 -Construction and Industrial Plywood. 1.3 QUALITY ASSURANCE A. Applicable Standards: ACI 347 "Recommended Practice for Concrete Formwork"and ACI 301 "Specifications for Structural Concrete for Buildings",Chapter 4. B. Allowable Tolerances: Design, construct and maintain formwork to insure completed work within tolerance limits specified in Table 4.3.1 of ACI 301 and Article 3.3 of ACI 347 with stipulation that no tolerances specified for horizontal or vertical building lines or footings should be construed to permit encroachment beyond legal boundaries. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03100- 1 PART 2 PRODUCTS 2.1 REMOVABLE FORMS A. Forms for Unexposed Finish Concrete: Form concrete surfaces which will be unexposed in finished structure with plywood,lumber,metal or other acceptable material. Provide lumber dressed on at least 2 edges and one side for tight fit. B. Backing for Forms: Structurally sound lumber,solid, straight and free of defects that may impair its strength. C. Forms for Exposed Finish Concrete: Construct formwork for exposed concrete surfaces with plywood,metal,metal-framed plywood faced or other acceptable panel-type materials,to provide continuous,straight,smooth,exposed surfaces. Furnish in largest practicable sizes to minimize number of joints and to conform to joint system shown on drawings. Provide form material with sufficient thickness to withstand pressure of newly- placed concrete without bow or deflection. Form corners with 3/4 inch by 3/4 inch chamfer strips,mitered at changes in direction. 2.2 ACCESSORIES FOR REMOVABLE FORMS A. Form Ties: Factory-fabricated,adjustable-length,removable or snap-off metal form ties, adequate to prevent form deflection,and to prevent spoiling concrete surfaces upon removal. Provide ties so that portion remaining within concrete after removal of exterior parts is at least 1 inch from outer concrete surface. Spreader cones on ties shall not be larger than 1 inch in diameter. At exposed finish concrete provide form ties with plastic cones and plastic setback plugs,color as selected,with equal spacing in horizontal and vertical line. B. Chamfer and Reveal or Recess Strips: PVC or wood strips. Triangular chamfer strips shall be 3/4 inch by 3/4 inch. Round chamfer strips shall have 3/4 inch radius. Size reveal or recess strips as noted. Wood strips shall have planed faces. C. Form Coatings: Form-coating compounds that will not bond with,stain,nor adversely affect concrete surfaces,and will not impair subsequent treatment of surfaces requiring bond or adhesion,nor impede wetting of surfaces to be cured with water or curing compounds. PART 3 EXECUTION 3.1 DESIGN A. Removable Forms: Design for vertical and lateral loads and pressures outlined in the ACI Standard"Recommended Practice for Concrete Formwork" (ACI 347). B. Tolerances: Design removable forms to insure completed work within allowable tolerances specified. ADDENDUM#1 1607.001 -ORONO ICE ARENA (CP-2) Page 03100-2 C. Openings: Design formwork with temporary openings at locations as required for inspections and to permit removal of extraneous materials before placing concrete. D. Removal: Design forms for safety in removal and in proper sequence without damage to concrete. Provide removable side forms for beams and slabs to enable removal without disturbing bottom forms or shoring beneath them. E. Camber: Design camber in formwork to compensate for anticipated deflections due to weight and pressure of fresh concrete and construction loads. F. Adjustment: Design positive means of adjustment(wedges or jacks)for shores and struts to correct settlements or facilitate dismantling of formwork. G. Foundation: Design satisfactory foundations for formwork supported on ground to carry loads imposed during construction,without appreciable settlement. H. Joints: Design with minimum number of joints and with joints sufficiently tight to prevent leakage of grout or cement paste. 3.2 ERECTION OF REMOVABLE FORMS A. Verify lines,levels,measurements,elevation and center locations before proceeding with formwork. B. Construct forms to conform to sizes, shapes,lines and dimensions of members,true to line,plumb and level. Provide bracing to insure stability of formwork. C. Provide for openings,offsets,keyways,recesses,moldings,rustications,reglets,chamfers, blocking,screeds,bulkheads,anchorages,inserts and other features required. D. Construct forms of materials selected to obtain required finishes. E. Provide crush plates or wrecking plates where stripping may damage cast concrete surfaces. F. Provide top forms for inclined surfaces where slope is too steep to place concrete with bottom forms only. G. Kerf wood inserts used for forming keyways,recesses,and similar features to prevent swelling and assure ease of removal. H. Locate temporary openings in forms as inconspicuous as possible,consistent with project requirements. Brace closures and set tightly to forms to prevent loss of concrete mortar. I. Provide permanent openings in forms where shown or required to accommodate other work,including Mechanical and Electrical Work. ADDENDUM#1 1607.001 -ORONO ICE ARENA (CP-2) Page 03100-3 J. Accurately place and securely support items required to be built into forms. Set and build into work anchorage devices and other embedded items required for other work that is attached to,or supported by,cast-in-place concrete. Use setting drawings, diagrams, instructions and directions provided by suppliers of items to be attached thereto. Install waterstops continuous without displacing reinforcing. Provide continuity in waterstops by making fused butt splice using heating element specifically designed for that purpose. K. Erect and support,brace and maintain falsework to safely support vertical,lateral,and asymmetrical loads and forces until they can be supported by in-place concrete structures. L. Set edge forms or bulkheads and intermediate screed strips for slabs to obtain required elevations and contours in finished slab surfaces. Provide and secure units to support types of screeds required. M. Protect forms from deterioration,weather, and shrinkage prior to concreting by proper oiling or wetting. N. Coat form contact surfaces with non-staining,form-coating compound before reinforcement is placed. Do not allow excess form coating material to accumulate in forms or come into contact with surfaces which will be bonded to fresh concrete. Apply in compliance with manufacturer's instructions. O. For exposed concrete,drill forms to suit approved ties and spacings and to prevent leakage of mortar around tie holes. Do not splinter forms by driving ties through improperly prepared holes. P. For exposed concrete,do not use metal cover plates to patch holes or defects in forms. Q. At intersecting planes provide sharp,clean corners without visible edges or offsets and back joints with extra studs or girts to maintain true,square intersections. R. Form exposed corners of beams and columns to produce square,smooth unbroken lines, unless they are shown to be bevelled or rounded. S. Exposed beveled corners shall be 3/4 inch by 3/4 inch and rounded corners shall be 3/4 inch radius,unless otherwise shown. Accurately form and surface corners to produce straight lines and tight edge joints. Extend terminal edges to required limit and miter strips at changes in direction. T. Unexposed corners may be formed square,bevelled or rounded. U. At changes in plane,form molding shapes,recesses and projections with smooth-finish materials, and install in forms with sealed joints to prevent displacement. V. Thoroughly clean forms and adjacent surfaces to receive concrete. Remove chips,wood, sawdust, dirt or other debris before concrete is placed.During cold weather be sure that ice and snow has been removed. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03100-4 W. Retighten forms, if necessary,immediately after concrete is placed to eliminate mortar leaks. Carefully inspect falsework and formwork during and after concrete placement operations to determine abnormal deflections or signs of possible failure and make necessary adjustments to produce work of required dimensions. X. Clean,inspect and repair reusable forms thoroughly,if necessary,before each use. Do not use "patched" forms for exposed concrete surfaces,except as acceptable to Architect. Y. Do not displace or damage moisture barrier. 3.3 FIELD QUALITY CONTROL A. Inspection is subject to compliance with requirements affecting finish results only. Adequacy of formwork and shores to support necessary vertical and lateral loads and pressures is sole responsibility of Contractor. 3.4 APPLICATION OF FORM RELEASE AGENT A. Apply form release agent on formwork in accordance with manufacturer's instructions. Apply prior to placing reinforcing steel,anchoring devices,and embedded items. B. Do not apply form release agent where concrete surfaces are scheduled to receive special finishes or applied coverings which may be affected by agent. Soak contact surfaces of untreated forms with clean water. Keep surfaces wet prior to placing concrete. C. Do not apply form release agent where wood graining characteristics are required on finished concrete surfaces. Leave formwork dry. 3.5 FORM REMOVAL A. Do not remove forms, shores and bracing until concrete has gained sufficient strength to carry its own weight, and construction and design loads which are liable to be imposed upon them. Verify strength of concrete by compressive test results. B. Remove formwork progressively and in accordance with code requirements so that no shock loads or unbalanced loads are imposed on structure. C. Loosen forms carefully. Do not wedge pry bars,hammers,or tools against concrete surfaces. D. Store removed forms used for exposed architectural concrete in manner that surfaces to be in contact with fresh concrete will not be damaged. Do not use marked or scored forms. E. Remove forms not directly supporting weight of concrete as soon as stripping operations will not damage concrete. END OF DOCUMENT ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 03100 -5 SECTION 03200 CONCRETE REINFORCEMENT PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Reinforcing bars for cast-in-place concrete. 2. Smooth bar dowels for concrete slab joints. 3. Ties and supports for reinforcement. 4. Collated fibrillated polypropylene fibers(fiber reinforcement)in topping and interior slabs on grade. B. Related Sections: 1. Section 03100-Concrete Formwork. 2. Section 03250-Concrete Accessories. 3. Section 03300-Cast-in-Place Concrete. 4. Section 03412-Precast Concrete Deck: Reinforcement for precast concrete decking. 5. Section 04150-Masonry Accessories: Masonry reinforcement. 1.2 REFERENCES A. ACI 315 -Manual of Standard Practice for Detailing Reinforced Concrete Structures. B. ACI 318 -Building Code Requirements for Reinforced Concrete. C. ACI 544-Fiber Reinforced Concrete. D. ASTM A185 -Welded Steel Wire Fabric for Concrete Reinforcement. E. ASTM A615 - Specification for Deformed and Plain Billet Steel Bars for Concrete Reinforcement. F. ASTM A706- Specification for Low-Alloy Steel Deformed Bars for Concrete Reinforcement. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03200 - 1 G. ASTM A775 - Specification for Epoxy-Coated Reinforcing Steel Bars. H. AWS D1.4- Structural Welding Code Reinforcing Steel. I. CRSI-Manual of Standard Practice. J. CRSI-Placing Reinforcing Bars, 5th Edition. K. U.B.C. Standard No. 26-4 Deformed Reinforcing Bars. L. U.B.C. Standard No.26-6 Wire Fabric for Concrete Reinforcing. 1.3 SHOP DRAWINGS A. Shop Drawings: Submit in accordance with Section 01300. B. List and mark bars showing quantities,sizes,lengths,locations,bending details and ASTM designations. C. Show locations,type and quantities of bolsters, spacers,chairs,support bars and other accessories. D. Show concrete cover dimension from face of form to reinforcing bars. 1.4 QUALITY ASSURANCE A. Perform concrete reinforcing work in accordance with Concrete Reinforcing Steel Institute's recommended practices. B. Materials shall be new,free of rust,loose scale or other coating that would reduce or destroy bond. C. Deliver reinforcement bundled,tagged and marked. Use metal tags indicating bar size, lengths,and other information corresponding to markings shown on placement diagrams. D. Store reinforcement to prevent damage and accumulation of dirt or excessive rust. E. Allow Architect to observe reinforcing steel in place prior to pouring of concrete for each section. F. Do not pour concrete until permission to proceed with placement of concrete has been granted by Architect. G. Notify Architect sufficiently in advance of scheduled time for pouring of concrete to allow observation to be made and corrections or adjustments completed,where required. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03200-2 H. At fiber reinforced concrete mix design,include fiber manufacturers name,fiber type, fiber size,rate of application and recommendations for batch plant application of fibers into concrete mix. PART 2 PRODUCTS 2.1 REINFORCING A. Reinforcing Steel: ASTM A615,Grade 60. B. Epoxy Coated Reinforcing Steel: ASTM A775. C. Reinforcing Steel to be Welded: ASTM A706. D. Welded Steel Wire Fabric: ASTM A185. E. Smooth Bar Dowels: AASHTO M31,Grade 40 or 60,plain round bars. F. Collated Fibrillated Polyproplyene Fibers: Fibermesh by Fibermesh Inc.,Forta CR by Forta Corporation,or Grace Fibers by W.R. Grace&Co. 2.2 ACCESSORY MATERIALS A. Wire Bar Type Supports: CRSI B. Supports: For slabs-on-grade with steel reinforcement use supports with sand plates or horizontal runners where base materials will not support chair legs. C. Plastic-Tipped or Stainless Steel Legs: Use for exposed-to-view concrete surfaces,or where concrete surfaces will be exposed to weather where legs of supports are in contact with forms. Hot dip galvanized support accessories may be used against formed surfaces not exposed to view or to weather. D. Precast Concrete Chairs: Use over membrane waterproofmg or moisture barrier to prevent penetration of membrane or barrier. E. Epoxy-Coated Supports and Tie Wire: Use with epoxy-coated steel reinforcing. F. Epoxy-Coated Steel Reinforcing Touch-up Coating: 3M Scotchkote 213PC. 2.3 FABRICATION A. Fabricate steel reinforcement in accordance with ACI 315 and reviewed shop drawings. B. Do not re-bend or straighten steel reinforcement in manner that will injure or weaken material. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03200-3 PART 3 EXECUTION 3.1 INSTALLATION A. Clean steel reinforcement to remove loose rust and mill scale,earth,ice and other foreign materials which will reduce or destroy bond with concrete. B. Install concrete reinforcement in accordance with reviewed shop drawings and CRSI recommended practices. Do not displace or damage moisture barrier. C. Position,support,and secure steel reinforcement against displacement by formwork, construction,or concrete placement operations. D. Locate and support steel reinforcing by metal bolsters,spacers,chairs and hangers. Securely tie bars and supports together with 16 gauge wire to hold steel reinforcement accurately in position during concrete placement operations. Set wire ties so that twisted ends are directed away from concrete surfaces. E. Provide bar supports in sufficient number and heavy enough to carry steel they support. Place no bar more than 2 inches beyond last leg of continuous bar support. Do not use bar supports to support runways for concrete buggies, or similar loads. F. Steel reinforcement partially embedded in concrete shall not be field bent,except as indicated or permitted by Architect. G. For walls reinforced on both faces,provide spreader bars and chairs to surfaces of forms on each side at spacings not to exceed 8 feet in either direction.For walls with single layer of reinforcing,provide chairs each side at spacings not to exceed 8 feet in either direction. H. Splice bars only where shown or noted. Comply with requirements of ACI 318 for minimum lap of bars,unless noted otherwise. Weld splices in bars larger than#11,or where#11 bars are spliced to larger size bars. Comply with requirements of AWS D1.4 for welding of bars. I. Install smooth bar dowels in concrete slab joints where shown. Center dowels on joint, positioned at center of slab depth and aligned perpendicular to face of joint both vertically and horizontally. Within 30 minutes of placement of adjacent concrete along doweled joints apply thin uniform coating of liquid asphalt MC-250 or road tar RT-6 on free ends of dowels. J. Exposed reinforcing steel after concrete has been placed,indicating steel is not properly located,will be sufficient cause for rejection,removal and replacement of concrete section. K. Apply fiber reinforcing in accordance with manufacturers recommendations. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03200-4 L. At fiber reinforced concrete provide required concrete tests according to manufacturers recommendations. M. Externally vibrate reinforced concrete test specimens,per ACI Committee 544. Do not internally vibrate. END OF DOCUMENT ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 03200- 5 SECTION 03250 CONCRETE ACCESSORIES PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Concrete accessories and related materials for cast-in-place concrete. 2. Coordinate work in this section with requirements of Section 03100 and 03300. B. Related Sections: 1. Section 03100-Concrete Formwork 2. Section 03200-Concrete Reinforcement 3. Section 03300-Cast-in-Place Concrete 4. Section 07900-Joint Sealers 5. Section 09880-Protective Coatings: Protective sealers for concrete surfaces. 1.2 REFERENCES A. ASTM D1751 -Preformed Expansion Joint Fillers for Concrete Paving and Structural Concrete. PART 2 PRODUCTS 2.1 MATERIALS A. Expansion Joint Fillers (Non-Sealed): Resilient non-extruding premolded bituminous impregnated fiberboard complying with ASTM D1751. Brock-White,North Central Construction Supply, or W.R.Meadows. B. Expansion Joint Fillers (Backing for Sealant): Flexible,compressible,closed-cell polyethylene foam,not less than 10 psi compression deflection. C. Waterstops: Waterstop-Plus by Effective Building Products or extruded polyvinyl chloride, complying with Corps of Engineers Specification CRD C-572 4 inch wide, ribbed split flange with center bulb,by Vinylex Corporation,W.R. Meadows,Sonneborn Building Products,or W.R.Grace. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 03250- 1 D. Moisture Barrier: 6-mil polyethylene film complying with ASTM E154. E. Aggregate for Slip-Resistant Finish: Aluminum oxide abrasive grits,50 percent aluminum oxide content,Frictex by Sonnebom Building Products,Toxgrip by Toch- Carboline,Grip It by L&M Construction Chemicals,or Nonslip by Euclid Chemical, factory-graded,rustproof and non-glazing,unaffected by freezing, moisture and cleaning materials. F. Dovetail Anchor Slots: Gateway Beehive Slot,Heckmann Building Products No. 100. Fabricate from not lighter than 24 gauge galvanized steel with 1 inch wide back by 1 inch deep with 5/8 inch throat. Nail holes 4 inch o.c. Provide complete with fibrous, waterproof slot sealer or removable foam slot filler. G. Expansion Sleeves: Where reinforcing extends from concrete mass to support adjacent slab,with provisions for expansion required,provide metal sleeve at each bar to permit movement. Provide at stoops and elsewhere as indicated. H. Slab Joint Key: Preformed asphalt hardboard,tongue and groove joint, 1/4 inch thick,by Brock-White or W.R.Meadows. I. Reglets: Form reglets in concrete exposed to weather(for membranes, flashing and similar items),with removable forms (inserts),not with metal reglets,except where specifically approved. Form reglets,wedge-shaped to preserve sharp edges of concrete with twice material thickness,but not less than 3/8 inch. For concealed reglets use 24- gauge galvanized metal flashing reglet#307 by Hohmann-Barnard,Gateway or Heckman. J. Dowel Caps: Plastic material of size recommended for rod diameter. K. Non-residual Curing Compounds: L&M Cure by L&M Construction Chemicals, Sonosil by Sonnebom or Cure Hard by W.R.Meadows. To be used at contractor's option in lieu of moist cure in accordance with ACI 301,Chapter 12,for floors to receive tile work, toppings,liquid applied waterproofmg,synthetic flooring or other surface treatments for which bonding could be impaired by surface residue. Apply in accordance with manufacturer's recommendations and at coverage rate meeting ASTM C309 as demonstrated by independent laboratory tests. L. Concrete Curing/Sealing Compounds: Liquid acrylic based, minimum of 30 percent non- yellowing membrane forming compound conforming to TTC-800A. Kure-N-Seal#30 by Sonnebom Building Products,Master Kure by Master Builders,Dress &Seal#30 by L&M Construction Chemicals,Super Rez-Seal by Euclid Chemical. To be used as means of curing in accordance with ACI 301, Chapter 12,only for floors to remain bare or where surface treatments are compatible. Apply in accordance with manufacturer's recommendations. For floors to remain bare such as mechanical or utility rooms thoroughly clean surface and apply additional roller application just prior to project completion. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03250-2 PART 3 EXECUTION 3.1 INSTALLATION A. Install concrete accessories and related materials as specified in Section 03100-Concrete Formwork and Section 03300-Cast-in-Place Concrete. END OF SECTION • ADDENDUM#1 1607.001 - ORONO ICE ARENA (CP-2) Page 03250- 3 SECTION 03300 CAST-IN-PLACE CONCRETE PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Cast-in-place concrete, cement,aggregates,water and admixtures. 2. Proportioning,mixing,conveying,placing, finishing,curing,and testing of cast-in- place concrete. 3. Installation of concrete accessories for cast-in-place concrete. 4. Coordinate installation of embedded items furnished and installed under other sections. 5. Precast concrete items. B. Related Sections: 1. Section 03100- Concrete Formwork. 2. Section 03200-Concrete Reinforcement. 3. Section 03250-Concrete Accessories. 4. Section 07900-Joint Sealers. 5. Section 04100-Mortar and Masonry Grout: Masonry corefill concrete. 1.2 REFERENCES A. ACI 214-Recommended Practice for Evaluation of Compression Test Results of Field Concrete. B. ACI 301 - Specifications for Structural Concrete for Buildings. C. ACI 304-Recommended Practice for Measuring,Mixing,Transporting and Placing Concrete. D. ACI 305 -Hot Weather Concreting. E. ACI 306 -Cold Weather Concreting. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03300- 1 F. ACI 309 - Standard Practice for Consolidation of Concrete. G. ACI 318 -Building Code Requirements for Reinforced Concrete. H. ASTM C31 -Methods of Making and Curing Concrete Test Specimens in the Field. I. ASTM C33 - Specifications for Concrete Aggregates. J. ASTM C39 -Test Method for Compressive Strength of Cylindrical Concrete Specimens. K. ASTM C88 -Test Method for Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate. L. ASTM C94- Specifications for Ready-Mixed Concrete. M. ASTM C131 -Test Method for Resistance for Degradation of Small Size Coarse Aggregate. N. ASTM C143 -Test Method for Slump of Portland Cement Concrete. O. ASTM C150- Specifications for Portland Cement. P. ASTM C172-Method of Sampling Fresh Concrete. Q. ASTM C173 -Test Method for Air Content of Freshly Mixed Concrete by Volumetric Method. R. ASTM C227 -Test Method for Potential Alkali Reactivity of Cement-Aggregate Combinations(Mortar-Bar Method). S. ASTM C231 -Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method. T. ASTM C260- Specifications for Air Entraining Admixtures for Concrete. U. ASTM C404-Specification for Aggregates for Masonry Grout. V. ASTM C494- Specifications for Chemical Admixtures for Concrete. W. ASTM C618 -Specifications for Fly Ash and Raw or Calcined Natural Pozzolan for Use as Mineral Admixture in Portland Cement Concrete. X. ASTM E329 -Recommended Practice for Inspection and Testing Agencies for Concrete, Steel and Bituminous Materials as Used in Construction. ADDENDUM#1 1607.001 -ORONO ICE ARENA (CP-2) Page 03300-2 Y. ASTM El 155M- Standard Test Method for Determining Floor Flatness and Levelness Using the F Number System(Metric). 1.3 QUALITY ASSURANCE A. Use plant mixed concrete mixed in stationary mixers. B. Mix and deliver concrete in accordance with ASTM C94. C. Perform concrete work in accordance with ACI 318,unless specified otherwise. D. Obtain materials from same source throughout work. E. Allowable tolerances shall be in accordance with Section 03100-Concrete Formwork. 1.4 CONCRETE TESTING SERVICE A. Employ and pay for services of independent testing laboratory(ITL),experienced in testing and design of concrete materials and mixtures,to perform materials evaluation tests on proposed aggregates,to design and test new proposed concrete mixes,or review ingredients and performance tests of proposed existing mixes and to perform tests on specimens of concrete used at site. B. TTL shall meet requirements of ASTM E329. Selection of ITL is subject to Architect's and Owner's acceptance. C. Test normal weight concrete aggregates for compliance with ASTM C33 and additional requirements for exterior horizontal concrete. D. Test lightweight aggregates for compliance with ASTM C330. E. Submit mix design for each type and strength of concrete. Proportion designs in accordance with Section 4.3, "Proportioning on the Basis of Field Experience and/or Trial Mixtures" of ACI 318. PART 2 PRODUCTS 2.1 MATERIALS A. Cement: ASTM C150,Type I, corresponding to cement on which selection of concrete proportions was based. Use same brand for each required type of concrete. B. Normal Weight Concrete Aggregates: (Excluding for exterior horizontal concrete)ASTM C33. Do not use aggregates containing soluble salts or other substances which can cause stains on exposed surfaces. Use aggregates from one source of supply corresponding to that on which selection of concrete proportions was based. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 03300-3 C. Aggregates for Exterior Horizontal Concrete: Limits of deleterious substances and physical property requirements of fme and coarse aggregates shall comply with ASTM C33 and following additional requirements for exterior horizontal concrete: Amount of deleterious substances in fme aggregate shall not exceed following limits: Weight Percent of Item Total Sample Maximum Clay lumps and friable particles 0.5 Material finer than No.200 sieve 3.0 Coal,lignite and shale 0.5 1. When fme aggregate is tested for potential reactivity by chemical method in accordance with ASTM C289,relationship between quantity Rc(reduction in alkalinity)and quantity Sc(dissolved silica) shall indicate that material is innocuous. 2. Coarse aggregate for exterior horizontal concrete(other than toppings less than 2 inch in thickness) shall be size number 67 (3/4 inch to No.4)and shall be 100 percent crushed quarry rock composed of basalt,quartzite,granite, limestone or dolomite. For toppings less than 2 inch in thickness use size number 8. 3. When subjected to 5 cycles of soundness test using magnesium sulfate in accordance with ASTM C88,coarse aggregate shall have loss of not more than 18 percent. 4. Coarse aggregate shall have maximum abrasion loss of 40 percent by weight when tested in accordance with ASTM C131,Grading B. 5. Requirements of ASTM C33,Table 3,as to amount of material in coarse aggregate having specific gravity lighter than 2.4 shall include iron oxide. D. Maximum size of coarse aggregates for normal weight concrete shall comply with ACI 301,Article 3.6,but shall not be larger than 1-1/2 inch for footings and caissons,3/4 inch for columns,beams,slabs and toppings exceeding 2 inch in thickness,3/8 inch for toppings 2 inch or less in thickness. E. Water. Fresh,clean,potable,free from injurious amounts of oils,acids,alkalies,salts, organic materials, or other substances that may be deleterious to concrete or steel. F. Fly Ash Admixture: ASTM C618,Class C. Addition of fly ash to regular weight mixes to reduce amount of cement is permissible as follows: 1. When used in exposed concrete it shall be used throughout for uniform color. 2. Weight of fly ash added to designed mixes shall be greater than reduction of weight of cement,with proportions of cement and fly ash selected for 28 day compressive ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03300-4 strengths equal to those specified.Maximum reduction in weight of cement shall not exceed 15 percent of specified amount. G. Admixtures: Admixtures shall conform to ASTM C494 or ASTM C260 and shall not contain chlorides or thiocyanates. 1. Water Reducing Admixtures: ASTM C494,Type A. Add to concrete in accordance with manufacturer's instructions. Eucon WR-75 by Euclid Chemical,Pozzolith 220N by Master Builders,Plastocrete 160 by Sika Chemical, Prokrete N by Protex Industries,or WRDA by Grace Construction Products. 2. Water Reducing,Retarding Admixture: ASTM C494,Type D. Pozzolith 100XR by Master Builders,Plastiment by Sika Chemical,Eucon Retarder-75 by Euclid Chemical, Protard by Protex Industries or Duratard 17 by Grace Construction Products. 3. High Range Water Reducing Admixture(Superplasticizer): ASTM C494,Type F or G. Sikament by Sika Chemical,Eucon 37 by Euclid Chemical,WRDA or Daracem 100 by Grace Construction Products. 4. Non-Corrosive,Non-Chloride Accelerator: ASTM C494,Type C or E,Accelguard 80 by Euclid Chemical,or Daraset by Grace Construction Products. 5. Air-Entraining Admixtures: ASTM C260. Where required air contents are specified,add in accordance with manufacturer's instructions. Protex AES by Protex Industries,Air-Mix by Euclid Chemical,Daravair by Grace Construction Products or Micro-Air by Master Builders. 6. Prohibited Admixtures: Calcium chloride,thiocyanates or admixtures effectively containing chloride ions(more than 0.05 percent)are not permitted. H. Bonding Compound: ASTM C1059,Everbond by L&M Construction Chemicals, Acrylset by Master Builders or Acryl 60 by Thom. Use to bond toppings to base slab. 2.2 NORMAL WEIGHT CONCRETE MIXES A. General: Manufacture and deliver concrete in accordance with ASTM C94 with exceptions specified herein. B. Minimum Compressive Strength: Concrete used for footings and all other concrete shall have minimum compressive strength of 4000 pounds per square inch at 28 days of age except where indicated otherwise on drawings. C. Air Entrainment: Exterior exposed concrete shall contain 6 percent entrained air with maximum tolerance of plus or minus 1.5 percent. ADDENDUM#1 1607.001 - ORONO ICE ARENA (CP-2) Page 03300- 5 D. Maximum Slump: 4 inches for all mixes,except those containing super plasticizer. Tolerance of up to 1 inch above indicated maximum will be allowed for individual batches,provided average for all batches or most recent 10 batches tested,whichever is fewer,does not exceed maximum limit. Slump shall be determined by "Test for Slump of Portland Cement Concrete"(ASTM C143). Where field conditions or workability considerations dictate higher slump,this increased slump shall be obtained only by use of super plasticizer. Concrete shall arrive at job site at slump of 2 inches to 3 inches,be verified,and super plasticizer then added to increase slump to level indicated on approved mix design. E. Minimum Slump: 1 inch. PART 3 EXECUTION 3.1 PLACING CONCRETE A. Place concrete in accordance with ACI 301,Chapter 8. Consolidate concrete in accordance with ACI 309 using high frequency vibrators. B. Clean forms,reinforcing and accessories and dampen forms immediately prior to placing concrete. C. Schedule concrete deliveries to ensure that concrete in each load is placed within 90 minutes after mixing water is added. D. Deposit concrete as near as practicable to its final position to avoid segregation due to rehandling or flowing,in layers not exceeding 12 inch in depth,and compact each layer with vibrators. E. Do not allow concrete to fall freely more than 4 feet. Use tremies,chutes or elephant trunks where necessary. F. Exercise care to prevent"overpouring" columns. Remove column concrete which projects more than 1/2 inch into supported slab or beam. Avoid damaging reinforcing steel during removal. G. Do not use concrete that has partially hardened or been contaminated by foreign materials, nor concrete that has been retempered or remixed after initial set. H. Continue concrete work uninterrupted until completion of run so no concrete is placed against concrete that has attained its initial set,except at construction joints. I. Before depositing new concrete on or against concrete that has set at construction joints, clean,wet and apply neat cement slurry to existing surfaces. Tighten forms prior to resuming pouring. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 03300-6 J. Exercise care to prevent splashing of forms or reinforcing with concrete above level of concrete being placed. K. Clean reinforcement projecting above or out of concrete immediately after completion of particular unit of pour. L. Do not place concrete under adverse weather conditions unless adequate protection is provided. Refer to ACI 301,Article 8.4 for weather restrictions and placing temperatures. M. Conform to ACI 306 when concreting during cold weather. When heating,do not allow carbonation to occur. N. Exercise care during hot weather to keep concrete temperatures and mixing and placing time to minimum. Dispatch transport trucks to avoid delays and organize work to use concrete promptly. O. Conform to ACI 305 when concreting during hot weather including avoidance of alkali reactions to hardened surface. Maintain maximum concrete temperature of 90 degrees F. prior to placing. P. TTL shall monitor vibrations during pile driving or other significant sources of vibration to determine minimum distance to be maintained from concreting operations to avoid damage to freshly placed concrete. Q. Before placing concrete slabs on grade,sprinkle base sufficiently to eliminate suction of water from concrete but there shall not be any free standing water present. Place moisture barrier directly on subgrade material prior to placing granular base at interior slabs on grade. R. Unless noted or detailed otherwise,sidewalk slabs shall be 4 inch thick. S. Comply with ACI 301 - 11.7.8 for installation of concrete topping mixtures. T. Install bonded concrete toppings over precast concrete decks at floors as follows: 1. Thoroughly clean and dampen top surface of deck to receive topping but there shall not be any standing water present. 2. Immediately before topping is placed scrub into surface coat of bonding grout. Do not allow grout to set or dry before topping is placed. Prepare bonding grout using mixture of 1 part cement to 1 part fine sand passing No. 30 mesh sieve, mixed to consistency of thick cream. 3. Place, compact, finish and cure topping mixture as specified for other concrete slabs. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03300 -7 4. Note: At Contractor's option,approved bonding compound may be used in lieu of bonding grout. Install in accordance with manufacturer's instructions. U. Bond concrete toppings placed over concrete slabs to base slabs using bonding compound. Install in accordance with manufacturer's instructions. 3.2 CONSTRUCTION,CONTRACTION AND EXPANSION JOINTS A. Provide construction joints when stoppage of concreting operations occurs. B. Continue reinforcing steel across construction joints unless noted or detailed otherwise. C. Unless detailed otherwise,locate horizontal construction joints in walls and columns at underside of floor slabs and beams. D. Unless detailed otherwise,locate construction joints in supported floors of reinforced concrete structures at center span of slabs,beams or girders with provisions for transfer of shear and bending forces through joints.Provide joints perpendicular to main reinforcement with keys and dowels as detailed. E. Provide very lightly rounded edges at construction,control and expansion joints where slab joint will be exposed. F. Provide joints in concrete slabs-on-grade where shown and constructed as detailed. Where contraction joint spacings are not specifically shown they shall be spaced approximately 15 feet on centers at interior locations where joints will be exposed or under non-resilient floor covering. At interior locations below resilient finish or carpet spacings may be increased to approximately 30 feet. Interior panels shall be near-square with short: long side ratio not less than 2:3. At exterior locations spacings of contraction joints shall not exceed 10 feet on centers and short-long side ratio shall not be less than 3:4. Contraction joints shall be made to depth of 1/4 slab thickness by saw-cuts,joint formers or other method acceptable to Architect. G. Provide cleanly cut,straight joints in toppings over joints in base slab. Provide tooled, lightly rounded edges where exposed. H. Provide vertical construction, contraction and expansion joints in walls as detailed. Pour sections alternately with minimum waiting period of 48 hours between adjacent pours. Unless noted otherwise,locate joints midway between columns. Do not locate joints within 5 feet of corner,wall intersection or column. Unless noted otherwise locate vertical contraction joints in walls at 30 feet maximum spacings. I. Install waterstops in concrete joints where noted. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03300-8 J. Where sawcut control joints in exterior slabs on grade are shown,provide in accordance with ACI 301-11.5, 1/4 depth of slabs unless shown otherwise. Cut joints to their full depth as soon as condition of concrete will permit,in 2 or more passes,with first pass cut 1/2 inch deep. K. Provide control joints in poured in place concrete curbs 10 feet o.c. maximum spacings with expansion joints not over 40 feet o.c. Make control joints by cutting approximately 1/8 inch wide by 1 inch to 1-1/2 inch deep into exposed surfaces. Expansion joints shall be 1/2 inch wide with joint filler. At curbs adjacent to sidewalks,align joints in curb and sidewalk. L. Unless noted or detailed otherwise provide for expansion joints in sidewalks at intervals not to exceed 40 feet on centers and where walks abut curbs,stoops,walls or other fixed objects. Expansion joints shall be 1/2 inch wide using filler materials. Provide tooled weak plane joints across sidewalks, 1 inch deep by 1/4 inch at 5 feet intervals,unless otherwise noted. Tool edges of joints to 1/8 inch radius. 3.3 FINISHING A. Finish bare concrete floors(adjacent to floors with other surfacing)so concrete surface is level with other finishes,unless otherwise noted. B. Grind smooth joints between slabs on grade and structural slabs and between existing and new surfaces just prior to installation of floor covering to eliminate unevenness and to provide smooth,level surface across joints. C. Protect finished surfaces from damage. Keep free of abrasive materials. D. Set screeds by instruments with firm, stable supports,but not mortar mounds. Place concrete to accurate screeds,with screed lines filled. E. Start finishing when concrete has hardened sufficiently to permit use of mechanical rotary finisher and finishing machines shall thoroughly compact and level concrete,using 2 to 4 passes of machine. F. Follow with steel troweling when steel troweling is specified. G. In areas where water will be present(interior and exterior)place and finish slabs so areas will drain and water will not stand in puddles.Conform to slopes shown.At structural slabs,verify elevations of drains to insure drains will be at low points. Where elevations and slopes are not indicated,generally slope floors 1/8 inch per foot uniformly to drains, unless otherwise directed by Architect. H. Scratch Finish: Apply scratch finish to monolithic slab surfaces to receive concrete floor topping or mortar setting beds for tile,portland cement terrazzo, and other bonded applied cementitious finish flooring material,and where indicated. After placing slabs, finish ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 03300-9 surface to tolerances of FF15 (floor flatness)and FL13 (floor levelness) for slabs-on-grade and FF15 for elevated slabs,measured according to ASTM E 1155. Slope surfaces uniformly to drains where required. After leveling,roughen surface before fmal set with stiff brushes,brooms,or rakes. I. Float Finish: Apply float finish to monolithic slab surfaces to receive trowel finish and other finishes as specified;slab surfaces to be covered with membrane or elastic waterproofing, membrane or elastic roofing,or sand-bed terrazzo;and where indicated. After screeding,consolidating and leveling concrete slabs,do not work surface until ready for floating.Begin floating,using float blades or float shoes only,when surface water has disappeared,or when concrete has stiffened sufficiently to permit operation of power- driven floats,or both. Consolidate surface with power-driven floats or by hand-floating if area is small or inaccessible to power units. Finish surfaces to tolerances of F 48 (floor flatness)and FL18 floor levelness)for slabs-on-grade and FF18 for elevated slabs, measured according to ASTM E 1155. Cut down high spots and fill low spots. Uniformly slope surfaces to drains. Immediately after leveling,refloat surface to a uniform,smooth,granular texture. J. Trowel Finish: Apply a trowel finish to monolithic slab surfaces exposed to view and slab surfaces to be covered with resilient flooring,carpet,ceramic or quarry tile,paint,or another thin film-fmish coating system. After floating,begin first trowel-finish operation using a power-driven trowel. Begin final troweling when surface produces a ringing sound as trowel is moved over surface. Consolidate concrete surface by final hand- troweling operation,free of trowel marks,uniform in texture and appearance,and finish surfaces to tolerances of F120(floor flatness)and FL17 (floor levelness)for slabs-on-grade and FF20 for elevated slabs, measured according to ASTM E 1155. Grind smooth any surface defects that would telegraph through applied floor covering system. K. Trowel and Fine Broom Finish: Where ceramic or quarry tile is to be installed with thin- set mortar,apply a trowel finish as specified,then immediately follow by slightly scarifying the surface with a fine broom. L. Nonslip Broom Finish: Apply a nonslip broom finish to exterior concrete platforms, steps,and ramps,and elsewhere as indicated. Immediately after float fmishing, slightly roughen concrete surface by browning with fiber-bristle broom perpendicular to main traffic route. Coordinate required final finish with Architect before application. M. Non-Slip Abrasive Finish: At exterior platforms,ramps, stairs,slabs at entry,stoops and interior ramps and other areas indicated on drawings. Blend abrasive aggregate with Portland cement in proportions recommended by manufacturer of aggregate. Float finish concrete surface,apply approximately two-thirds of blended material to surface by method that insures even coverage without segregation. Float surface immediately after application,after material has been embedded. Remainder of blended material shall be applied to surface at right angles to previous application. Follow with second floating, embed material and complete with broomed floated trowel finish to expose non-slip aggregate. Rate of application shall not be less than 25 pounds per 100 square feet. ADDENDUM#1 1607.001 -ORONO ICE ARENA (CP-2) Page 03300- 10 3.4 MISCELLANEOUS CONCRETE ITEMS A. Provide miscellaneous concrete items as noted and detailed on drawings. B. Provide and install reinforcing,anchors and bolts in concrete where directed and required. C. Provide for installation of inserts,hangers,metal ties and other fastening devices required for attachment of other work. D. Properly locate fastening devices in cooperation with other trades and secure in position before concrete is placed. 3.5 REPAIR OF SURFACE DEFECTS AND PATCHING A. If objectionable air holes,honeycombed areas or other surface defects occur,as determined by Architect,repair defects in accordance with ACI 301,Chapter 9,unless other materials and methods are permitted by Architect. B. At unexposed surfaces fill tie holes in accordance with ACI 301,Chapter 9. C. At exposed surfaces any patching required and permitted,as determined by Architect, shall comply with ACI 301,Article 13.6. D. At exposed surfaces plugging of tie holes,blemish repairs and removal of stains shall be performed as described in ACI 301,Chapter 10. Architect will select materials and methods for plugging of tie holes from alternates described therein. E. Concrete containing surface defects that are not repairable or cannot be patched to produce required finishes,or exceed permissible tolerances,as determined by Architect, shall be removed and replaced. F. Patch existing concrete where noted and where affected by new construction as required to match existing concrete. 3.6 CURING AND PROTECTION A. Provide curing and protection immediately after placement in accordance with ACI 301, Chapter 12. B. Continue curing and protection period as required by ACI 301. Cure not less than 7 days for all concrete,except high-early strength concrete for which period shall be at least 3 days. C. If forms are removed during curing period,immediately employ one of curing materials or methods specified for concrete surfaces not covered by forms and continue for remainder of curing period. See Section 03250,Concrete Accessories,for acceptable liquid membrane-forming curing compounds. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03300- 11 D. At concrete with moist type cure,cover with moisture-proof covering.Remove and wet concrete as often as required to keep damp for entire curing period. Provide continuous curing with no dryouts during entire period. 3.7 QUALITY CONTROL TESTING DURING CONSTRUCTION A. Coordinate with ITL employed by the Owner to make,cure and determine strength of concrete test cylinders cast in field. Perform in accordance with ASTM C172-Method of Sampling Freshly Mixed Concrete,ASTM C31 -Method of Making and Curing Complete Test Specimens in Field and ASTM C39-Test Method for Compressive Strength of Cylindrical Concrete Specimens.Evaluation and acceptance of concrete shall be in accordance with Section 4.7 of ACI 318 with following exceptions: 1. Make 1 set of cylinders for each day's operation and each type of concrete where less . than 50 cubic yards is placed,plus additional set for each 50 cubic yards(or fraction thereof)over and above first 50 cubic yards of each type. Test sets shall consist of 4 cylinders with fourth cylinder to be field-cured specimen. For slabs placed when temperatures are expected to fall below 32 degrees F within 72 hours of placement cast in place(pop out)cylinders shall be used. These cylinders shall be placed close to corners and perimeter of pour. 2. Store field-cured cylinder as near as possible to location of concrete represented by sample and give cylinder,insofar as practicable, same protection and curing as adjacent concrete. Keep other 3 cylinders covered with plastic or wet burlap and in 60- 80 degrees F.temperature range for 24 hours,allowing no injury to cylinders. After this period,and prior to age of 48 hours, deliver 3 cylinders to laboratory for additional curing,taking care not to freeze,crack or damage specimens. 3. Deliver field-cured cylinder to laboratory at 28 days of age for testing to check adequacy of curing and protection as described in Article 4.7.3 of ACI 318. 4. Test other 3 cylinders,laboratory cured,as follows: 1 at 7 days of age for projecting probable 28 day strength and 2 cylinders at 28 days for acceptance of average strength as described in Article 4.7.1 of ACI 318. 5. If additional field cured specimens are required to verify early strength of concrete, contractor shall pay for additional testing. B. Determine slump of concrete in accordance with ASTM C143 - Standard Test Method for Slump of Portland Cement Concrete. Perform 1 test for each set of test cylinders. C. Determine air content of fresh concrete,when air content is specified,in accordance with ASTM C173 or ASTM C231. Where placement is by pump,air content shall be measured at location of placement. For concrete exposed to freezing and thawing, concrete from each truck shall be tested and concrete not meeting specified percentages shall not be placed. For interior concrete not exposed to freezing and thawing,such as lightweight concrete on metal decking,perform 1 test for each set of test cylinders. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03300- 12 Concrete used in performing air content test shall not be used in fabricating test specimens. D. Mark each test cylinder with job name,Contractor's name,mix number,date,location of pour and measured slump. In addition, mark measured air content when air-entraining admixture is specified. E. ITL shall submit copies of test results to Owner,Architect and Contractor as soon as practicable after they are made. 3.8 EVALUATION OF TEST RESULTS AND FAILURE TO MEET STRENGTH REQUIREMENTS A. Test results: Evaluate in accordance with ACI 214. B. Evaluations shall be valid only if samples have been taken and tests have been conducted in accordance with ACI and ASTM specifications and methods as applicable. C. If strength tests performed on concrete cylinders,cast at time concrete is placed,fail to meet specified 28 day values,or if samples have not been taken and tests conducted as specified,concrete represented by such samples and tests shall be considered questionable and shall be subject to further testing at expense of Contractor. D. These additional tests of questionable concrete shall be performed by Independent Testing Laboratory, acceptable to Architect,and shall be conducted in accordance with ASTM C42. Concrete cores may be obtained in field,or load tests conducted and results evaluated in accordance with ACI 318,Chapter 20. E. Test results obtained by use of impact hammer or sonoscope,unless correlated with other data,will not be considered conclusive in evaluating strengths of concrete. F. If additional testing fails to demonstrate strengths adequate for intended purpose of member or members in question,as determined by Architect,remove questionable concrete and replace with concrete meeting specifications. END OF SECTION ADDENDUM#1 1607.001 -ORONO ICE ARENA (CP-2) Page 03300 - 13 SECTION 03412 PRECAST PRESTRESSED CONCRETE DECKING PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Design,manufacture,delivery,storage,protection and erection of precast, prestressed,hollow-core floor and roof deck units. 2. Provision of openings in precast units,for openings exceeding 8 inches in diameter or side dimension. 3. Weld plates cast in units,bearing pads,structural steel headers at openings, straight reinforcing rods in joints of abutting units,bending of joint dowels into keyways, ceiling support inserts. 4. Field welding of connections of precast units to structure. 5. Grouting of side and end joints and sealant along exposed underside joints of decking. B. Related Sections: 1. Section 03300-Cast-in-Place Concrete: Toppings over precast concrete deck where noted. 2. Section 07900-Joint Sealers: Other joint sealers. 1.2 REFERENCES A. ACI 318 -Building Code Requirements for Reinforced Concrete. B. ACI 301 - Specifications for Structural Concrete for Buildings. C. CRSI-Manual of Standard practice. D. AWS D1.1 -Code for Welding in Building Construction. E. AWS D1.4-Reinforcing Steel Welding Code. F. PCI MNL-116-Manual for Quality Control for Plants and Production of Precast Prestressed Concrete Products. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03412- 1 1.3 DESIGN CRITERIA A. Design: Perform in accordance with applicable codes and standards to safely support project dead loads,live loads and equipment loads,without excessive stress or deflection. B. Design Calculations: Performed and certified by Professional Engineer registered in State of Minnesota experienced in precast,prestressed concrete design and submitted to Architect upon request. 1.4 SHOP DRAWINGS A. Submit fabrication and erection drawings in accordance with Section 01300,certified by Professional Engineer registered in state where Project occurs. B. Show dimensions,opening sizes and locations,erection details,connection and anchorage details,steel headers and bearing lengths. C. State finishes,design loads and estimated cambers. Where fire resistance rated units are required,provide verification statement on shop drawings. D. Field verify existing elevations,dimensions and conditions as shown on drawings before preparation of shop drawings and fabrication of materials affected by existing construction and report any discrepancies to Architect for resolution. 1.5 QUALITY ASSURANCE A. Fabricator: Active member of the Prestressed Concrete Institute,participating in its Plant Certification Program. B. Erector: Regularly engaged and experienced in erection of precast concrete units having requirements similar to this project. C. Welders: Qualified in accordance with AWS D1.1,current within past year. D. Testing: Comply with applicable provisions of Prestressed Concrete Institute MNL-116, Manual for Quality Control for Plants and Production of Precast Prestressed Concrete Products. E. Fire Resistance Rated Precast Units: Provide units tested and listed by Underwriters Laboratories with each unit bearing UL label and marking. 1.6 DELIVERY, STORAGE AND HANDLING A. Lift and support units at designated points using lifting devices designed for this work. B. Transport,handle and erect units with proper equipment operated by qualified personnel. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03412 -2 C. Store units off ground in manner that will ensure against chipping,cracking,distortion, staining or other damage. PART 2 PRODUCTS 2.1 MATERIALS AND MANUFACTURERS A. Manufacturers: Machine made precast,prestressed hollow-core slabs of uniform thickness by Spancrete,Molin Concrete Products,Wells Concrete Products B. Materials: 1. Portland Cement,Aggregates,Water and Admixtures: As specified in Section 3300- Cast-In-Place Concrete and recommended by deck manufacturer. Do not use materials containing calcium chloride in precast,prestressed concrete. 2. Strands: Uncoated,7-wire,stress-relieved strand,ASTM A416-Grade 250K or 270K. 3. Reinforcing Steel: a. Bars: ASTM A615. b. Wire,Cold Drawn Steel: ASTM A82. c. Welded Steel Wire Fabric: ASTM A185. d. Welded Deformed Steel Fabric: ASTM A497. 4. Structural Steel Shapes and Plates: ASTM A36. 5. Ceiling Support Inserts: Provide at spacings not exceeding 4 feet o.c.each way. Type used shall be acceptable to Architect. 6. Bearing Pads,Grout and Sealant: As recommended by deck manufacturer. Sealant color shall be selected by Architect. Bearing pads shall be non-staining. 2.2 FABRICATION A. Fabricate units in accordance with reviewed shop drawings and dimensional tolerances of PCI MNL-116. B. Fabricate from concrete having minimum compressive strength of 5,000 psi at 28 days of age. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03412 -3 C. Provide concrete having minimum compressive strength of 3,000 psi at time of initial prestress,or greater if required by design. D. Cast in inserts,bolts and plates as noted and detailed on drawings or required for complete installation of deck. E. Provide openings shown on drawings that exceed 8 inches in diameter or side dimension. F. Provide standard finishes as follows: 1. Underside: Resulting from casting against approved forms using good industry practice in cleaning of forms,design of concrete mix,placing and curing. Small surface holes caused by air bubbles,normal color variations,normal form joint marks,and minor chips and spalls will be tolerated,but no major or unsightly imperfections,honeycomb,or other defects will be permitted. 2. Topside: Result of vibrating screed and additional hand finishing at projections. Normal color variations,minor indentations, minor chips and spalls will be permitted. No major imperfections,honeycomb,or defects will be permitted. 3. Exposed Ends: Recess strands,fill with grout and sack finish surfaces. G. Minor patching in plant will be acceptable provided structural adequacy and appearance are not impaired. PART 3 EXECUTION 3.1 EXAMINATION A. Examine supporting structure and conditions under which precast concrete work is to be erected prior to commencement of work. B. Do not proceed with installation until any unsatisfactory conditions found have been corrected. 3.2 ERECTION A. Lift,place and secure deck units to supports in accordance with reviewed shop drawings and manufacturer's printed instructions. B. Follow erection procedures and sequence of erection as recommended by manufacturer. C. Align and level members within allowable tolerances. Adjust variations between adjacent members by jacking,loading,or other feasible method as recommended by manufacturer and acceptable to Architect. ADDENDUM#1 1607.001 -ORONO ICE ARENA (CP-2) Page 03412-4 D. Secure units in place as shown on reviewed shop drawings. Welding by qualified welders in accordance with applicable provisions of American Welding Society Codes. E. Grout joints between units using 1:3 cement-sand grout mix with care taken to assure that joints are filled. Remove any grout that may have seeped through to underside ceilings before it hardens. F. Apply sealant to underside joints of deck units exposed to view. G. Erect units without damaging shape or finish. Replace or repair damaged units. H. Do not field cut or install sleeves larger than size permitted by deck manufacturer for pipe, conduit, ducts or other items. Do not cut reinforcing rods or prestressing strands without approval of manufacturer and as acceptable to Architect. Field cut holes that are not core drilled or concealed by ceilings or pipe chases from the underside of slabs. END OF SECTION ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 03412-5 STRUCTURAL STEEL PART 1 GENERAL 1.1 SUMMARY A. Section Includes: SECTION 05120 1. Structural steel framing, steel lintels, shelf angles,open web joist bearing anchor plates, steel beam wall bearing plates, roof opening frames, mechanical equipment support frames and other items fabricated from structural steel shapes and plates. 2. Steel items welded to structural steel framing. 3. Bolts and welding for steel to steel connections. 4. Studs, anchor bolts,expansion bolts and other incidental items of structural steel required to be built into concrete or masonry. Provide these items to respective trades at proper times and include instructions or templates for their installation. 5. Shop painting of structural steel. 6. Erection of structural steel including installation of grout below steel bearing and base plates. B. Related Sections: 1. Section 05210- Steel Joists. 2. Section 05400 - Cold-Formed Metal Framing. 3. Section 05500 - Metal Fabrications. 1.2 REFERENCES A. AISC Specification for Design,Fabrication and Erection of Structural Steel for Buildings. B. AISC Code of Standard Practice for Steel Buildings and Bridges. C. AISC Specification for Structural Joints Using ASTM A325 or A490 Bolts. D. AWS D1.1 - Structural Welding Code. E. Steel Structures Painting Council (SSPC) - PS7.01. ADDENDUM#1 1607.001 - ORONO ICE ARENA (CP-2) Page 05120 - 1 • F. ASTM A36- Structural Steel. G. ASTM A572-High-Strength Low-Alloy Columbium-Vanadium Steels of Structural Quality. H. ASTM A500-Cold Formed Welded and Seamless Carbon Steel Structural Tubing. I. ASTM A53 -Welded and Seamless Steel Pipe. J. ASTM A501 -Hot Formed Welded and Seamless Carbon Steel Structural Tubing. K. ASTM A123-Zinc(Hot-Galvanized)Coatings on Products Fabricated from Rolled, Pressed,and Forged Steel Shapes,Plates,Bars,and Strip. L. ASTM A153 -Zinc Coating(Hot-Dip)on Iron and Steel Hardware(Bolts and similar threaded fasteners). 1.3 SHOP DRAWINGS A. Submit fabrication and erection drawings in accordance with Section 01300. Prepare drawings in accordance with reference standards. B. Show sizes, lengths,locations,quantities,fabrication details and ASTM designations on shop drawings. Show cambers where required. C. Give paint manufacturers name and number where painting is required. D. Indicate items to be galvanized,where required. E. Before preparation of shop drawings and fabrication of materials affected by existing construction,field verify existing elevations,dimensions and conditions as shown on drawings and report discrepancies to Architect for resolution. 1.4 QUALITY ASSURANCE A. Welding equipment and procedures shall comply with AWS Structural Welding Code requirements. B. Welders,welding operators, and tackers shall be qualified in accordance with Section 6.4 of AWS Structural Welding Code. 1.5 DELIVERY,STORAGE AND HANDLING A. Deliver materials to site at such intervals to insure uninterrupted progress of work. ADDENDUM#1 1607.001 -ORONO ICE ARENA (CP-2) Page 05120-2 B. Deliver anchor bolts and anchorage devices,to be embedded in cast-in-place concrete or masonry in ample time to not delay work. C. Keep steel members off ground,using pallets,platforms,or other supports. Protect steel members and packaged materials from corrosion and deterioration. D. Do not store materials on structure in manner that might cause distortion or damage to members or supporting structures. Repair or replace damaged materials or structures as directed. PART 2 PRODUCTS 2.1 MATERIALS AND COMPONENTS A. Structural Steel Shapes and Plates: ASTM A36. B. Square or Rectangular Tubing: ASTM A500,Grade B. C. Steel Pipe: ASTM A501 or ASTM A53,Types E or S,Grade B. D. High Strength Bolts: ASTM A325. LeJeune Tension Control Bolts or Bethlehem Load Indicator Bolts are acceptable. Provide flat washers under all nuts. (Steel to steel connections). E. Unfinished Bolts: ASTM A307 -Grade A. (Anchor Bolts and Sag Rods). F. Welding Electrodes: E70XX G. Expansion Bolts: Kwik-bolts,Wej-it bolts,Thunderstuds or National Fasteners. H. Headed Shear Connector Studs: Standard fluxed headed type of diameter and length noted on drawings,by Nelson Stud Welding or Erico Fastening Systems. I. Shop Paint and Touch Up Paint: Glidden 595,Rust-Oleum 769,Hentzen#4080, Tnemec 10-99R,lead and chromate free,complying with VOC guidelines,dry mil thickness 2 minimum/3-1/2 maximum. J. Hot Dip Galvanizing for Shapes and Plates: ASTM A123. K. Hot Dip Galvanizing for Bolts and similar Treaded Fasteners: ASTM A153. L. Touch Up Paint for Galvanized Items: Organic cold galvanizing compound having minimum of 94 percent zinc dust in dry film. Z.R.C.Chemical Products Seymore of Sycamore. Use aluminum paint for fmish coats where specified. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 05120-3 M. Non-Shrink Grout: Pre-packaged,non-metallic,non-gaseous,non-corrosive,non- staining,complying with Corps of Engineers,CRD-C 621 and ASTM C1107. Use quick setting type for sleeves. 2.2 FABRICATION A. Fabricate structural steel in accordance with reviewed shop drawings,AISC Specifications and Code of Standard Practice. B. Punch and drill structural steel as indicated on drawings for securing other work. C. Weld shop connections in accordance with AWS Structural Welding Code or bolt using A325 high strength bolts installed in accordance with reference standards,unless otherwise shown or noted. D. Clip angles,headed shear connector studs or other components shown welded to top flanges of beams,except for end connections, shall be shipped loose for attachment in field. E. Provide cambers in members where shown or noted on drawings. F. Build up welded door frames attached to structural steel framing. Weld exposed joints continuously and grind smooth. Plug weld steel bar stops to frames,except where shown removable. Secure removable stops to frames with countersunk,cross-recessed head machine screws,uniformly spaced not more than 10 inches o.c.,unless otherwise shown. G. Where lintel and soffit plates are indicated with edge flush with masonry,horizontal leg shall(1) stop 1/4 inch short of masonry at jambs,or(2)be notched at end extending into masonry to permit mortar joints across face. At beam and plate lintels, spanning from jamb to jamb of opening,stop plate short of masonry also. Where bearing of horizontal leg is required at opening jamb,notch lintel end to permit full 3/4 inch of mortar cover along face. H. Preparation, Steel for Paint: Brush-Off Blast Cleaning(SSPC-SP 7), Power Tool Cleaning(SSPC-SP3)or Hand Tool Cleaning(SSPC-SP-2). I. Do not paint steelwork concealed by interior building finish,spray-on fireproofing or concrete encasement. Steelwork that will not be shop painted shall,after fabrication,be cleaned of oil or grease by solvent cleaners and be cleaned of dirt and other foreign material by thorough sweeping with fiber brush. J. Other steelwork,not specifically exempted as described above or required to be galvanized, shall be cleaned and given one shop coat of paint in compliance with Steel Structures Painting Council SSPC-PS7.01. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 05120-4 K. Shapes and plates noted to be galvanized shall be hot-dip galvanized in compliance with ASTM A123. L. Bolts and similar threaded fasteners noted to be galvanized shall be hot-dip galvanized in compliance with ASTM A153. 2.3 SHOP QUALITY CONTROL A. Owner will select and pay for services of independent testing laboratory(ITL)to perform testing of shop full penetration welds as follows: 1. Full Penetration Welds: Test 100% of all full penetration welds exceeding 5/16 inch, using Ultrasonic Testing per AWS,D1.1 Section 6. Test 25% of all full penetration welds less than 5/16 inch,using Magnetic Particle Testing per ASTM E-109, performed on root pass and on fmished weld. (Technical II). B. Contractor will pay for services of independent testing laboratory to perform tests listed below: 1. High Strength Bolting: a. Preparation: Visually inspect mating surfaces and bolt type for all slip-critical bolted connections for general conformance with the Contract Documents prior to bolting. (Technical II). b. Slip Critical Bolts and Tension Bolts: Test bolt tightening in 10% of all bolts. Test a minimum of two bolts in each connection. Verify that all plies of connected elements have been brought into contact,at 100%of connections. Verify all tips are removed from"twist-off'bolts. (Technical II). c. Bearing Bolts: Visually inspect to confirm all plies of connected elements have been brought into contact, at 100% of connections. (Applies only to bolts designed for values not requiring exclusion of threads from failure plane,all other bolts require testings as for tension bolts.) (Technical II). 2. Shop Welding: a. Fillet Welds: Visually inspect 100% of all fillet welds for size,length and quality,per AWS D1.1. (Technical II). b. Partial Penetration Welds: Test 100% of all partial penetration welds exceeding 5/16 inch,using Ultrasonic Testing per AWS D1.1, Section 6. Test 25% of all partial penetration welds less than 5/16 inch,using Magnetic Particle Testing per ASTM E-109,performed on root pass and on finished weld. (Technical II). ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 05120-5 3. Testing of high strength bolting, fillet weld and partial penetration weld testing will be waived if fabrication shop satisfies AISC Quality Certification Program- Category I,or more stringent criteria,or is approved by building official and SER. a. SER and Building Official will reinstate shop welding test requirements if work is considered questionable through visual observation of an ITL. PART 3 EXECUTION 3.1 ERECTION A. Erect structural steel in accordance with reviewed shop drawings,AISC Specification and Code of Standard Practice. B. Provide temporary shoring and bracing as required during erection. C. Install high strength bolts in conformance with AISC Specification for Structural Joints using ASTM A325 or A490 Bolts. If Tension Control Bolts or Load Indicator Bolts are used bolts shall be installed following recommendations of manufacturer. Hardened steel, round,flat washer shall be used under each nut and bolts shall be tightened until wrench twists off spliced ends. D. Install headed shear connector studs in accordance with manufacturer's instructions and AWS Structural Welding Code. E. Do not field cut openings through structural steel members for passage of conduit,pipes, or ducts without obtaining written permission from Architect. Wherever permission is given,provide openings and additionally reinforce member as directed by Architect. F. Clean concrete and masonry bearing surfaces below steel base and bearing plates of any bond-reducing materials. Clean bottom surfaces of base and bearing plates. Set plates at correct elevations by using steel wedges,shims,adjustable nuts or other devices. Pack specified non-shrink grout solidly between bearing surfaces and plates to insure that no voids remain.Mix,install,protect and cure grout in accordance with manufacturer's instructions. G. After erection of shop painted items clean bolted connections and abraded areas of primer and touch-up connections and prime coat with same paint material as used for shop coat. Do not paint members or areas of steel where painting is not required. H. After erection of galvanized items any areas damaged by welding,flame cutting,or during handling,transport or erection shall be repaired whenever damage exceeds 3/16 inch in width. Surfaces to be reconditioned shall be clean,dry,and free of oil, grease and corrosion products. Power sand disc areas to bright metal extending into undamaged galvanized coating. Apply specified touch-up paint by spray or brush in multiple coats to achieve dry film thickness of 8 mils minimum. Where damaged area will remain exposed apply finish coat of aluminum paint to provide color blend with surrounding galvanizing. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 05120-6 3.2 FIELD QUALITY CONTROL A. Employ independent testing laboratory to perform inspections and tests specified herein. B. Selection of testing laboratory is subject to Architect's acceptance. C. Submit reports of inspections and test results to Architect as soon as practicable after they are made. D. Provide necessary scaffolding or temporary platforms required by testing laboratory in order to perform their work. In event steel framework is found by them to be inadequate, and such scaffolding or platforms shall comply with safety regulations and shall be acceptable to testing laboratory. E. Inspections and testing of high strength bolted connections shall consist of following: 1. Review with testing laboratory requirements and demonstrate method to be used for tightening of bolts to comply with ASTM specifications. 2. Where power wrenches or manual torque wrenches are to be used,testing laboratory shall approve procedures for calibration of wrenches and installation of bolts. 3. Enable testing laboratory to observe field installations of bolts to verify that approved procedures are being followed for bearing-type connections and that plies of connected elements have been brought into snug contact. 4. For bolts in friction-type connections,allow verification by testing laboratory that bolts in completed connections have been tightened to required tensions. a. Test minimum of 1 bolt at connections consisting of 10 bolts or less and minimum of 2 bolts,but not less than 10 percent,at connections with more than 10 bolts. b. If 1 or more bolts in connection is below required minimum tension,all bolts in that connection shall be tested,or retightened and tested again,until approved by testing laboratory. c. At connections using several bolts,return wrench to "touch up"bolts previously tightened to assure that all are tightened to prescribed amount. F. Allow testing laboratory to visually inspect field welding of steel members in accordance with Section 6, Inspection of AWS Structural Welding Code. Full penetration field welds shall be tested ultrasonically. Correct work that is not approved and inspect until welds are acceptable to laboratory. Perform such additional inspecting and work at no additional cost to Owner. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 05120 -7 , G. Testing laboratory shall inspect and test installation of headed shear connector studs in accordance with Section 7,of AWS Structural Welding Code. Repairs to welds and replacements of studs that fail during tests shall be performed as described. END OF SECTION ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 05120-8 SECTION 05210 STEEL JOISTS PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Open-web standard and longspan steel joists. 2. Bottom and top chord extensions where shown or noted. 3. Ceiling extensions where ceilings are attached to bottom of joists. 4. Bridging and bridging anchors. 5. Joist wall and beam anchors. 6. Steel headers supported by and carrying steel joists where noted on drawings to be furnished by steel joist supplier. 7. Welded,bolted or anchored end connections as noted or detailed. 8. Shop painting of joists and accessories. 9. Complete erection of joists,installation of accessories and touch-up painting at connections and abrasions. 10. Non-shrink grout below joist end bearing plates bearing on concrete or masonry supports. B. Related Sections: 1. Section 05120- Structural Steel: Structural steel and anchor plates. 2. Section 05312- Steel Roof Decking. 3. Section 09900- Painting: Field painting. 1.2 REFERENCES A. Standard Specifications for Open Web Steel Joists, K Series,published by Steel Joist Institute. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 05210- 1 B. Standard Specifications for Longspan Steel Joists,LH Series,and Deep Longspan Steel Joists,DLH Series,published by Steel Joist Institute. C. Recommended Code of Standard Practice for Steel Joists Published by Steel Joist Institute. D. Structural Welding Code of American Welding Society(AWS D1.1). E. Welding of Open Web Steel Joists: Technical Digest No. 8, Steel Joist Institute. 1.3 DESIGN CRITERIA A. Design: Perform in accordance with applicable codes and standards to safely support project dead loads and live loads,without excessive stress or deflection. Design joists designated as "Special" for loads specifically denoted on drawings. Size designations for "SP"joists shown on drawings are for estimating purposes only. B. Design Calculations: Performed and certified by Professional Engineer registered in State of Minnesota,experienced in steel joist design and submitted to Architect upon request. 1.4 SHOP DRAWINGS A. Submit shop drawings in accordance with Section 01300. Shop drawings for"Special" joists as indicated on drawings are to be certified by Professional Engineer registered in State of Minnesota. Shop drawings for"Special"joists shall include load diagram used for design. B. State joist manufacturer's name,sizes,types,quantities,locations,painting and accessories included. C. State field welding,bolting or other anchorages required and include instructions and details as necessary for complete installation of joists and accessories. D. Before preparation of shop drawings and fabrication of materials affected by existing construction,field verify existing elevations,dimensions and conditions as shown on drawings and report any discrepancies to Architect for resolution. 1.5 QUALITY ASSURANCE A. Joist manufacturer shall be member of Steel Joist Institute. B. Design,detail, manufacture,paint, handle and erect joists in strict accordance with applicable Standard Specifications of Steel Joist Institute. C. Comply with Steel Joist Institute Code Requirements for welding equipment and procedures. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 05210 -2 D. Welders shall be qualified in accordance with Section 6.4 of AWS Structural Welding Code. 1.6 DELIVERY, STORAGE AND HANDLING A. Deliver,store and handle steel joists as recommended in SR "Specifications". Handle and store joists in manner to avoid deforming members and to avoid excessive stresses. PART 2 PRODUCTS 2.1 MATERIALS A. Refer to drawings for types, sizes and locations of open-web steel joists. B. Joists and Accessories: Conform to Steel Joist Institute Specifications. C. Connection Bolts: ASTM A307,Grade A. D. Welding Electrodes: Of type required for materials being welded. E. Primer Paint: Shop paint shall comply with Steel Joist Institute Specifications using red oxide primer conforming to Steel Structures Painting Council Specifications 15-68T, Type 1 or FS TT-P-636. F. Non-Shrink Grout: Pre-packaged,non-metallic,non-gaseous,non-corrosive,non- staining,complying with Corps of Engineers,CRD-C 621 and ASM C1107. 2.2 FABRICATION A. Fabricate open-web steel joists in accordance with reviewed shop drawings and SR Specifications. B. Provide extended chords on joists where shown. Top chord extensions shall comply with SR Specifications and load tables. C. Provide ceiling extensions on joists in areas having ceilings attached directly to bottom chords. Extend ends to within 1/2 inch of finished wall surface. D. Provide horizontal or diagonal type bridging as noted, complete with anchors for ends of bridging lines terminating at walls or beams. Number of bridging rows and spacings shall conform to SR Specifications. E. Provide end anchorages as noted to secure joists to adjacent construction. Anchorages shall comply with SR Specifications. F. Provide header units to support tail joists at openings not framed with steel shapes. ADDENDUM#1 1607.001 - ORONO ICE ARENA(CP-2) Page 05210-3 G. Remove loose scale,heavy rust and other foreign material from fabricated joists before application of shop paint. PART 3 EXECUTION 3.1 EXAMINATION A. Examine supporting substrates,embedded bearing plates,and abutting structural framing, with installer present,for compliance with requirements for installation tolerances and other conditions affecting performance of joists. Do not proceed with installation until unsatisfactory conditions have been corrected. 3.2 ERECTION A. Place and secure joists in accordance with reviewed shop drawings, SJI Specifications and manufacturer's instructions. B. Furnish anchor bolts and other devices to be built into concrete or masonry construction. Furnish drawings,templates or instructions for accurate locations of anchors. C. Do not start placement of joists until supports are in place and secure. Place joists on supports,adjust and align in accurate locations and spacings before permanently fastening. D. Install bridging simultaneously with joist erection,before construction loads are applied. Anchor ends of bridging lines at top and bottom chords where terminating at walls and beams. E. Field weld joists to steel supports or anchor plates in accordance with SJI Specifications and reviewed shop drawings. Coordinate welding sequence and procedure with placing of joists. Secure joists resting on masonry or concrete bearing surfaces by bedding on non-shrink grout and anchoring in accordance with SJI Specifications and reviewed shop drawings. F. After joist installation, "touch-up" paint field welds,bolt heads and nuts,and abraded or rusty surfaces on joists,accessories and steel supports.Wire brush surfaces and clean with solvent before painting. Use same paint as used for shop primer. END OF SECTION ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 05210 -4 SECTION 05312 STEEL ROOF DECKING PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Steel roof decking,filler sheets,ridge and valley plates, closure plates,flat cover plates where deck changes span direction or abuts existing deck,cant strips and recessed sump pans. 2. Shop finish on decking. 3. Field "touch-up" painting after installation. B. Related Sections: 1. Section 05120- Structural Steel: Structural steel supports. 2. Section 05210-Steel Joists: Open-web steel joist supports. 1.2 REFERENCES A. Specification for Design of Cold-Formed Steel Structural Members published by American Iron and Steel Institute. B. Steel Roof Deck Design Manual by Steel Deck Institute. C. Structural Welding Code of American Welding Society(AWS D1.1). 1.3 SHOP DRAWINGS A. Submit shop drawings in accordance with Section 01300. B. Show layout of decking,field welding requirements,side lap fastenings,accessories provided and information required for complete erection of decking. C. Include name of deck manufacturer,type, depth,gauge of steel and finish. D. Describe types and locations of acoustical materials and closures and include instructions for installation of these items. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 05312- 1 1.4 QUALITY ASSURANCE A. Welding equipment and procedures shall comply with AWS Structural Welding Code requirements. B. Welders shall be qualified in accordance with Section 6.4 of AWS Structural Welding Code. 1.5 DELIVERY, STORAGE AND HANDLING A. Store decking off ground and under waterproof cover. Elevate one end to permit drainage. 1.6 STEEL ROOF DECKING TO RECEIVE SPRAYED FIREPROOFING A. Provide decking to receive sprayed fireproofing free of amounts of lubricants,oils or other contaminants which would significantly impair adhesion of sprayed fireproofing. PART 2 PRODUCTS 2.1 MATERIALS A. Wide Rib Steel Roof Deck: As defined in Steel Roof Deck Design Manual,of depth and gauge shown on drawings;Nucor Vulcraft Divisions Type 1.5B,or 1.5BI,Wheeling Corrugating Type B or BW,Bowman Type B,Epic Metals Type B or 1B. B. Basic Steel Decking with Painted Shop Finish: ASTM A611. C. Shop Paint Finish: Chemically clean,phosphatize and properly prepare surface for painting. Coat with rust-inhibitive primer,standard with manufacturer,applied in even coat and oven cured. D. Welding Electrodes: Type required for materials being welded. 2.2 FABRICATION A. Fabricate metal decking in accordance with reviewed shop drawings. B. Cut sheets in lengths to extend over minimum of 3 spans. C. Cut sheets to required lengths so that end joints will occur over supporting members. D. Lap ends of sheets minimum of 2 inches centered over centerlines of supports. E. Fabricate sump pans from single piece of 14 gauge galvanized steel.Fabricate other accessories from 20 gauge sheets,unless noted otherwise,with finish to match decking. ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 05312-2 4 PART 3 EXECUTION 3.1 INSTALLATION A. Install metal decking and accessories in accordance with reviewed shop drawing and manufacturer's printed instructions. B. Place deck units on supporting steel framework and adjust to fmal position with end bearing lengths on supporting members not less than 3 inches,and accurately align end to end before permanently fastening. Lap ends of sheets minimum of 2 inches centered over centerlines of supports.Do not stretch or contract side-lap interlocks. C. Permanently fasten deck units to steel supports with fully fused puddle welds,penetrating layers of decking. Place welds in edge ribs and at spaces not exceeding 12 inches on centers between edge rib welds,unless noted otherwise. Puddle welds shall have fusion areas to supporting members not less than 3/8 inch by 1 inch or 1/2 inch diameter in size. Spacings of welds along marginal members shall not exceed 12 inches on centers. D. Fasten end closures by tack welding or machine screws at spacings not exceeding 36 inches o.c. Mechanically fasten or tack weld side closures at spacings not exceeding 36 inches o.c. E. Fasten side laps of adjacent deck units between supports at intervals not exceeding 24 inches o.c. If decking has interlocking side laps,fastenings may be button punched. For simple overlaps use self-tapping screws no smaller than No. 12. For 18 gauge and heavier decks fastenings may be tack welds. F. Cut and fit deck units and accessories around other work projecting through or adjacent to decking. Provide neat,square and trim cuts. G. Provide metal closure strips at open,uncovered ends and edges of roof decking,and in voids between decking and other construction. Weld or mechanically fasten into position to provide complete decking installation. H. •Place roof drain sump pans over openings in decking and weld to top of decking. I. Install rubber closures top and underside continuous at ends of runs of acoustic decking where noted or detailed on drawings. J. Comply with AWS requirements and procedures for manual shielded metal arc welding, appearance and quality of welds,and methods used in correcting welding work. K. After decking installation, wire brush,clean and paint abraded areas,weld burn areas,rust spots and welds on top and bottom surfaces of decking units. For decking with shop paint fmish use same paint as provided by deck manufacturer. For galvanized decking use Z.R.C. Cold Galvanizing Compound. Inspect welds for size,quality and spacing. Inspect mechanical fastenings or welding of side laps. Correct weld burn holes by caulking or taping with metallic tape. END OF SECTION ADDENDUM#1 1607.001 -ORONO ICE ARENA(CP-2) Page 05312 -3 • HAMMEL GREEN AND ABRAHAMSON, INC., ARCHITECTS AND ENGINEERS 1201 HARMON PLACE,MINNEAPOLIS, MINNESOTA 55403 ADDENDUM#2 Second Addendum to drawings and specifications entitled: ORONO ICE ARENA(CP-2) ORONO MINNESOTA COMMISSION NUMBER: 1607.001 20 NOVEMBER 1996 The additions, revisions, omissions, corrections and clarifications contained herein shall be made to drawings and specifications for the project and shall be included in scope of work and bids to be submitted. References made below to specifications and drawings shall be used as a general guide only. Bidders and Contractors shall determine for themselves the work affected by Addendum items. SPECIFICATIONS-ALL CONSTRUCTION Al - Sections Issued: (A)The following sections are hereby issued as a part of this Addendum: 00305 -Bid Form 01030-Alternates DETAILS- GENERAL CONSTRUCTION Gl -Details Issued: (A)The following details are hereby issued as a part of this Addendum: R1/C350 7&8/A202 12A/A202 2&3/A802 6A&6B/A802 11/A802 -2/A801 12/A802 DRAWINGS- GENERAL CONSTRUCTION Gl - Sheet A202: (A) General Note#1 should read as follows: All interior partitions are wall Type 1 UNO. (B) At enlarged plan 4/A202, add frame type reference FR#11 at aluminum frames on grids 3.4 and 3.6 (2 thus). G2- Sheet A802: (A)Delete the following details: 1/A802, 13/A802, 17/A802. ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page - 1 a G3 - Sheet A901: (A)At detail 11/A901, add the following note: "Embed handrail 4" into slab; set in non-shrink grout,type" at base of steel handrail. SPECIFICATIONS-MECHANICAL CONSTRUCTION M4- Sections Isssed: (A)The following sections are hereby issued as a part of this Addendum: 15488 -Natural Gas Piping Systems 15510-Hydronic Piping 15530-Refrigerant Piping 15575 -Breedings, Chimneys, and Stacks 15610-Furnaces 15620-Fuel-Fired Heaters 15625 -Direct Fired Gas Makeup Air Heaters 15670- Condensing Units M5 - Section 15440-Plumbing Fixtures: (A)Article 2.6. Delete A.5 Emergency Equipment. (B) Article 2.7. 1. Subparagraph 2.b. Change last sentence to read: Set flush valve supply 11-1/2" above rim of bowl. 2. Subparagraph 5. Change to: Item F-3A Lavatory Handicapped. 3. Subparagraph 5. Add the following: g. Insulation: Provide molded covering for waste and water piping. Brocar Products Incorporated"Trapwrap" or Truebro"HandiLav-Guard." 4. Subparagraph 6. Change to: Item F-3-Lavatory. 5. Delete the following fixture: 11. Item F-7 Shower. 6. Subpargraph 12. Change to read as follows: 12. Item F-7A Shower-Accessible a. Receptor: Shower receptor is to be furnished by the General Contractor. Floor drain shall be provided by this contractor as specified in other section. b. Trim: Symmons No. 96-1-295-B30-L-V-QD-X "Temptrol" shower system, pressure balancing valve with single blade metal lever handle and adjustable stop screw. Levertrol 4-458 diverter,Fre-flow 2.75 g.p.m. shower head with adjustable spray. Wal/hand shower with 72" flexible metal hose with quick connect fitting, in-line vacuum breaker, 30" C.P. brass bar. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page -2 . 7. Add the following fixture 13. Item F-1B Water Closet-ADA Accessible a. Bowl: American-Standard No. 2477.016 Water-Saver"Afwall" siphon jet action, elongated bowl,wall hung, 1-1/2"top spud, vitreous china. b. Valve: Sloan No. 115-YBYC "Regal" quiet exposed flush valve, chrome plated, metal oscillating non-hold-open handle, 1" I.P.S. screwdriver bak-chek angle stop with protective cap, adjustable tailpiece, sweat-solder adaptor kit, vacuum breaker flush connection and spud coupling for 1-1/2" top spud, wall and spud flanges. Set flush valve supply 11-1/2"" above rim of bowl. c. Seat: Beneke No. 523-SS/CH white plastic elongated open front seat less cover. d. Carrier: Josam Series 12000-1 adjustable carrier in conjunction with fully adjustable fitting for either vertical or horizontal installation. DRAWINGS-MECHANICAL CONSTRUCTION M6- Sheet P101: (A)Revise sanitary sewer invert elevation at point of leaving building to invert elevation 997'-0". END OF ADDENDUM#2 ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page - 3 DOCUMENT 00305 -BID FORM COMBINED FOR ALL CONTRACTS BIDDER (1) We hereby submit our bid for CP-2 Building Completion, for Orono Ice Arena, for the contract as completed on the Bid Form. We agree to accomplish • the Work in strict accordance with the requirements of drawings and specifications and other Contract Documents for the work as prepared by HGA Architects/Ted Rozeboom Architects. Having examined the Contract Documents, visited the site and noted all conditions affecting the Work, the Undersigned proposes to furnish all Iabor, materials and equipment required to accomplish the Work called for by said documents in amounts as proposed herein. NOTE: This project is tax exempt. Bids shall Iq include any sales or use tax. • (2) RASE BID(S): SECTION BASE BID $ SECTION BASE BID $ SECTION BASE BID $ SECTION BASE BID $ SECTION BASE BID $ • (3) ALTERNATES: ALTERNATE #1 ADD / DEDUCT $ ALTERNATE #2 ADD / DEDUCT $ ALTERNATE #3 ADD / DEDUCT $ ALTERNATE #4 ADD / DEDUCT $ ALTERNATE #5 ADD / DEDUCT $ ALTERNATE #6 ADD / DEDUCT $ ALTERNATE #7 ADD / DEDUCT $ ALTERNATE #8 ADD / DEDUCT $ ALTERNATE #9 ADD / DEDUCT $ ALTERNATE #10 ADD / DEDUCT S ORONO ICE ARENA SECTION 00305- 1 ORONO, MINNESOTA (4) ACCEPTANCE OF BIDS: In submitting this bid, it is understood that the right is reserved by Owner and their Construction Manager to accept any bid in his best interest, reject all bids, to accept any of the Alternates in his best interest, which may be accepted in any order or reject all of the Alternates, and to waive minor discrepancies in bidding procedure. The Undersigned will not withdraw this bid within 30 days after the date of opening of bids. (5) CONTRACT AND BOND: If awarded the Contract, the Undersigned agrees to execute an agreement within the specified time in the form of AGC Form B50, Standard Subcontractor Agreement, for the above stated compensation. (6) CHANGES IN WORD: In the event changes in work necessitates a change in cost, the percentage applied for supervision, profit and overhead will be in accordance with Article 7 of the Supplementary Conditions. (7) COMPLETION OF WORK: If the Undersigned Bidder is notified of the acceptance of this bid within 30 days after the date of bid opening, he agrees to have the Work substantially complete and ready for occupancy and use, as well as finally complete, in accordance with requirements specified under Section 01950. (8) ADDENDA: Addendum instructions number have been received and incorporated in this bid. END OF DOCUMENT ORONO ICE ARENA SECTION 00305-2 ORONO, MINNESOTA SECTION 01030 ALTERNATES PART 1 GENERAL 1.1 GENERAL INFORMATION AND REQUIREMENTS A. Contractor shall submit an alternate price for each Alternate. Submit each alternate price as an individual cost change to the base bid sum. (Not accumulative). B. Where an Alternate might possibly involve another Alternate, depending on acceptance, consider each Alternate as a change to the stipulated contract sum, with no considerations for other Alternates. In the event of overlapping omissions or inclusions in more than one accepted Alternate, the cost of the Alternate will be adjusted by Change Order. C. The Owner reserves the right to reject all Alternates. The Owner will accept Alternates in any order regardless of(in the numerical)order in which they are listed. D. Under each Alternate, include the work of all trades for the Contract as they may be affected and make all adjustments to accommodate the changes. In executing the work, make provisions for future completion,unless otherwise specified. E. Owner reserves the right to delay decisions on Alternates and to accept or reject Alternates within 30 days after bid date unless longer Alternate time frames are indicated. PART 2 ALTERNATES 2.1 ALTERNATE NO. 1: Contractor to provide a price to delete the asphalt wear course and tack coat as per Section 02500. 2.2 ALTERNATE NO. 2: Contractor to provide a price to delete shell locker rooms(refer to hatched area on sheet A201 for scope of deduct alternate). Delete the following in hatched area: masonry partitions, doors and frames, metal toilet partitions and toilet accessories, wood benches and supporting metal angles, acrylic plaster ceiling finish and backer board. 2.3 ALTERNATE NO. 3: Contractor to provide a price to delete interior painting. Delete all painting of structural steel, metal deck CMU walls, precast panel walls in Arena area north of grid C. 2.4 ALTERNATE NO. 4: Contractor to provide a price to delete Kalwall translucent panels and frames(8 thus). Delete openings in precast wall panel at these locations. 2.5 ALTERNATE NO. 5: Contractor to provide a price to delete all lighting fixtures, wall switches, receptacle outlets, and fire alarm devices in Rooms 18, 19, 20, 21, 22, 23, 24 and 25. Delete all associated branch circuit wiring and conduit. ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 01030 - 1 2.6 ALTERNATE NO. 6: Contractor to provide a price to delete base cabinets and upper cabinets at Rooms 08 and 10. Delete sinks. 2.7 ALTERNATE NO. 7: Contractor to provide a price to delete/add alternate finish for precast panels(refer to Section 03410, Article 2.3, paragraph C.3. 2.8 ALTERNATE NO. 8: Contractor to provide a price to delete entrance trellis(refer to details 9, 10, 11, sheet A202). Delete steel tube trellis assembly, concrete curb, and concrete footing associated with trellis assembly. 2.9 ALTERNATE NO. 9: Contractor to provide a price to provide rough in only for locker room plumbing fixtures. Waste piping shall be capped above the floor with provisions for future connection. Provide a protective cap over each waste pipe that extends through the floor. Cap shall be firmly anchored to the floor to protect the waste pipe. Provide capped vents extending through the roof for future connection. Valve and cap domestic hot and cold water piping branches at mains. 2.10 ALTERNATE NO. 10: Contractor to provide a price to delete dual level lighting fixtures and provide single level fixtures of same manufacturer and wattage in Room 11B. END OF SECTION ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 01030- 2 SECTION 15488 NATURAL GAS PIPING SYSTEMS PART 1 -GENERAL 1.1 RELATED DOCUMENTS A. Requirements of the following Division 15 Sections apply to this section: 1. "Basic Mechanical Requirements." 2. "Basic Mechanical Materials and Methods." 1.2 SUMMARY A. This Section includes piping,specialties,and accessories for natural gas systems within the building and to the gas meters. B. This Section includes piping,specialties,and accessories for natural gas systems within the building and to a point indicated. C. Approximate values of natural gas that will be supplied for these systems are the following: 1. Heating Value: 1000 Btu/cu.ft. 2. Specific Gravity: 0.6. 3. Service Line Pressure: Verify with local gas utility 4. Firm gas shall be supplied to the building at 2 psi pressure. D. Related Sections: The following Sections contain requirements that relate to this Section: 1. Division 7 Section: "Joint Sealers" for materials and methods for sealing pipe penetrations through walls and fire and smoke barriers. 1.3 DEFINITIONS A. Low-Pressure Natural Gas Piping System: Operating at pressure of 0.5 psig or less. B. Medium-Pressure Natural Gas Piping System: Operating at pressure greater than 0.5 psig, but not greater than 2 psig. C. High-Pressure Natural Gas Piping System: Operating at pressure greater than 2 psig,but not greater than 5 psig. ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15488 - 1 D. Natural Gas Service: Operating at pressure indicated. E. Gas Main or Distribution Main: Piping to convey gas to individual gas services or other gas mains. F. Gas Service: Pipe from the gas main or other source to gas point of delivery for the building being served. Piping includes gas service piping,gas valve,service pressure regulator,meter bar or meter support,and gas meter. G. Gas Delivery Point: Outlet of gas meter or service pressure regulator,or when no gas meter is provided,the gas service valve. H. Gas Piping System: Pipe within the building that conveys gas from point of delivery to points of usage. Piping includes dielectric fitting and gas valve immediately downstream from point of delivery. 1.4 SYSTEM PERFORMANCE REQUIREMENTS A. Minimum Working Pressure Ratings: Except where otherwise indicated,the following are minimum pressure requirements. 1. Low-Pressure Natural Gas Piping Systems: 2 psig. 2. Medium-Pressure Natural Gas Piping Systems: 10 psig. 3. High-Pressure Natural Gas Piping Systems: 20 psig. 4. Natural Gas Service: 100 psig. 1.5 SUBMITTALS A. General: Submit the following according to Conditions of Contract and Division 1 Specification Sections. B. Product data for each type of natural gas specialty and special-duty valve. Include pressure rating in psig,rated capacity in cu. ft. per hour(CFH), and settings of selected models. C. Maintenance data for natural gas special ties and special-duty valves for inclusion in Operating and Maintenance Manuals specified in Division 1 Section "Project Closeout." D. Test reports specified in "Field Quality Control" Article in Part 3. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15488 -2 1.6 QUALITY ASSURANCE A. Comply with State Building Code for gas piping materials and components;installations; and inspection,testing,and purging. B. Comply with NFPA 54"National Fuel Gas Code" for gas piping materials and components;installations;and inspection,testing,and purging. C. Comply with NFPA 70 "National Electrical Code" for electrical connections between wiring and electrically operated control devices. D. Provide listing/approval stamp,label,or other marking on equipment made to specified standards. E. Listing and Labeling: Provide equipment and accessories that are listed and labeled. 1. Terms "Listed" and"Labeled": As defined in the National Electrical Code,Article 100. 2. Listing and Labeling Agency Qualifications: A"Nationally Recognized Testing Laboratory" (NRTL)as defined in OSHA Regulation 1910.7. F. Product Options: Natural gas systems equipment, specialties, and accessories are based on specific types,manufacturers,and models indicated. Equipment and other components • having equal performance characteristics by other manufacturers may be considered, provided deviations in dimensions,operation,and other characteristics do not change design concept or intended performance as judged by the Architect. The burden of proof of equality of products is on the Contractor. Refer to Division 1 Section "Product Substitutions." 1.7 DELIVERY, STORAGE,AND HANDLING A. Handling Flammable Liquids: Remove and legally dispose of liquids from drips in existing gas piping. Handle cautiously to avoid spillage and ignition. Notify the gas supplier. Handle flammable liquids used by the Installer with proper precautions,and do not leave on the premises from end of one day to beginning of next day. 1.8 SEQUENCING AND SCHEDULING A. Notification of Interruption of Service: Notify each affected user when gas supply will be turned off. B. Work Interruptions: Leave gas systems in a safe condition when interruptions in work occur while repairs or alterations are being made to existing gas piping systems. • ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15488 -3 PART 2-PRODUCTS 2.1 MANUFACTURERS A. Manufacturers: Subject to compliance with requirements,provide products by one of the following: 1. Gas Pressure Regulators: a. American Meter Co. b. Equimeter,Inc.,A BTR Co. c. Fisher Controls. d. Gas Energy,Inc., Subsid.,Brooklyn Union Gas. e. Jordan Valve Div.,Richards Industries, Inc. f. Lancaster by National Meter Parts,Inc. g. Maxitrol Co. h. Schlumberger Industries,Gas Div. 2. Low-Pressure Gas Stops: a. Hammond Valve Corp. b. Jomar International,Ltd. c. Lancaster by National Meter Parts,Inc. d. A.Y.McDonald Mfg.Co. e. Rockford-Eclipse Div.,Eclipse,Inc. 3. Gas Valves,2 Inches and Smaller: a. Homestead by Olson Technologies,Inc. b. Lancaster by National Meter Parts,Inc. c. A.Y. McDonald Mfg.Co. d. Milliken Valve Co.,Inc. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15488 -4 e. Mueller Co.,A Grinnell Co. f. Mueller Steam Specialty Div.,Core Industries, Inc. g. Nordstrum Valves, Inc. h. Resun by J.M.Huber Corp.,Equipment Div. i. Rockford-Eclipse Div.,Eclipse, Inc. 4. Gas Valves,2-1/2 Inches and Larger. a. Homestead by Olson Technologies,Inc. b. Milliken Valve Co.,Inc. c. Mueller Steam Specialty Div.,Core Industries,Inc. d. Nordstrum Valves, Inc. e. Resun by J.M.Huber Corp. f. Xomox Corp. 5. Solenoid Valves: a. Atkomatic Valve Co.,Inc. b. Automatic Switch Co. c. Magnatrol Valve Corp. d. Skinner Valve Div.,Honeywell,Inc. 2.2 PIPES AND TUBES A. General: Refer to "Pipe Applications" Article in Part 3 for identification of systems where the following materials are used. B. Steel Pipe: ASTM A 53,Type E,Electric-Resistance Welded or Type S,Grade B, Schedule 40,black. 2.3 PIPE AND TUBE FITTINGS A. Malleable-Iron Threaded Fittings: ASME B 16.3,Class 150, standard pattern,with threads conforming to ASME B 1.20.1. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15488 -5 B. Unions: ASME B 16.39,Class 150,black malleable iron;female pattern;brass-to-iron seat;ground joint. C. Cast-Iron Fittings: ASME B16.1,Classes 125 and 250. D. Steel Fittings: ASME B16.9,wrought steel,butt-welding type;and ASME B16.11, forged steel. E. Steel Flanges and Flanged Fittings: ASME B 16.5. F. Transition Fittings: Type, material,and end connections to match piping being joined. 2.4 JOINING MATERIALS A. Common Joining Materials: Refer to Division 15 Section "Basic Mechanical Materials and Methods" for joining materials not included in this Section. B. Brazing Filler Metals: AWS A5.8,Classification BAg-1 (silver). Filler metal containing phosphorus is prohibited. C. Joint Compound and Tape: Suitable for natural gas. D. Gasket Material: Thickness,material,and type suitable for natural gas. 2.5 VALVES A. Manual Valves: Conform to standards listed,or where appropriate,valves according to ANSI 221.15 and ANSI Z21.15a. B. Gas Valves,2 Inches and Smaller: ASME B16.33, 150 psi WOG,bronze body,bronze plug,straightaway pattern, square head,tapered-plug type,with threaded ends. C. Gas Valves,2-1/2 Inches and Larger: MSS SP-78,Class 125 or 175 WOG,lubricated plug type,semisteel body,wrench operated,with flanged ends. D. Automatic Shutoff Valves: ANSI Z21.21 or ANSI Z21.21a,for operation by appliance automatic shutoff device. Two inches and smaller with threaded ends and 2-1/2 inches and larger with flanged ends. 1. Operation: Electrical. E. Solenoid Valves: Bronze,aluminum, or cast-iron body; 120 volts a.c.,60 Hz,Class B continuous-duty molded coil;UL labeled and FM approved. Include ISC 6,NEMA 4 coil enclosure and electrically opened and electrically closed dual coils. Valve position is normally closed. Include threaded ends for 2 inches and smaller and flanged ends for 2-1/2 inches and larger. ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15488 -6 2.6 PIPING SPECIALTIES A. Gas Pressure Regulators: ANSI Z21.18 or ANSI Z21.18a, single stage,steel jacketed, corrosion-resistant pressure regulators. Include atmospheric vent,elevation compensator, with threaded ends for 2 inches and smaller and flanged ends for 2-1/2 inches and larger. Regulator pressure ratings,inlet and outlet pressures,and flow volume in standard cubic feet per hour of natural gas at specific gravity are as indicated. 1. Service Gas Pressure Regulators: Inlet pressure rating not less than natural gas distribution system service pressure. 2. Line Gas Pressure Regulators: Inlet pressure rating not less than system pressure. 3. Appliance Gas Pressure Regulators: Inlet pressure rating not less than system pressure, with capacity and pressure setting matching appliance. 4. Gas Pressure Regulator Vents: Factory-or field-installed corrosion-resistant screen in opening when not connected to vent piping. B. Flexible Connectors: ANSI Z21.24 or ANSI Z21.24a,copper alloy. C. Strainers: Y pattern,full size of connecting piping. Include Type 304 stainless-steel screens with 3/64-inch perforations except where other screens are indicated. 1. Pressure Rating: 125 psig minimum steam or 175 psig WOG working pressure except where otherwise indicated. 2. Sizes 2 Inches and Smaller: Bronze body,with female threaded ends. 3. Sizes 2-1/2 Inches and Larger: Cast-iron body,with flanged ends. 4. Screwed screen retainer with centered blowdown and pipe plug. 2.7 PROTECTIVE COATING A. Furnish pipe and fittings with factory-applied,corrosion-resistant polyethylene coating for use in corrosive atmosphere. Coating properties include: 1. Applied to pipe and fittings treated with a compatible primer prior to application of tape. 2. Overall Thickness: 20 mils,synthetic adhesive. 3. Water Vapor Transmission Rate: Maximum 0.10 gallon per 100 square inches. 4. Water Absorption: 0.02 percent maximum. ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15488 -7 PART 3 -EXECUTION 3.1 PREPARATION A. Precautions: Close equipment shutoff valves before turning off gas to the premises or section of piping. Perform leakage test as specified in "Field Quality Control" Article to determine that all equipment is turned off in the piping section to be affected. B. Comply with NFPA 54"Prevention of Accidental Ignition." 3.2 EXCAVATION A. Excavation,trenching;and backfilling is specified in Division 2 Section "Earthwork." 3.3 PREPARATION OF FOUNDATION FOR BURIED PIPING A. Grade trench bottom to provide smooth,firm, stable,and rock-free foundation throughout length of piping. B. Remove unstable,soft,and unsuitable materials at surface on which piping is to be laid, and backfill with clean sand or pea gravel to indicated level. C. Shape bottom of trench to fit bottom of piping. Fill unevenness with tamped-sand backfill. Dig bell holes at each pipe joint to relieve bells of loads and to ensure continuous bearing of pipe barrel on foundation. 3.4 SERVICE ENTRANCE PIPING A. Extend natural gas piping and connect to gas distribution system(gas service)piping in location and size indicated for gas service entrance to building. 1. Gas distribution system piping,service gas pressure regulator, and gas meter will be ' provided by gas utility. 2. Include gas distribution system piping to point indicated. 3. Include gas distribution system piping to point indicated,gas service pressure regulator,and gas meter. Install in piping and specialty arrangement indicated. B. Install buried gas distribution system piping with 2 feet minimum cover. C. Install shutoff valve,downstream of gas meter,outside building at gas service entrance. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15488 - 8 3.5 PIPE APPLICATIONS A. General: Flanges,unions,transition and special fittings,and valves with pressure ratings same or higher than system pressure rating may be used in applications below,except where specified otherwise. B. Low-Pressure Natural Gas Systems,above Ground within Building: Use the following: 1. 2 Inches and Smaller: Steel pipe,malleable-iron,threaded fittings,and threaded joints. 2. 2-1t2 Inches and Larger: Steel pipe,butt-welding fittings,and welded joints. C. Natural Gas Systems,Buried within Building: Use steel pipe,butt-welding fittings,and welded joints. Encase gas carrier piping in containment conduits. D. Underground Containment Conduits: Use steel pipe,butt-welding fittings,and welded joints. 3.6 VALVE APPLICATIONS A. Use gas valves for shutoff to appliances. B. Use gas valves of sizes indicated for gas service piping,meters,mains,and where indicated. 3.7 JOINT CONSTRUCTION A. Use materials suitable for natural gas service. 1. Brazed Joints: Make joints with brazing alloy having melting point greater than 1000 deg F(538 deg C). Brazing alloys containing phosphorus are prohibited. 3.8 PIPING INSTALLATIONS A. Concealed Locations: Except as specified below,install concealed gas piping in an air-tight vented conduit constructed of Schedule 40 seamless black steel with welded joints. 1. Above-Ceiling Locations: Gas piping may be installed in accessible above-ceiling spaces (subject to approval of the authority having jurisdiction),when such spaces are not used as a plenum. Do not locate valves in such spaces. 2. In Partitions: Do not install concealed piping in solid partitions. Protect tubing against physical damage when it is installed inside partitions or hollow walls. This does not apply to tubing passing through partitions or walls. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15488 -9 3. In Walls: Gas piping with welded joints and protective wrapping specified in "Protective Coating" Article in Part 2 may be installed in masonry walls(subject to approval of authority having jurisdiction). 4. Prohibited Locations: Do not install gas piping in or through circulating air ducts, clothes or trash chutes,chimneys or gas vents(flues),ventilating ducts,or dumbwaiter or elevator shafts. This does not apply to accessible above-ceiling space specified above. B. Drips and Sediment Traps: Install drips at points where condensate may collect. Include outlets of gas meters. Locate where readily accessible to permit cleaning and emptying. Do not install where condensate would be subject to freezing. 1. . Construct drips and sediment traps using tee fitting with bottom outlet plugged or capped. Use minimum-length nipple of 3 pipe diameters,but not less than 3 inches long,and same size as connected pipe. Install with space between bottom of drip and floor for removal of plug or cap. C. Conceal pipe installations in walls,pipe spaces,utility spaces,above ceilings,below grade or floors,and in floor channels,except where indicated to be exposed to view. D. Install gas piping at a uniform grade of 1/4 inch in 15 feet,upward toward risers. Install piping upward from service risers to meters,service regulator when meter is not provided, and equipment. E. Make reductions in pipe sizes using eccentric reducer fittings installed with the level side down. F. Connect branch piping from top or side of horizontal piping. G. Install unions in pipes 2 inches and smaller,adjacent to each valve,at final connection to each piece of equipment,and elsewhere as indicated. Unions are not required on flanged • devices. H. Install dielectric fittings(unions and flanges)with 1 ferrous and 1 brass or bronze-end connections,separated by insulating material,where piping of dissimilar metals are joined. I. Install dielectric fittings(unions and flanges)with 2 ferrous end connections,separated by insulating material,at outlet from gas meter and,where indicated,for ferrous piping. J. Install flanges on valves,specialties,and equipment having 2-1/2-inch and larger connections. K. Install strainers on the supply side of each control valve,gas pressure regulator,solenoid valve,and elsewhere as indicated. ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15488 - 10 L. Anchor piping to ensure proper direction of piping expansion and contraction. Install expansion joints,expansion loops,and pipe guides as indicated. M. Install vent piping for gas pressure regulators and gas trains,extend outside building,and vent to atmosphere. Terminate vents with turned-down,reducing elbow fittings with corrosion-resistant insect screens in large end. N. Install containment conduits for buried gas piping within building in gas-tight conduits extending 4 inches minimum outside building and vented to atmosphere. Terminate vents with turned-down,reducing elbow fittings with corrosion-resistant insect screens in large end. Prepare and paint outside of conduits with coal tar epoxy-polyamide paint according to SSPC Paint 16. O. Install emergency shut off valves furnished by gas equipment suppliers. P. Install gas pipe with a protective coating when located in areas where contact with material or atmosphere exerts a corrosive action. 3.9 HANGERS AND SUPPORTS A. General: Hangers and supports are specified in Division 15 Section "Hangers and Supports." B. Install the following pipe hangers and supports: 1. Adjustable steel clevis hangers for individual horizontal runs less than 20 feet in length. 2. Adjustable roller hangers for individual horizontal runs 20 feet or longer. Adjustable steel clevis hangers may be used if hanger support rods longer than 12 inches are used. 3. Two or four bolt riser clamps for support of vertical pipes. C. Install vibration isolation hangers on piping as required by Division 15 Section "Vibration Control. D. Maximum spacing may be limited by structural loading limitations. Do not exceed 12 foot maximum spacings,unless resulting structural loading is approved by the Architect. E. Support vertical runs at each floor. 3.10 VALVE INSTALLATION A. Install valves in accessible locations,protected from physical damage. Tag valves with a metal tag attached with a metal chain indicating the piping systems supplied. ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15488 - 11 B. Install a gas valve upstream of each gas pressure regulator. Where two gas pressure regulators are installed in series in a single gas line,a manual valve is not required at the second regulator. C. Install pressure-relief or pressure-limiting devices so they can be readily operated to determine if valve is free;test to determine pressure at which they will operate;and examine for leakage when in closed position. 3.11 CONNECTIONS A. Install gas piping next to gas-utilizing equipment and appliances to allow servicing and maintenance. B. Connect gas piping to gas-utilizing equipment and appliances with shutoff valves and unions. Make connections downstream of valves and unions,with flexible connectors where indicated. C. Electrical Connections: Wiring is specified in Division 16. 3.12 TERMINAL EQUIPMENT CONNECTIONS A. Install a gas valve upstream and within 6 feet of each gas-utilizing appliance. Install a union or flanged connection downstream from the valve to permit removal of controls. B. Sediment Traps: Install tee fittings forming drips,as close as practical to gas appliance inlets. Cap or plug bottom outlet. 3.13 ELECTRICAL BONDING AND GROUNDING A. Install above-ground portions of natural gas piping systems that are upstream from equipment shutoff valves,electrically continuous and bonded to a grounding electrode according to NFPA 70. B. Do not use gas piping as a grounding electrode. 3.14 FIELD QUALITY CONTROL A. Inspect,test,and purge natural gas systems according to NFPA 54,Part 4"Gas Piping Inspection,Testing,and Purging" and local gas utility requirements. B. Repair leaks and defects with new materials,and retest system until satisfactory results are obtained. C. Report test results promptly and in writing to the Architect and the authority having jurisdiction. ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15488 - 12 D. Verify capacities and pressure ratings of gas meters,regulators,valves,and specialties. E. Verify correct pressure settings for pressure regulators. F. Verify that specified piping tests are complete. 3.15 ADJUSTING A. Adjust controls and safety devices. Replace damaged and malfunctioning controls and safety devices. END OF SECTION ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15488 - 13 SECTION 15510 HYDRONIC PIPING PART 1 -GENERAL 1.1 RELATED DOCUMENTS A. Requirements of the following Division 15 Sections apply to this Section: 1. "Basic Mechanical Requirements." 2. "Basic Mechanical Materials and Methods" Sections. 1.2 SUMMARY A. This Section includes piping systems for hot water heating from the desiccant dryer to the snow melt pit and makeup water for this system;and condensate drain piping. Piping materials and equipment specified in this Section include the following: 1. Pipes,fittings,and specialties. 2. Special-duty valves. 3. Hydronic specialties. B. Related Sections: The following Sections contain requirements that relate to this Section: 1. Division 7 Sections for materials and methods for sealing pipe penetrations through exterior and foundation walls,and fire and smoke bathers. 1.3 SYSTEM DESCRIPTION A. Hydronic systems are low water temperature,forced,recirculating systems and include 4- pipe,hot water and chilled water systems,and condenser water systems. 1.4 SUBMITTALS A. General: Submit each item in this Article according to the Conditions of the Contract and Division 1 Specification Sections. B. Product Data including rated capacities of selected models,weights (shipping,installed, and operating),furnished specialties,accessories,and installation instructions for each hydronic specialty and special-duty valve specified. C. Shop Drawings detailing pipe anchors,special pipe support assemblies,alignment guides, and expansion joints and loops. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15510- 1 D. Field test reports indicating and interpreting test results for compliance with performance requirements specified in Part 3 of this Section. E. Maintenance data for hydronic specialties and special-duty valves to include in the operation and maintenance manual specified in Division 1 and Division 15 Section "Basic Mechanical Requirements." 1.5 QUALITY ASSURANCE A. ASME Compliance: Comply with the following provisions: 1. ASME B31.9,"Building Services Piping," for materials,products,and installation. Safety valves and pressure vessels shall bear the appropriate ASME label. 2. ASME B31.1, "Power Piping," for materials,products,and installation. Safety valves and pressure vessels shall bear the appropriate ASME label. 3. Fabricate and stamp air separators and compression tanks to comply with ASME Boiler and Pressure Vessel Code, Section VIII,Division 1. 4. Welding Standards: Qualify welding processes and operators according to ASME Boiler and Pressure Vessel Code, Section IX, "Welding and Brazing Qualifications." 5. State Building Code with local amendments. 1.6 COORDINATION A. Coordinate layout and installation of piping with equipment and with other installations. B. Coordinate pipe fitting pressure classes with products specified in related Sections. C. Coordinate installation of pipe sleeves for penetrations in exterior and foundation walls, floor assemblies,and fire and smoke bathers. Coordinate with requirements specified in Division 7 Sections for sealing and firestopping pipe penetrations. 1.7 EXTRA MATERIALS A. Maintenance Stock: Furnish a sufficient quantity of chemicals for initial system startup and for preventive maintenance for one year from Substantial Completion. PART 2-PRODUCTS 2.1 MANUFACTURERS A. Manufacturers: Subject to compliance with requirements,provide products by one of the following: ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15510-2 1. Safety Relief Valves: a. Amtrol,Inc. b. Armstrong Pumps,Inc. c. Conbraco Industries,Inc. d. ITT McDonnell&Miller. e. Kunkle Valve Co.,Inc. f. Spirax Sarco,Inc. g. Watts Regulator Co. 2. Air Vents(manual and automatic): a. Amtrol,Inc. b. Armstrong Pumps,Inc. c. ITT Hoffman Specialty. d. ITT Bell&Gossett. e. Taco,Inc. 3. Air Separators: a. Amtrol,Inc. b. Armstrong Pumps,Inc. c. ITT Bell&Gossett. d. Taco,Inc. 4. Ethylene-Glycol: a. Dow Dowtherm SR-1. b. Union Carbide UCARTHERM. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15510-3 2.2 PIPE AND TUBING MATERIALS A. General: Refer to Part 3 "Pipe Applications"Article for identifying where the following materials are used. B. Drawn-Temper Copper Tubing: ASTM B 88,Type L(ASTM B 88M,Type B). C. Annealed-Temper Copper Tubing: ASTM B 88,Type K(ASTM B 88M,Type A). 2.3 FITTINGS A. Wrought-Copper Fittings: ASME B16.22. B. Wrought-Copper Unions: ASME B16.22. C. Pipe Expansion Joints: Refer to Division 15 Section"Pipe Expansion Joints." 2.4 JOINING MATERIALS A. Solder Filler Metals: ASTM B 32,95-5 tin antimony. B. Brazing Filler Metals: AWS A5.8. 1. BAg 1: Silver. • 2. BCuP5: Silver(15%)-Copper(80%)-Phosphorus(5%). 2.5 VALVES A. General Duty Valves: Refer to Division 15 Section"Valves" for check,ball,and butterfly valves. Refer to Part 3 "Valve Applications" Article for specific uses and applications for each valve specified. B. Calibrated Balance Valves: Refer to Division 15 Section"Meters and Gages" for calibrated balance valves (flow measuring devices). C. Safety Relief Valves: Safety relief valves for full relief capacity of equipment served according to ASME Boiler and Pressure Vessel Code, Section IV. Cast-bronze,or cast iron body,Class 250;forged copper-alloy disc and nozzle; fully enclosed,cadmium- plated steel spring with adjustable pressure range and positive shutoff;with threaded or raised-face flanged inlet and threaded outlet connections;factory set and sealed. Safety relief valves shall discharge at the pressures indicated,or at 10 psi above the operating pressure. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15510-4 2.6 HYDRONIC SPECIALTIES A. Manual Air Vent: Bronze body and nonferrous internal parts; 150-psi working pressure, 240 deg F operating temperature;manually operated with screwdriver or thumbscrew; with 1/8-inch NPS discharge connection and 1/2-inch NPS inlet connection. 3/8-inch ball valves used for larger air vents. B. Automatic Air Separator/Air Eliminator: Combination air separator and automatic air elimination valve. Unit designed with tangential inlet and outlet to create a vortex in the body of the unit to allow air separation from flowing system water,and to vent air automatically to atmosphere through a float activated,system pressure actuated,air elimination valve. Cast iron or welded steel body and nonferrous internal parts; 150-psig working pressure,240 deg F operating temperature. Designed for bypass installation with 1 inch system water inlet and outlet,3/8 inch discharge air connection and 3/4 inch drain connection. Capacities of 2.0 SCFM at 2.5 psig,and 10.0 SCFM at 10.0 psig.Bypass flows from 2 to 8 GPM. (Amtrol Model 721). C. Water Treatment Chemicals: Specially formulated to prevent accumulation of scale and corrosion in piping system and connected equipment,and based on a water analysis of makeup water. D. Y-Pattern Strainers: 125-psi working pressure;cast-iron body(ASTM A 126,Class B), flanged ends for 2-1/2-inch NPS and larger,threaded connections for 2-inch NPS and smaller,bolted cover,perforated Type 304 stainless-steel basket,and bottom drain connection. PART 3 -EXECUTION 3.1 PIPE APPLICATIONS A. Hot Water,2-Inch NPS and Smaller: Above ground,use Type L(Type B)drawn-temper copper tubing with soldered joints,or Schedule 40 black steel pipe with threaded joints. B. Hot Water,2-Inch NPS and Smaller: Below ground or within slabs,use Type K annealed-temper copper tubing without joints. Cover tubing with 3/4-inch thickness of flexible unicellular insulation over entire concealed length. C. Condensate Drain Lines: Type L(Type B)drawn-temper copper tubing with soldered joints or Schedule 40 PVC pipe with solvent-welded joints. Do not use plastic pipe in return air plenum ceilings. 3.2 VALVE APPLICATIONS A. General-Duty Valve Applications: Use the following valve types: 1. Shutoff Duty: Use ball,and butterfly valves. ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15510-5 2. Balancing Duty: Use ball,and butterfly valves in combination with flow measuring devices. 3. Drain Duty: Use ball valves with hose end connections. B. Install shutoff-duty valves at each branch connection to supply mains,at supply connections to each piece of equipment,and as indicated. C. Install balancing-duty valves at each branch connection to return mains,at return connections to each piece of equipment,and as indicated. Install in combination with flow measuring devices. D. Install drain valves at low points in mains,risers,branch lines,and as required for system drainage. E. Install check valves on each pump discharge and as required to control flow direction. F. Install safety relief valves on hot water generators and elsewhere as required by ASME Boiler and Pressure Vessel Code. Pipe discharge to floor without valves. Comply with ASME Boiler and Pressure Vessel Code,Section VIII,Division 1,for installation requirements. Verify pressure relief selection with the Architect. 3.3 PIPING INSTALLATIONS A. Install piping according to Division 15 Section "Basic Mechanical Materials and Methods." B. Locate groups of pipes parallel to each other,spaced to permit applying insulation and servicing of valves. C. Install drains at low points in mains,risers,and branch lines consisting of a tee fitting, 3/4-inch NPS ball valve,and short 3/4-inch NPS threaded nipple and cap. D. Install piping at a uniform grade of 0.2 percent(1 inch in 40 feet)upward in direction of flow. E. Reduce pipe sizes using eccentric reducer fitting installed with level side up. F. Install branch connections to mains using tee fittings in main with takeoff out bottom of main,except for up-feed risers with takeoff out top of main line. G. Install unions in pipes 2-inch NPS and smaller, adjacent to each valve,at final connections to each piece of equipment, and as indicated. Unions are not required at flanged connections. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15510-6 H. Install flanges on valves,apparatus,and equipment having 2-1/2-inch NPS and larger connections. I. Install flexible pipe connectors at inlet and discharge connections to pumps(except in-line pumps)and other vibration-producing equipment. Refer to Division 15 Section "Vibration Controls." J. Install strainers on supply side of each in-line pump,and where indicated. Install 3/4-inch NPS nipple and ball valve in blow-down connection of strainers 2-inch NPS and larger. K. Anchor and guide piping to ensure proper direction of expansion and contraction. Refer to Division 15 Section"Pipe Expansion Joints." L. Install makeup water piping to hydronic systems. Extend piping from a reduced pressure backflow preventor with a shutoff valve. M. Install drain traps for each condensate drain pan for cooling coils in air handling units and fan-coil units. Provide vented water seal and terminate with a turned-down elbow at a floor drain. For packaged rooftop equipment,provide drain traps with vented water seal and a turned-down elbow to discharge on the roof. N. Install drain piping for outside air and relief/exhaust air plenums,and as indicated. Provide a waste fitting on the sheet metal plenum,and extend a turned-down elbow at a floor drain. Do not trap. Do not use plastic pipe. O. Install automatic control valves and sensor immersion wells in piping systems as required. Refer to Division 15 Section "Automatic Controls System." 3.4 HANGERS AND SUPPORTS A. General: Hanger,support,and anchor devices are specified in Division 15 Section "Hangers and Supports." B. Conform to the hanger and support spacing requirements specified in Division 15 Section "Hangers and Supports." Maximum spacing may be limited by structural limitations. Do not exceed 12 foot maximum spacings,unless resulting structural loading is approved by the Architect. C. Install the following types of pipe hangers and supports: 1. Adjustable steel clevis hangers for individual horizontal runs less than 20 feet in length. 2. Adjustable roller hangers for individual horizontal runs 20 feet or longer. Adjustable steel clevis hangers may be used if hanger support rods longer than 12 inches are used. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15510-7 3. Adjustable pipe roll stands for multiple horizontal runs 20 feet or longer, supported on a trapeze. 4. Two-or four-bolt riser clamps to support vertical runs. D. Install vibration isolation springs on piping as required by Division 15 Section"Vibration Control." E. Support vertical runs at each floor. 3.5 PIPE JOINT CONSTRUCTION A. Refer to Division 15 Section "Basic Mechanical Materials and Methods" for joint construction requirements for soldered and brazed joints in copper tubing;threaded, welded,and flanged joints in steel piping;and solvent-welded joints for PVC piping. B. Mechanical Joints: Assemble joints according to fitting manufacturer's written instructions. 3.6 HYDRONIC SPECIALTIES INSTALLATION A. Install manual air vents at high points in system,at heat-transfer coils,where indicated, and as required for system air venting. Manual air vents on main piping,and central air handling unit heating and cooling coils shall be 3/8-inch ball valves. B. Install automatic air vents at tangential air separators,where indicated,and as required for system air venting. Pipe outlet of automatic air vent to a floor drain. C. Install automatic air separator/air eliminator at system high points,where indicated, and as required for system venting. Provide bypass piping with shutoff valve,balancing valve, flow measuring device,and drain valve. Provide pressure gage at unit. Extend air discharge piping to a floor drain. D. Install tangential air separators in pump suction lines where indicated. Install drain valve on units 2-inch NPS and larger. Install an automatic air vent at the air discharge connection. Pipe outlet of automatic air vent to a floor drain. E. Install diaphragm-type compression tanks where indicated. Provide support from floor or overhead structure for weight of tank,piping,fittings,plus weight of a full tank of water. Vent and purge air from hydronic system,and charge tank with proper air charge to suit system design requirements. F. Install strainer in pump suction lines where indicated. Install blow-down piping with gate valve;extend to nearest floor drain. Install 3/4-inch NPS nipple and ball valve in blow- down connection of strainers 2-inch NPS and larger. ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15510- 8 3.7 TERMINAL EQUIPMENT CONNECTIONS A. Piping size for supply and return shall be same size as equipment connections. B. Install control valves in accessible locations close to equipment and as recommended by the automatic control valve supplier. Provide pipe increasers and reducers as required for control valves selected. C. Install pressure gage at coil inlet connections. 3.8 FIELD QUALITY CONTROL A. Testing Preparation: Prepare hydronic piping according to ASME B31.9 and as follows: 1. Leave joints,including welds,uninsulated and exposed for examination during test. 2. Provide temporary restraints for expansion joints that cannot sustain reactions due to test pressure. If temporary restraints are impractical, isolate expansion joints from testing. 3. Flush system with clean water. Clean strainers. 4. Isolate equipment that is not subjected to test pressure from piping. If a valve is used to isolate equipment,its closure shall be capable of sealing against test pressure without damage to valve. Flanged joints where blinds are inserted to isolate equipment need not be tested. 5. Install relief valve set at a pressure no more than one-third higher than test pressure, to protect against damage by expanding liquid or other source of overpressure during test. B. Testing: Test hydronic piping as follows: 1. Use ambient temperature water as testing medium,except where there is risk of damage due to freezing. Another liquid may be used if it is safe for workers and compatible with piping system components. 2. Use vents installed at the high points of system to release trapped air while filling system. Use drains installed at low points for complete removal of liquid. 3. Examine system to see that equipment and parts that cannot withstand test pressures are properly isolated. Examine test equipment to ensure that it is tight and that low- pressure filling lines are disconnected. 4. Subject piping system to hydrostatic test pressure that is not less than 1.5 times the design pressure. Test pressure shall not exceed maximum pressure for any vessel, ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15510-9 pump,valve,or other component in system under test. Check to verify that stress due to pressure at bottom of vertical runs does not exceed either 90 percent of specified minimum yield strength or 1.7 times "SE"value in Appendix A of ASME B31.9, Code for Pressure Piping, "Building Services Piping." 5. After hydrostatic test pressure has been applied for at least 10 minutes,examine piping,joints,and connections for leakage. Eliminate leaks by tightening,repairing, or replacing components as appropriate,and repeat hydrostatic test until there are no leaks. 6. Prepare written report of testing. 3.9 ADJUSTING AND CLEANING A. After completing system installation,including outlet fittings and devices,inspect finish. Remove burrs,dirt,and construction debris,and repair damaged finishes including chips, scratches,and abrasions. B. Flush hydronic piping systems with clean water. Remove,clean,and replace strainer screens. After cleaning and flushing hydronic piping system,but before balancing, remove disposable fine-mesh strainers in pump suction diffusers. C. Mark calibrated nameplates of balancing valves after hydronic system balancing has been completed,to permanently indicate final balanced position. D. Chemical Treatment: Provide a water analysis prepared by chemical treatment supplier to determine type and level of chemicals required to prevent scale and corrosion. Perform initial treatment after completing system testing. 3.10 COMMISSIONING A. Fill system and perform initial chemical treatment. B. Glycol systems: Fill system with a 40 percent ethylene-glycol solution after the system has been properly cleaned and rinsed. Provide a tag on the fill with the following information: 1. Date of fill. Contractor responsible for procedure. 2. Manufacturer and trade name of ethylene-glycol product. 3. Percentage of glycol in the system with freeze protection temperature indicated. 4. Gallons of ethylene-glycol required to achieve the percentage of glycol in the system. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15510- 10 C. Verify diaphragm-compression tank has the proper air charge,and that the system is full of water. D. Perform these steps before operating the system: 1. Open valves to fully open position. Close coil bypass valves. 2. Set automatic fill valves for required system pressure. 3. Check air vents at high points of systems and determine if all are installed and operating freely(automatic type)or bleed air completely(manual type). 4. Check and set operating temperatures of boilers,chillers,and cooling towers to design requirements. 5. Lubricate motors and bearings. END OF SECTION ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15510- 11 SECTION 15530 REFRIGERANT PIPING PART 1 -GENERAL 1.1 RELATED DOCUMENTS A. Requirements of the following Division 15 Sections apply to this section. 1. "Basic Mechanical Requirements." 2. "Basic Mechanical Materials and Methods." 1.2 SUMMARY A. This Section includes refrigerant piping used for air-conditioning applications,including pipes,tubing, fittings,and specialties; special-duty valves;and refrigerants. B. Related Sections: The following Sections contain requirements that relate to this Section: 1. Division 7 Section "Joint Sealants" for materials and methods for sealing pipe penetrations through basement walls and fire/smoke barriers. 1.3 SUBMITTALS A. General: Submit each item in this Article according to the Conditions of the Contract and Division 1 Specification Sections. B. Product Data for each valve type and refrigerant piping specialty specified. C. Shop Drawings showing layout of refrigerant piping,specialties,and fittings,including pipe and tube sizes, flow capacities,valve arrangements and locations,slopes of horizontal runs,wall and floor penetrations,and equipment connection details. Show interface and spatial relationship between piping and equipment. 1. Refrigerant piping indicated is schematic only. Size and design the layout and installation of the piping,including oil traps, double risers, specialties,and pipe and tube sizes,to ensure proper operation and conformance with warranties of connected equipment. D. Qualification data for firms and persons specified in the"Quality Assurance"Article to demonstrate their capabilities and experience. E. Maintenance data for refrigerant valves and piping specialties to include in the operation and maintenance manual specified in Division 1 Sections and Division 15 Section "Basic Mechanical Requirements." ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15530 - 1 1.4 QUALITY ASSURANCE A. ASME Compliance: Qualify brazing and welding processes and operators according to ASME Boiler and Pressure Vessel Code, Section IX, "Welding and Brazing Qualifications." B. Regulatory Requirements: Comply with provisions of the following codes: 1. ASME B31.5, "Refrigeration Piping." 2. ASHRAE 15, "Safety Code for Mechanical Refrigeration." C. UL Standard: Provide products complying with UL 207, "Refrigerant-Containing Components and Accessories,Non-electrical";or UL 429, "Electrically Operated Valves." D. Listing and Labeling: Provide products specified in this Section that are UL listed and labeled. 1.5 SEQUENCING AND SCHEDULING A. Coordinate the installation of roof curbs,equipment supports,and roof penetrations. Roof specialties are specified in Division 7 Sections. PART 2-PRODUCTS 2.1 MANUFACTURERS A. Manufacturers: Subject to compliance with requirements,provide products by one of the following: 1. Refrigerants: a. Allied Signal Incorporated;Genetron Refrigerants. b. DuPont Company;Fluorochemicals Division c. Elf Atochem North America,Incorporated d. ICI Americas Incorporated;Fluorochemicals Business 2. Refrigerant Valves and Specialties: a. Danfoss Electronics,Incorporated b. Eaton Corporation;Industrial Control Division ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15530 -2 c. Emerson Electric Company;Alco Controls Division d. Henry Valve Company. e. Parker-Hannifin Corporation;Refrigeration&Air Conditioning Division. f. Sporlan Valve Company. 2.2 PIPES AND TUBES A. Hard Copper Tube: ASTM B 280,Type ACR,drawn temper. B. Soft Copper Tube: ASTM B 280,Type ACR,annealed temper. C. Soft Copper Tube: ASTM B 88,Type K(ASTM B 88M,Type A),annealed temper. 2.3 PIPE AND TUBE FITTINGS A. Copper Fittings: ASME B 16.22,wrought-copper streamlined pattern. 2.4 JOINING MATERIALS A. Brazing Filler Metals: AWS A5.8,Classification BAg-1 (Silver). 2.5 VALVES A. Diaphragm Packless Valves: 500-psig working pressure and 275 deg F working temperature,globe or angle pattern,forged-brass or bronze body and bonnet,phosphor bronze and stainless-steel diaphragms,rising stem and handwheel, stainless-steel spring, nylon seat disc,with solder-end connections. B. Packed-Angle Valves: 500-psig working pressure and 275 deg F working temperature, forged-brass or bronze body,forged-brass seal caps with copper gasket,back seating, rising stem and seat, molded stem packing,with solder-end connections. C. Check Valves--Smaller than 1-Inch NPS: 500-psig operating pressure, 300 deg F operating temperature;cast-brass body,with removable piston,PTFE seat,and stainless- steel spring; straight-through globe design. Valve shall be straight-through pattern,with solder-end connections. D. Check Valves--Larger than 1-Inch NPS: 450-psig operating pressure, 300 deg F operating temperature;cast-bronze body,with cast-bronze or forged-brass bolted bonnet; floating piston with mechanically retained PTFE seat disc. Valve shall be straight- through or angle pattern,with solder-end connections. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15530-3 E. Service Valves: 500-psig pressure rating,forged-brass body with copper stubs,brass caps,removable valve core,integral ball check valve,with solder-end connections. F. Solenoid Valves: Conform to ARI 760;250 deg F temperature rating,400-psig working pressure;forged brass,with PTFE valve seat,2-way straight-through pattern,and solder- end connections;manual operator,with NEMA 250,Type 1 solenoid enclosure with 1t2- inch conduit adapter,and 24-V normally closed holding coil. G. Pressure-Regulating Valves: Conform to ARI 770;pilot operated,forged brass or cast bronze with pilot operator,stainless-steel bottom spring,pressure-gage tappings,24-V dc standard coil,and wrought-copper fittings for solder-end connections. H. Pressure-Regulating Valves: Conform to ARI 770;direct acting,brass with pilot operator,stainless-steel diaphragm,standard coil,and solder-end connections. I. Pressure Relief Valves: Straight or angle brass body and disc,neoprene seat,factory sealed and ASME labeled,for standard pressure setting. J. Thermal Expansion Valves: Conform to ARI 750;thermostatic-adjustable,modulating type;size as required and factory set for superheat requirements;solder-end connections; with sensing bulb,distributor having side connection for hot-gas bypass line,and external equalizer line. K. Hot-Gas Bypass Valve: Adjustable,sized for capacity equal to last step of compressor unloading; solder-end connections. 2.6 REFRIGERANT PIPING SPECIALTIES A. Straight-or Angle-Type Strainers: 430-psig working pressure;forged-brass or steel body with stainless-steel wire or brass-reinforced Monel screen,and screwed cleanout plug, with solder-end connections. B. Straight,Non-Cleanable-Type Strainers: 500-psig working pressure;steel shell with stainless-steel screen,with solder-end connections. C. Moisture/Liquid Indicators: 500-psig operating pressure,200 deg Foperating temperature;forged-brass body,with replaceable,polished,optical viewing window with color-coded moisture indicator,and solder-end connections. D. Replaceable-Core Filter-Dryers: 500-psig operating pressure; steel shell, flange ring,and spring, ductile-iron cover plate with steel cap screws,and wrought-copper fittings for solder-end connections;with replaceable-core kit,including gaskets,as follows: 1. Filter Cartridge: Pleated media with integral end rings,stainless-steel support, ARI 730 rated for capacity. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15530 -4 2. Filter-Dryer Cartridge: Pleated media with solid-core sieve with activated alumina, ARI 730 rated for capacity. 3. Wax Removal Cartridge: Molded,bonded core of activated charcoal and desiccant with integral gaskets. E. Permanent Filter-Dryer: 350-psig maximum operating pressure,225 deg F maximum operating temperature; steel shell,and wrought-copper fittings for solder-end connections; molded-felt core surrounded by desiccant. F. Flanged Unions: 400-psig working pressure,330 deg F maximum operating temperature; 2 brass tailpiece adapters for solder-end connections to copper tubing;forged-steel flanges for 1-to 1-1/2-inch nominal copper-tube size and ductile iron for 2-to 3-inch nominal copper-tube size with 4 plated steel bolts,with silicon bronze nuts and fiber gasket; factory-applied rust-resistant coating on flanges and bolts. G. Flexible Connectors: 500-psig operating pressure; seamless tin-bronze or stainless-steel core,high-tensile bronze-braid covering,solder-end connections,and synthetic covering; dehydrated,pressure tested,minimum 7 inches long. H. Mufflers: 500-psig operating pressure,brazed-steel construction with fusible plug,sized for refrigeration capacity. 2.7 RECEIVERS A. 6-Inch Diameter and Smaller: ARI 495,UL listed,steel,brazed;400-psig pressure rating, with tappings for inlet,outlet,and pressure relief valve. B. More than 6-Inch Diameter: ARI 495,welded steel,tested and stamped according to ASME Boiler and Pressure Vessel Code,Section 8D;400 psig with tappings for liquid inlet and outlet valves,pressure relief valve,and liquid-level indicator. 2.8 REFRIGERANT A. ASHRAE 34,R-22: Monochlorodifluoromethane. PART 3 -EXECUTION 3.1 EXAMINATION A. Examine roughing-in for compliance with requirements for installation tolerances and other conditions affecting performance of refrigerant piping. Do not proceed with installation until unsatisfactory conditions have been corrected. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15530-5 3.2 APPLICATIONS A. Aboveground,within Building: Type ACR drawn-copper tubing. 3.3 INSTALLATION A. Install refrigerant piping according to ASHRAE 15. B. Basic piping installation requirements are specified in Division 15 Section"Basic Mechanical Materials and Methods." C. Install piping in short and direct arrangement,with minimum number of joints,elbows, and fittings. D. Arrange piping to allow normal inspection and service of compressor and other equipment. Install valves and specialties in accessible locations to allow for service and inspection. E. Install piping with adequate clearance between pipe and adjacent walls and hangers,or between pipes for insulation installation. Use sleeves through floors,walls,or ceilings, sized to permit installation of full-thickness insulation. F. Below ground,install copper tubing in conduit. Vent conduit outdoors. G. Insulate suction lines and liquid lines,but insulate them together if adjacent. 1. Do not install insulation until system testing has been completed and all leaks have been eliminated. H. Install branch lines to parallel compressors of equal length,and pipe identically and symmetrically. I. Install copper tubing in rigid or flexible conduit in locations where copper tubing will be exposed to mechanical injury. J. Slope refrigerant piping as follows: 1. Install horizontal hot-gas discharge piping with a uniform slope of 0.4 percent downward away from compressor. 2. Install horizontal suction lines with a uniform slope of 0.4 percent downward to compressor. 3. Install traps and double risers where indicated and where required to entrain oil in vertical runs. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15530-6 4. Liquid lines may be installed level. K. Use fittings for changes in direction and branch connections. L. Install exposed piping at right angles or parallel to building walls. Diagonal runs are not permitted,unless expressly indicated. M. Reduce pipe sizes using eccentric reducer fittings installed with level side down. N. Provide bypass around moisture-liquid indicators in lines larger than 2-inch NPS. O. Install unions to allow removal of solenoid valves,pressure-regulating valves,expansion valves,and at connections to compressors and evaporators. P. Install flexible connectors at the inlet and discharge connection,at right angles to axial movement of compressor,parallel to crankshaft. Q. Install replaceable-core filter-dryers,with isolation valves and valved bypass. R. Install refrigerant valves according to manufacturer's written instructions. S. When brazing,remove solenoid-valve coils;remove sight glasses;and remove stems, seats,and packing of valves,and accessible internal parts of refrigerant specialties. Do not apply heat near bulb of expansion valve. T. Electrical wiring for solenoid valves is specified in Division 16 Sections. Coordinate electrical requirements and connections. U. Mount thermostatic expansion valves in any position,close to evaporator. 1. Where refrigerant distributors are used,mount directly on expansion-valve outlet. 2. Install valve so diaphragm case is warmer than bulb. 3. Secure bulb to clean, straight,horizontal section of suction line using 2 bulb straps. Do not mount bulb in a trap or at the bottom of the line. 4. Where external equalizer lines are required,make connection where it will reflect suction-line pressure at bulb location. V. Install pressure relief valves as required by ASHRAE 15. Pipe pressure relief valves on receivers to outdoors. W. Charge and purge systems,after testing,and dispose of refrigerant following ASHRAE 15 procedures. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15530-7 X. Charge system as follows: 1. Install filter-dryer core after leak test,but before evacuation. 2. Evacuate refrigerant system with vacuum pump,until temperature of 35 deg F is indicated on vacuum dehydration indicator. 3. Maintain vacuum for a minimum of 5 hours. 4. Break vacuum with refrigerant gas and charge to 2 psig. 3.4 HANGERS AND SUPPORTS A. General: Hangers,supports,and anchors are specified in Division 15 Section "Hangers and Supports." Provide according to ASME B31.5 and MSS SP-69. 3.5 PIPE JOINT CONSTRUCTION A. Basic pipe and tube joint construction is specified in Division 15 Section "Basic Mechanical Materials and Methods." B. Fill pipe and fittings with an inert gas(nitrogen or carbon dioxide)during brazing to prevent formation of scale. 3.6 VALVE INSTALLATIONS A. Install refrigerant valves according to manufacturer's written instructions. B. Install globe valves on each side of strainers and dryers,in liquid and suction lines at evaporators,and elsewhere as indicated. C. Mount thermostatic expansion valves in any position,close to evaporator. 1. Where refrigerant distributors are used,mount directly on expansion-valve outlet. 2. Install valve so diaphragm case is warmer than bulb. 3. Secure bulb to clean,straight,horizontal section of suction line using 2 bulb straps. Do not mount bulb in a trap or at the bottom of the line. 4. Where external equalizer lines are required, make connection where it will reflect suction-line pressure at bulb location. D. Install pressure-regulating and relief valves as required by ASHRAE 15. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15530- 8 3.7 SPECIALTIES APPLICATION AND INSTALLATION A. Install liquid indicators in liquid line leaving condenser,in liquid line leaving receiver, and on leaving side of liquid solenoid valves. B. Install strainers immediately upstream of each automatic valve,including expansion valves,solenoid valves,hot-gas bypass valves,and compressor suction valves. C. Install strainers on main liquid line where multiple expansion valves with integral strainers are used. D. Install strainers in suction line of steel pipe. E. Install moisture-liquid indicators in liquid lines between filter-dryers and thermostatic expansion valves and in liquid line to receiver. F. Install pressure relief valves on ASME receivers,and pipe to outdoors. G. Install replaceable-core filter-dryers in vertical liquid line adjacent to receivers and before each solenoid valve. H. Install permanent filter-dryers in low-temperature systems,in systems using hermetic compressors,and before each solenoid valve. I. Install solenoid valves in liquid line of systems operating with single pump-out or pump- down compressor control,in liquid line of single or multiple evaporator systems,and in oil bleeder lines from flooded evaporators to stop flow of oil and refrigerant into suction line when system shuts down. J. Install receivers on systems 5 tons and larger,and on systems with long piping runs,sized to accommodate pump-down charge. K. Install flexible connectors at or near compressors where piping configuration does not absorb vibration. 3.8 CONNECTIONS A. The Drawings indicate the general arrangement of piping, fittings,and specialties. B. Install piping to allow servicing and maintenance and maintenance of equipment.. 3.9 FIELD QUALITY CONTROL A. Inspect and test refrigerant piping according to ASME B31.5,Chapter VI. ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15530-9 1. Pressure test with nitrogen to 200 psig. Perform final tests at 27-psig vacuum and 200 psig using halide torch or electronic leak detector. Test to no leakage. B. Test and adjust controls and safeties. Replace damaged or malfunctioning controls and equipment. C. Repair leaks using new materials;retest. 3.10 ADJUSTING A. Adjust thermostatic expansion valve to obtain proper evaporator superheat requirements. 3.11 COMMISSIONING A. Charge system using the following procedures: 1. Install core in filter dryer after leak test,but before evacuation. 2. Evacuate refrigerant system with vacuum pump until temperature of 35 deg F is indicated on vacuum dehydration indicator. 3. During evacuation,apply heat to pockets,elbows,and low spots in piping. 4. Maintain vacuum on system for minimum of 5 hours after closing valve between vacuum pump and system. 5. Break vacuum with refrigerant gas,allowing pressure to build up to 2 psig. 6. Complete charging of system,using new filter-dryer core in charging line. Provide full-operating charge. END OF SECTION ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15530- 10 SECTION 15575 BREECHINGS,CHIMNEYS,AND STACKS PART 1 -GENERAL 1.1 SUMMARY A. This Section includes the following: 1. Flue vents. 1.2 SUBMITTALS A. General: Submit each item in this Article according to the Conditions of the Contract and Division 1 Specification Sections. B. Product data for each type of product specified. Include materials,dimensions,weights, and accessories. 1.3 QUALITY ASSURANCE A. Manufacturer Qualifications: Firm experienced in manufacturing breechings,chimneys, and stacks similar to those indicated for this Project and that have a record of successful in-service performance. B. Comply with SMACNA"HVAC Duct Construction Standards,Metal and Flexible" for fabricated breechings. C. Comply with ASHRAE"Systems and Equipment Handbook," Chapter 31 for"Chimney, Gas Vent,and Fireplace Systems,"for material requirements and design criteria. D. Listing and Labeling: Provide products specified in this Section that are listed and labeled. 1. The Terms "Listed" and "Labeled": As defined in NFPA 211. 2. Listing and Labeling Agency Qualifications: A"Nationally Recognized Testing Laboratory" (NRTL)as defined in OSHA Regulation 1910.7. E. Single-Source Responsibility: Obtain all Type B vent system components from 1 source and by a single manufacturer. ADDENDUM#2 1607.001 -ORONO ICE ARENA Page 15575 - 1 PART 2-PRODUCTS 2.1 MANUFACTURERS A. Manufacturers: Subject to compliance with requirements,provide products by one of the following: 1. Type B Gas Vents: a. General Products Co.,Inc. b. Hart&Cooley,Inc. c. Leslie-Locke Inc. d. Masco Corp.;American Metal Products Co. e. Selkirk Metalbestos. f. Simpson Dura-Vent. g. Van-Packer Co. 2.2 TYPE B GAS VENTS A. Description: Double-wall gas vents,conforming to NFPA 211,Type B. Inner pipe of sheet aluminum, outer pipe of galvanized-steel sheet,each with the following minimum thicknesses: 1. Round,6-Inch Inside Diameter and Smaller: 0.012-inch inner pipe,0.0187-inch outer pipe. 2. Round,7-to 18-Inch Inside Diameter: 0.014-inch inner pipe,0.0187-inch outer pipe. 3. Round,20-to 24-Inch Inside Diameter: 0.018-inch inner pipe,0.0217-inch outer pipe. 4. Oval,4-Inch(102-mm) Size and Smaller: 0.012-inch inside pipe,0.0187-inch outer pipe. 5. Oval, 5-to 6-Inch Size: 0.014-inch inside pipe,0.0187-inch outer pipe. B. Accessories: Tees,elbows, increasers,draft hood connectors,metal cap with bird barrier, adjustable roof flashing, storm collar,support assembly,thimbles,firestop spacers, and fasteners, fabricated of similar materials and designs as vent pipe straight sections. ADDENDUM#2 1607.001 -ORONO ICE ARENA Page 15575 -2 PART 3 -EXECUTION 3.1 INSTALLATION OF DOUBLE-WALL CONNECTORS,BREECHINGS,AND VENTS A. Install gas vents as indicated,according to manufacturer's written installation instructions. Locate to comply with stipulated minimum clearances from combustibles. B. Seal between sections of positive-pressure vents according to manufacturer's installation instructions,using only sealants recommended by manufacturer. C. Support vents at intervals recommended by the manufacturer to support the weight of the vent and all accessories,without exceeding loading of appliances. 3.2 CLEANING A. After completing system installation,including outlet fittings and devices,inspect exposed finish. Remove burrs,dirt,and construction debris, and repair damaged finishes, including chips, scratches,and abrasions. B. Clean breechings internally during installation to remove dust and debris. Clean external surfaces to remove welding slag and mill film. Grind welds smooth. 3.3 PROTECTION A. Temporary Closure: Provide at ends of breechings and chimneys that are not completed or connected to equipment. END OF SECTION ADDENDUM#2 1607.001 -ORONO ICE ARENA Page 15575 -3 SECTION 15610 FURNACES PART 1 -GENERAL 1.1 RELATED DOCUMENTS A. Requirements of the following Division 15 Sections apply to this section: 1. "Basic Mechanical Requirements." 2. "Basic Mechanical Materials and Methods." 1.2 SUMMARY A. This Section includes furnaces and accessories listed below,complete with controls. 1. Gas-Fired Furnaces. 2. Cooling Coils for Furnaces. 3. Controls. B. Related Section: The following Sections contain requirements that relate to this Section: 1. Division 15 Section "Motors" for motors used in furnaces. 2. Division 15 Section "Breechings,Chimneys,and Stacks" for vents for oil-fired furnaces and conventional gas-fired furnaces. 3. Division 15 Section "Condensing Units" for condensing units used with cooling coils provided in furnaces. 4. Division 15 Section "Refrigerant Piping" for piping and connections for cooling coils provided in furnaces. 1.3 DEFINITIONS A. AFUE: Minimum annual fuel utilization efficiency certified by an independent testing agency in accordance with US Department of Energy Test Procedures. B. Control Wiring: Wire, conduit,and miscellaneous materials for mounting and connecting electric control devices. C. Furnace: A self-contained,indirect-fired or electrically heated appliance,with or without cooling coils,that supplies conditioned air through ducts to spaces that require it. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15610- 1 1. Gas Furnaces: a. Bryant BDP Div.,United Technologies. b. Carrier Corp. c. Hastings d. Lennox Industries,Inc. e. The Trane Co. 2.2 FURNACES,GENERAL A. Configuration: Horizontal with cooling coil. B. Gas-Fired Furnaces and Accessory Items: NFPA 54, "National Fuel Gas Code." 1. AGA Approval: Furnaces shall bear the label of the American Gas Association. 2. Type of Gas: Furnaces shall be listed for use with natural gas. C. Provide fu nace types and minimum ratings and capacities as indicated. D. Provide furnaces that are factory assembled,piped,wired,and tested. E. Cabinet: Steel with foil-faced,glass fiber interior insulation. Lift-out panels expose burners,and all other items requiring access for maintenance. F. Main Fan: Centrifugal-type,factory-balanced,resilient-mounted steel. G. Motors: Energy efficient type as specified in Division 15 Section "Motors."Totally enclosed,with internal thermal protection and permanent lubrication. 2.3 GAS-FIRED FURNACES,MEDIUM EFFICIENCY A. General: Comply with ANSI Z21.47,Gas-Fired Central Furnaces. B. Efficiency: AFUE 78 percent,minimum. C. Automatic Fan Thermal Switch: Delays fan start until discharge air is heated. Delays fan shutdown until air cools to comfort threshold. D. Summer Fan Relay: Connected to permit independent remote 24 V a.c.on-off switching of unit fan. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15610-3 E. Automatic Gas Control: Single-stage,24 V a.c.valve. F. Ignition: Electric spark or hot surface ceramic igniter with flame sensor. G. Venting: Atmospheric. H. Venting: Power venting,using integral centrifugal fan and side wall vent termination. 2.4 CONTROLS A. General: Include control components required for satisfactory operation of furnaces and auxiliary equipment in all seasons,including: 1. Control Transformer: 24 V a.c.output,factory-installed,and wired in furnace. 2. Thermostat: 24 V a.c. solid-state,programmable,microprocessor-based wall mounting unit with automatic switching from heating to cooling,preferential rate control, multiple temperature presets selectable by day and time,and battery backup protection of program settings against power failure. 3. Relays: As required to achieve specified operation. B. Wire and Cable: Specified in Division 16 Section "Wires and Cables." 2.5 FINISHES A. External Casings and Cabinets: Baked enamel over corrosion-resistant treated surface. PART 3 -EXECUTION 3.1 INSTALLATION AND CONNECTION A. Installation and connection of gas-fired furnaces and associated fuel and vent features and systems shall be in accordance with NFPA 54,applicable local codes and regulations,and manufacturer's published installation instructions. 1. Connect gas piping in accordance with Division 15 Section "Natural Gas Systems." 2. Connect vents in accordance with Division 15 Section "Breechings,Chimneys and Stacks." 3. Vents, Outside Air Pipe Connections,and Drains: Where PVC piping is used,install in accordance with Division 15 Section "Basic Piping Materials and Methods." Install vent terminal designed to protect against entrance of birds,insects,and dirt. ADDENDUM#2 1607.001 -ORONO ICE ARENA (CP-2) Page 15610-4 4. Connect condensate drain pans using Type M copper tubing with streamline drainage fittings and soldered joints. Extend to nearest equipment drain or floor drain. Construct vented,deep trap at connection to drain pan and install cleanouts at changes in direction. Terminate to suit local code requirements,except where stricter methods are indicated. B. Base-Mounted Units: Secure units to substrate. Provide optional bottom closure base where installation conditions require. C. Controls: Conform to Division 15 Section "Electric Control System." D. Controls: Install thermostats where indicated. 1. Control Wiring: Install control wiring as specified in Division 16 Section"Wires and Cables." 2. Control Wiring: Install in compliance with NEC. Install cables and conductors simultaneously where more than one can be installed with the same routing. Bundle cables neatly together. Conceal all cable in finished spaces. Install exposed cable parallel and perpendicular to surfaces or exposed structural members,and follow surface contours,where possible. Make splices and connections only within junction boxes and equipment enclosures. Use connectors which are compatible with conductor material. Make terminations so there is no bare conductor at terminals. Provide substantial support for wiring and run clear of equipment access paths. E. Connect ducts in accordance with Division 15 Section"Metal Ductwork." 3.2 COMMISSIONING A. Test functions,operations,and control sequences and protective features. Adjust to assure operation is in accordance with specification. B. Correct deficiencies identified by tests and observations and retest until specified requirements are met. 3.3 CLEANING AND ADJUSTING A. Cleaning: Upon completion of installation, inspect furnaces and associated components. Remove paint splatters and other spots, dirt, and debris. Touch up scratches and mars of fmish to match original finish. Clean unit internally using methods and materials recommended by manufacturer. B. Adjusting: Make control,burner,and other adjustments for optimum heating performance and efficiency. Adjust heat distribution features,including shutters,dampers,and relays to provide optimum heating performance and system efficiency. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15610- 5 3.4 DEMONSTRATION A. Training: Arrange and pay for the services of a factory-authorized service representative to demonstrate adjustment,operation,and maintenance of furnaces and to train Owner's personnel. B. Conduct a minimum of 2 hours of training as specified under"Instructions to Owner's Employees"in the"Project Closeout" Section of these specifications. C. Schedule training with at least seven days advance notification. END OF SECTION ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15610 -6 SECTION 15620 FUEL-FIRED HEATERS PART 1 -GENERAL 1.1 RELATED DOCUMENTS A. Requirements of the following Division 15 Sections apply to this section: 1. "Basic Mechanical Requirements." 2. "Basic Mechanical Materials and Methods." 1.2 SUMMARY A. This Section includes the following: 1. Gas-fired unit heaters. B. Related Sections: The following Sections contain requirements that relate to this Section: 1. Division 15 Section "Breechings,Chimneys,and Stacks" for vents for heaters. 2. Division 15 Section "Automatic Control Systems" for control for heaters. 1.3 SUBMITTALS A. General: Submit the following in accordance with Conditions of Contract and Division 1 Specification Sections. B. Product data including weights,dimensions,metal gages,and data on features and components. Include plan and elevation views of units,minimum clearances,and data on ratings and capacities. C. Maintenance data for products for inclusion in "Operating and Maintenance Manual" specified in Division 1. D. Wiring diagrams from manufacturers detailing requirements for electrical power and control wiring for heaters. Include ladder-type wiring diagrams for interlock and control wiring required for field installation. Differentiate between portions of wiring that are factory installed and portions that are to be field installed. 1.4 QUALITY ASSURANCE A. Comply with NFPA 70, "National Electrical Code." ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15620- 1 1.5 EXTRA MATERIALS A. General: Furnish extra materials matching products installed,as described below, packaged with protective covering for storage,and identified with labels clearly describing contents. B. Fan Belts: Furnish quantity equal to 15 percent of the number of belts installed for centrifugal fans of unit heaters,but not less than one set. PART 2-PRODUCTS 2.1 MANUFACTURERS A. Manufacturers: Subject to compliance with requirements,provide products by the following: 1. Unit Heaters,Gas, Propeller Fan: a. Hastings Industries,Inc. b. Lennox Industries,Inc. c. Modine Mfg. Co. d. Reznor. e. Sterling Heating Equipment Div. f. The Trane Co. 2. Unit Heaters,Gas,Centrifugal Fan: a. Hustings Fan,Inc. b. Lennox Industries,Inc. c. Modine Mfg. Co. d. The Trane Co. 2.2 FUEL-FIRED HEATERS,GENERAL A. Types,Minimum Ratings,Locations,and Mountings: As indicated. B. Gas-Fired Heaters and Accessory Items: NFPA 54, "National Fuel Gas Code." ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15620-2 1. AGA Approval: Heaters design certified and labeled by the American Gas Association. 2. Type of Gas: Heaters designed and built to burn natural gas with characteristics the same as those of the gas available at the Project site. C. Assembly and Wiring: Heaters factory assembled,piped,wired,and tested. D. Heater Electrical Rating: 115 V a.c.except as otherwise indicated. E. Propeller Fans: Factory-balanced,resilient-mounted,with aluminum blades and 100-percent steel blade guard. F. Centrifugal Fans: Factory-balanced,resilient-mounted, steel,belt driven with adjustable-pitch motor sheave except as otherwise indicated. G. Motors: Totally enclosed with internal thermal overload protection and complying with Division 15 Section "Motors,"except as otherwise indicated. 1. Heater Motors: Energy efficient types as defined in Division 15 Section "Motors." H. Concentric Terminal Vent Assembly: Combined combustion air inlet and power vent outlet. Include adapter assembly for connection to inlet and outlet pipes,and flanges for wall penetration. I. Control Transformer: Integrally mounted. 120 V a.cJ24 V a.c. 2.3 GAS-FIRED UNIT HEATERS,CONVENTIONAL A. General: Comply with ANSI Z83.8, "Gas Unit Heaters." B. Housing: Steel,with integral draft hood and inserts for suspension mounting rods. C. Venting Provision: Gravity. D. Burners: Cast iron or aluminized steel with stainless-steel inserts. E. Automatic Fan Thermal Switch: Delays fan start until discharge air is heated. Delays fan shutdown until air cools to comfort threshold. F. Summer Fan Relay: Connected to permit remote 24 V a.c. on-off switching of unit fan independently of heater. G. Heat Exchanger: Aluminized steel. H. Unit Fan Type: Propeller. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15620-3 I. Automatic Gas Control: Two-stage, 24 V a.c.valve. J. Ignition: Standing pilot. K. Discharge Louvers: Independently adjustable horizontal blades. L. Discharge Nozzle: Adjustable for discharge at 45 degrees to 65 degrees from horizontal. 2.4 TEMPERATURE CONTROL A. Wires and cables are specified in Division 16. B. Sensors,Components,and Wiring: Specified in Division 15 Section"Electric Control Systems." C. Thermostat: Single-stage,24-V a.c.,wall-mounting type with 50-90 deg F operating range and "fan-only" switch. 2.5 FINISHES A. External Casings and Cabinets: Baked enamel over corrosion-resistant treated surface. PART 3 -EXECUTION 3.1 INSTALLATION AND CONNECTION A. Installation and connection of gas-fire heaters and associated fuel and vent features and systems installed and connected in accordance with NFPA 54,applicable local codes and regulations,and manufacturer's printed installation instructions. 1. Connect gas piping in accordance with Division 15 Section "Natural Gas Systems." 2. Connect vents in accordance with Division 15 Section "Breechings,Chimneys and Stacks." B. Suspended Units: Suspend from substrate using threaded rods,spring hangers,and building attachments. Secure rods to unit hanger attachments. Adjust hangers so unit is plumb and level. 1. Spring hangers are specified in Division 15 Section "Vibration, Sound, and Seismic Control." C. Controls: Wiring and connections are specified in Division 16 Section "Wires and Cables." D. Install controls as specified in Division 15 Section "Electric Control System." ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15620 -4 3.2 COMMISSIONING A. Test functions,operations,and control sequences and protective features. Adjust to assure operation is in accordance with design. B. Correct deficiencies identified by tests and observations and retest until specified requirements are met. 3.3 CLEANING AND ADJUSTING A. Cleaning: Upon completion of installation,inspect heaters and associated components. Remove paint splatters and other spots,dirt,and debris. Touch up scratches and mars of finish to match original finish. Clean unit internally using methods and materials recommended by manufacturer. B. Adjusting: Make burner and other unit adjustments for optimum heating performance and efficiency. Adjust heat distribution features,including louvers,vanes,shutters,dampers, and reflectors,to provide optimum heat distribution for objects,personnel,and spaces served. 3.4 DEMONSTRATION A. Training: Arrange and pay for the services of a factory-authorized service representative to demonstrate adjustment,operation, and maintenance of heaters and heater systems and to train Owner's personnel. 1. Conduct a minimum of 2 hours of training as specified under"Instructions to Owner's Employees" in the"Project Closeout" Section of these specifications. 2. Schedule training with at least 7-day advance notification. END OF SECTION ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15620-5 SECTION 15625 DIRECT FIRED GAS MAKEUP AIR HEATERS PART 1 -GENERAL 1.1 RELATED DOCUMENTS A. Requirements of the following Division 15 Sections apply to this section: 1. "Basic Mechanical Requirements." 2. "Basic Mechanical Materials and Methods." 1.2 SUMMARY A. This Section Includes Direct Fired Gas Makeup Air Heaters. B. Related Sections: The following Sections contain requirements that relate to this Section: 1. Division 15 Section "Automatic Control Systems" for control for heaters. 2. Division 16 Section "Wires and Cables" for power and control wiring of heating units. 1.3 SUBMITTALS A. General: Submit each item in this Article according to the Conditions of the Contract and Division 1 Specification Sections. B. Product Data for each heater including weights,dimensions,metal gages,and data on features and components. Include plan and elevation views of units,minimum clearances, and data on ratings and capacities. C. Shop Drawings detailing layout and installation of heaters including plans,elevations, sections, details of components,and attachments to other units of Work. D. Wiring diagrams from manufacturer for electrically operated units detailing wiring for power and control systems and differentiating between manufacturer-installed and field- installed wiring. E. Maintenance data for heaters to include in the operation and maintenance manual specified in Division 1. ADDENDUM#2 607.001 -ORONO ICE ARENA(CP-2) Page 15625 - 1 1.4 QUALITY ASSURANCE A. Electrical Component Standard: Provide components that comply with NFPA 70 and that are listed and labeled by UL where available. 1.5 WARRANTY A. General Warranty: The special warranty specified in this Article shall not deprive the Owner of other rights the Owner may have under other provisions of the Contract Documents and shall be in addition to,and run concurrent with,other warranties made by the Contractor under requirements of the Contract Documents. B. Manufacturer's Special Warranty on Heaters: Submit a written warranty signed by manufacturer agreeing to replace components within specified warranty period indicated below. Warranty covers failure due to normal conditions of use. 1. Special Warranty Period: Manufacturer's standard but not less than 5 years after date of installation. 1.6 EXTRA MATERIALS A. Furnish extra materials described below that match products installed,are packaged with protective covering for storage,and are identified with labels describing contents. 1. Fan Belts: Furnish one belt for each heater with belt-driven fans. PART 2-PRODUCTS 2.1 MANUFACTURERS A. Manufacturers: Subject to compliance with requirements,provide products by one of the following: a. Rupp Industries Incorporated b. Sterling Gas-Fired Heating Equipment Division c. Industrial Air Systems,Incorporated d. Titan 2.2 DIRECT FIRED GAS MAKEUP AIR HEATERS A. General: The direct fired gas makeup air heater shall be fired and tested at the factory. B. Comply with AGA Z83.18, "Direct Fired Gas Heaters." ADDENDUM#2 607.001 -ORONO ICE ARENA(CP-2) Page 15625 -2 1. AGA Approval: Bear label of American Gas Association. 2. ETL Approval 3. Type of Gas: Natural. C. Assembly and Wiring: Heaters factory assembled,piped,wired,and tested. D. Housing: G90 galvanized steel,with integral inserts for suspension mounting rods. 1. External Casings and Cabinets: G90 Galvanized Steel E. Burner: Direct fire,draw through type sized to provide the scheduled output at the indicated gas pressure. Flame shall burn over the entire length of the burner at all times. 1. Provide non-clogging stainless steel combustion baffles attached to a cast iron gas supply section. The burner shall be capable of 100 percent thermal efficiency with a turndown ration of 30 to 1. 2. The pilot package shall be arranged so the flame from the pilot lights the burner with instantaneous ignition. Pilot assembly shall include: flame rod,spark rod and pilot. The flame rod rectification system shall be used to"prove"the pilot and flame. F. Unit Fan Type: Centrifugal fan, factory balanced,resilient mounted,steel,belt driven with adjustable-pitch motor sheave. 1. Motors: Totally enclosed with internal thermal overload protection and complying with Division 15 Section "Motors." G. Gas Equipment 1. Pilot gas regulator and shut off valve 2. Main gas regulator and shut off valve 3. Two solenoid valves 4. Modulating gas valve(30:1) 5. Burner H. Safety Controls 1. Motor starter with adjustable overloads. 2. Air flow safety switch ADDENDUM#2 607.001 -ORONO ICE ARENA(CP-2) Page 15625 - 3 3. Electronic flame safety relay. 4. High temperature limit switch with manual reset. 5. Starter Interlock. 6. Control System fuse. 7. Fused Disconnect switch. I. Dampers: Refer to Division 15 Section"Duct Accessories"for damper requirements. 1. Intake damper and control:Factory install a two position motor operated damper with internal end switch to energize the blower starter circuit,when the damper is 80% open. J. Filter Section: Filter section casing shall be constructed of heavy gauge G90 galvanized steel with hinged access doors,and internal"V"bank filter support slides. 1. Filters: 2" Thick adhesive coated,aluminum mesh cleanable filters with aluminum frames. K. Remote Control Panel 1. Operating lights shall indicate;flame failure,low temperature unit outage,burner on, and blower on. 2. Clogged filter switch and indicating light to signal when filters are dirty and require service. 3. Audible alarm to signal when unit shuts down on failure of the burner to ignite. 2.3 TEMPERATURE CONTROL A. Wires and cables are specified in Division 16 Section"Wires and Cables." B. Room Over Ride Of Discharge Air Temperature Control: The burner flame shall be modulated to compensate for outdoor air temperature changes sensed by a discharge air temperature sensor with a room temperature over ride thermostat to maintain room temperature. The heater blower operation shall be controlled by a"Summer-Off-Winter" selector switch and exhaust system interlock. 1. Maxitrol 402M electronic flame modulation,remote control panel with temperature selector dial and a"Summer-Off-Winter" selector switch and room over ride thermostat. ADDENDUM#2 607.001 -ORONO ICE ARENA(CP-2) Page 15625 -4 ' 1 PART 3 -EXECUTION 3.1 INSTALLATION A. Install heaters according to manufacturer's written instructions. B. Install and connect gas-fired heaters and associated fuel and systems,installed and connected according to NFPA 54,applicable local codes and regulations,and manufacturer's printed installation instructions. C. Suspended Units: Suspend from substrate using threaded rods,spring hangers,and building attachments. Secure rods to unit hanger attachments. Adjust hangers so unit is plumb and level. 1. Spring hangers are specified in Division 15 Section "Vibration Control." D. Controls: Wiring and connections are specified in Division 16 Section "Wires and Cables." E. Install controls as specified in Division 15 Section"Automatic Control Systems" 3.2 CONNECTIONS A. Piping installation requirements are specified in other Division 15 Sections. Drawings indicate general arrangement of piping,fittings,and specialties. Specific connection requirements are as follows: 1. Install piping adjacent to machine to allow service and maintenance. 2. Gas Piping: Conform to applicable requirements of Division 15 Section"Natural Gas Piping Systems." Connect gas piping to gas train inlet;provide union with sufficient clearance for burner removal and service. Provide AGA-approved flexible units. B. Connect ducts according to Division 15 Section "Metal Ducts." C. Electrical: Conform to applicable requirements of Division 16 Sections. 1. Install electrical devices furnished with heaters but not specified to be factory mounted. D. Connect heaters and components to wiring systems and to ground as indicated and instructed by manufacturer. Tighten electrical connectors and terminals,including grounding connections,according to manufacturer's published torque-tightening values. Where manufacturer's torque values are not indicated,use those specified in UL 486A and UL 486B. ADDENDUM#2 607.001 -ORONO ICE ARENA(CP-2) Page 15625 - 5 3.3 ADJUSTING AND CLEANING A. Adjust burner and other unit components for optimum heating performance and efficiency. Adjust heat distribution features to provide optimum heat distribution for objects,personnel,and spaces served. B. After completing system installation,inspect heaters and associated components. Repair scratches and mars of finish to match original finish. Clean unit internally using methods and materials recommended by manufacturer. 3.4 COMMISSIONING A. Startup Services: Provide startup service,as specified below. 1. Start units and operate controls and safeties. 2. Test and adjust controls and safeties. Replace damaged or malfunctioning controls and equipment. 3. Correct deficiencies identified by tests and observations and retest until specified requirements are met. END OF SECTION • ADDENDUM#2 607.001 -ORONO ICE ARENA(CP-2) Page 15625 -6 SECTION 15670 CONDENSING UNITS PART 1 -GENERAL 1.1 RELATED DOCUMENTS: A. Requirements of the following Division 15 Sections apply to this section: 1. "Basic Mechanical Requirements." 2. "Basic Mechanical Materials and Methods." 1.2 SUMMARY: A. Section includes: 1. Air-cooled condensing units larger than 5 tons capacity. 1.3 SUBMITTALS: A. Product Data: Submit manufacturer's technical product data,including rated capacities of selected model clearly indicated,weights (shipping,installed,and operating),dimensions, required clearances,and methods of assembly of components, furnished specialties and accessories;and installation and start-up instructions. B. Wiring Diagrams: Submit ladder-type wiring diagrams for power and control wiring required for final installation of condensing units and controls. Clearly differentiate between portions of wiring that are factory-installed and portions to be field-installed. C. Operation and Maintenance Data: Submit maintenance data and parts list for each condensing unit,control,and accessory;including"trouble shooting" maintenance guide; plus servicing, and preventative maintenance procedures and schedule. Include this data and product data in maintenance manual; in accordance with requirements of Division 1. 1.4 QUALITY ASSURANCE: A. Codes and Standards: 1. Capacity ratings for condensing units shall be in accordance with ARI Standard 210/240 "Standard for Commercial and Industrial Unitary Air-Conditioning Equipment". Sound ratings shall be in accordance with ARI Standard 270. 2. Refrigeration system of condensing units shall be constructed in accordance with ASHRAE Standard ASHRAE 15 "Safety Code for Mechanical Refrigeration". ADDENDUM#2 1607.001 -ORONO ICE ARENA (CP-2) Page 15670- 1 3. Condensing units shall meet or exceed the minimum COP/Efficiency levels as scheduled on the drawings. 4. Condensing units shall be listed by UL and have UL label affixed. 1.5 DELIVERY, STORAGE,AND HANDLING: A. Handle condensing units and components carefully to prevent damage. Follow manufacturer's written instructions for rigging. Replace damaged condensing units or components. B. Store condensing units and components in clean dry place off the ground. Protect from weather,water,and physical damage. 1.6 SPECIAL PROJECT WARRANTY: A. Warranty on Motor/Compressor: Provide written warranty,signed by manufacturer, agreeing to replace/repair,within warranty period,motors/compressors with inadequate or defective materials and workmanship, including leakage,breakage,improper assembly,or failure to perform as required;provided manufacturer's instructions for handling, installing,protecting,and maintaining units have been adhered to during warranty period. Replacement is limited to component replacement only,and does not include labor for removal and reinstallation. 1. Warranty Period: 5 years from date of substantial completion. PART 2- PRODUCTS 2.1 AIR-COOLED CONDENSING UNITS 5 TONS CAPACITY AND LARGER: A. Manufacturers: Subject to compliance with requirements,provide air-cooled condensing units of one of the following: 1. Carrier Air Conditioning;Division of Carrier Corp. 2. McQuay Air Conditioning Group; Snyder General. 3. Trane (The)Co;Division American Standard Inc. 4. York;Division of York International. B. General: Factory-assembled and tested air-cooled condensing units,consisting of casing, compressors,condensers,coils,condenser fans and motors,and unit controls. Capacities are scheduled on the Drawings. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15670-2 C. Unit Casings: designed for outdoor installation and complete with weather protection for components and controls,and complete with removable panels for required access to compressors,controls,condenser fans,motors, and drives. Additional features include: 1. Steel,galvanized or zinc-coated,for exposed casing surfaces,treated and finished with manufacturer's standard paint coating; 2. Lifting lugs to facilitate rigging of units; 3. Factory-installed rigid metal grilles,for protection of condenser coil during shipping, installation,and operation; 4. Hinged and gasketed control panel door. D. Compressors: reciprocating hermetic or semi-hermetic compressors, 1,750 RPM, designed for air-cooled condensing,complete with crankcase sight glass,crankcase heater,and back-seating service access valves on suction and discharge ports. Capacity shall be controlled through cylinder unloading or staging multiple compressors. The number of compressors and stages are scheduled on the drawings. Additional features include: 1. Crankcase heater in well within crankcase; E. Controls: Operating and safety controls shall include high and low pressure cutouts,oil pressure cutout,compressor winding thermostat cutout,3-leg compressor overload protection, and condenser fan motors with thermal and overload cutouts. Control transformer if required shall be 115-volts. Provide magnetic contactors for compressor and condenser fan motors. Additional features include: 1. Reset relay circuit for manual resetting of cutouts from remote thermostat location; 2. Automatic non-recycling pump down,and timing device to prevent excessive compressor cycling; 3. Unfused disconnect switch,factory-mounted and wired,for single external electrical power connection. 4. Low ambient lockout thermostat. F. Condensing Section: Condenser coil shall be seamless copper tubing mechanically bonded to heavy-duty,configurated aluminum fms, with separate and independent refrigeration circuit for each compressor. Units shall include liquid accumulator and sub- cooling circuit, and back-seating liquid line service access valve. Condenser coils shall be factory-tested at 450 psig,vacuum dehydrate,and filled with a holding charge of nitrogen. ADDENDUM#2 1607.001 - ORONO ICE ARENA(CP-2) Page 15670-3 G. Condenser fans and drives: propeller-type condenser fans for vertical air discharge;either direct drive or belt drive. Additional features include: 1. Permanent lubricated ball bearing condenser fan motors; 2. Separate motor for each condenser fan; 3. Constant speed condenser fan motors; 4. Each fan assembly shall be dynamically and statically balanced. H. Air cooled condensing units and evaporators shall be of the same manufacture. PART 3 -EXECUTION 3.1 INSTALLATION: A. General: Install condensing units in accordance with manufacturers installation instructions. Install units plumb and level,firmly anchored in locations indicated,and maintain manufacturer's recommended clearances. B. Support: 1. Install ground-mounted units on 4" thick reinforced concrete pad,4"larger on each side than condensing unit. Concrete is specified in Division 3. 2. Air-Cooled Condensing Units: Connect refrigerant piping to unit;maintain required access to unit. a. Install furnished field-mounted accessories. C. Connections: Refrigerant piping and electrical conduit connecting to condensing units mounted on vibration isolators,shall have a flexible connector located between the unit and the first anchoring device as close to the unit as possible. 3.2 FIELD QUALITY CONTROL: A. Piping: Verify refrigeration piping is installed in accordance with the condensing unit manufacturers recommendations before startup. B. Testing: 1. Charge systems with refrigerant and oil,and test for leaks. Repair leaks and replace lost refrigerant and oil. 2. Verify proper compressor rotation. ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15670-4 3.3 DEMONSTRATION: A. Provide services of manufacturer's authorized service representative to provide start-up service and to instruct Owner's personnel in operation and maintenance of condensing units. B. Start-up condensing units,in accordance with manufacturer's start-up instructions. Test controls and demonstrate compliance with requirements. Replace damaged or malfunctioning controls and equipment. C. Train Owner's personnel on start-up and shut-down procedures,troubleshooting procedures,servicing,and preventative maintenance schedule and procedures. Review with the Owner's personnel,the data contained in the Operating and Maintenance Manuals specified in Division 1. 1. Schedule training with Owner,provide at least 7-day prior notice to Architect/Engineer. END OF SECTION ADDENDUM#2 1607.001 -ORONO ICE ARENA(CP-2) Page 15670- 5 1s1 TYP. 8 8 • s' ■ 9 TRENCH ri • 0901 SECTION AA 6" WTR. tO LA! • 31.33' INV. 997.0e pi pi • \ U 125' -4I rd g ` STAIR o \ i i NOTE: WATERLINE MUST HAVE 7.5' MIN. COVER AS SPECIFIED IN SPEC. SECTION 02220. UTILITIES AT BUILDING . SCALE30' ORONO ICE R1 HGAHAMMEL GREEN &ABRAHAMSON INC DATE ARCHITECTS &ENGINEERS 21 NOV. 1996 ARENA 1201 HARMON PLACE DRAM MINNEAPOLIS, MINNESOTA 55403 R.A.W. C 3 5 0 COMM. NO. Orono Roeloh AeoeeLttem 1607.001.00 Orono. Iiimunumatinumhm.... t. A-Clf C,ILINC9 tr g'I, &Yr, P,s7 U _ V54,1' @ 04, — X'(ENb '-o 111-uC J: PSP-Ptd - - 'J I l�2' =1I_4e nMnMnun..munMnunu!ll - r J i tahr.4--ft-tc, '1- r_ Get twit-Je -+�L�tT Jon.IT ,'&i- cetLIt.4& it t-- -t '7/e Cr<P bt' Ov ,�5 u �..L -.X'({✓t.IC� To lil'fN.JL'(UKE ei27 f UtRip T Pj �ofFIT 'f ll- 4-410 Pt"i_ I '_oi► ORONO ICE ARENA(CP-2) 1607.001.00 ORONO, MINNESOTA 7&8/A202 • : ii te-OOM Iib V$,Lt)H C -416R.,D bf,f\V .1 TSP • is GON'f - (410+ 1 O I t4 - - - 1 Int no.r c2 (o'-o" 0.'. --4° 0 - C=PCA WA.I A.4) g1-lim/.) F- . -_.:, OWN 1°1NIeoN- 'flip J' E.'1' - .. .,. ... ... . :.. .:..„ .„.0 . •. :,..,...„:„.. .„...,• •• ••• :..: / [___ _ i L _ 1 Z0. G R �Cto, 3 J TM. L Logy.`( 6,1.x$ ORONO ICE ARENA(CP-2) 1607.001.00 ORONO, MINNESOTA 12/A202 2" y I)?',o' i v_0ti _..; z . —7Z- i—/-7,— --,- —---,.7 t __,_ SIN 1 1 /r 1 N _,_.., ,...... , ,. 12 DCP wt.t_. �— -I -�—----- —-7----i--s- — ---1—--- j 1 CcbINLetC�i W/ I \\ \\ i I T I \G N � - I T 1 -44 1 '14II ipew ?LM4• ,/ N - -- I Vihi, GPPal4(9 / / // \' — • / N / I 1 cn GfNJ�N4 N \ ( I 1 A'str .A 1 N N tr....,?c • �' 4"Ply ----- .., ,.....N. (4) _A- ,NIKO eLl /2uI1,oli f 211 -61-0" 1 i-o' '�,-2" i YFY. 12I'Dap -,$) —7—/_/=-_-___--- -*,-----./ r- — — -- --) K.A.4 wm.A., cAt,IN —\v/Awly-A. N __,. — — I ij � 1 ckt. 12-1‘. OVe v \ I N.1,c,. _9 ! . er PLfw1 =v s as t/A/�i� N I I 1 i4 241scr _" I 1 / / J I itridi eoe,, - 0 I CIo1 N01c9 4 / - CNK /44 ` -" `\ \ ______4 ii 11 PtM'1 bevelo it. 0.-‘4 \\/e12,14. (,�VfiNIte. ORONO ICE ARENA(CP-2) 1607.001.00 ORONO. MINNESOTA 2&31A802 GMu \JALL tiise4.06o144 ti / —411 • / 4 h_ ka]PPoE1-T UN"1'EF- Ot• le - V.4IV 2-x 12 %vooQ e7r.H-- n PNI. k OR- -Co rAippcF. it A- wi I/2" NuNo ue..b.v UaL-ttv 2 CJ iniumom 6uFrT >=x.t rRe -- IIF- c.Mv f S*Ler yte*L - m .X. -14+.1U4o12_ -To Gam► 1vu @ SMO ORONO ICE ARENA(CP-2) 1607.001.00 ORONO, MINNESOTA 6A&6B/A802 6ALva4l ZED u � _ � J�: L21"LX21'2 )< / - 4-164912-013 Ta —gi..,.•- Pr-se -7i. -1 • I ' uT Flu. cP . • .•mob Go21✓ 0 0 . " r'""Nl-if 5642-7 11.IoNl -Co r (4 L - 'EYP 10 • •, SIM !Illi GL3 AI .soJ ill lB •90% SIM n ALUM. alb. rikwt e -Nee EXTERIOR ':O (2 TI4US) ORONO ICE ARENA(CP-2) 1607.001.00 11/A802 ORONO,MINNESOTA 2/A801 'vs 0I► SI% /2 ► , _A 14a14-4 & LL 1. w (--'-- .- i /LuM M24� I ",_A___. . `i Nox Prop b; 1 le r or-Au cfi ,,-,r-- :l; CoLumt4 VR,P +ter I '_ `-. AMU) =il - I - , " /..c..).(..S.L:141L+_.:1....:_;,....; 0 _ Si /J • ©1-. 114110. 1 ,_ .,0 ORONO ICE ARENA(CP-2) 1607.001.00 ORONO, MINNESOTA 12/A802