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Page 2 of 8 ER-5110
<br /> , consists of a '/2-inch-thick (13 mm) rectangular steel plate shafts, and a'/8-inch-diameter(22 mm)bolt compiying with
<br /> welded to 2'/Z-inch-diameter(63.5 mm)steel tubing.Figures ASTM A 193 Grade 67 for 13/;inch(44.5 mm)RCS shafts.
<br /> 4 and 6 illustrate the bracket. 2.3 Design:
<br /> 2.2 Material Specifications: 2,3.1 General:Structural calculatio�s must be submitted to
<br /> 2.2.1 Helix Plates: Material specfications for the helix the buildi�g official for each building,and must be based on
<br /> plates are noted in Tables 1 and 2.The plates have a Class accepted engineering principles. The design method is the
<br /> B-1, hot-dipped galvanized coating compiying with ASTM A Load and Resistance Factor Design Specification in Chapter
<br /> 153. 22,Division II,of the code.The design strengths of individual
<br /> 2.2.2 Mchor Shafts (Lead Sections and Extensions)• �ead sections and extension sections are noted in Tables 1
<br /> The 1'/2-and 13/4 inch(38 and 44.5 mm)square RCS shafts and 2. Factored nominal loads must not exceed the design
<br /> confoRn either to ASTM A 29 and AISI 1044,having minimum strengths.The nominal loads must be factored in accordance
<br /> yield and tensile strengths of 70 and 100 ksi (483 and 689 �h Section A4 o�f the speafication.The actual capac'Ry of the
<br /> MPa), respectively, or to AISI 1530, having minimum yield HELICAL PIER Foundation System depends upon the
<br /> and tensile strengths of 95 and 120 ksi(655 and 827 MPa), analysis of the interaction of the helix plates and the soil,and
<br /> respectively. Mchor shafts have a Class B-1, hot-dipped may be.less than the maximum design strengths noted in this
<br /> galvanized coating complying with ASTM A 153. report. Column buckling of foundation anchors due to
<br /> compression loads,and combined flexural and compressive
<br /> 2.2.3 Foundation Brackets: stresses of foundation anchors used with foundation repair
<br /> 2.2.3.1 Bracket Body. The brackets are formed from '/4-, brackets,shall be induded in the analysis'rf this is deemed
<br /> 5/16-, 3/8 or'/2-inch-thick (6.4, 7.9, 10 or 13 mm) steel that necessary by the building official or structural designer.
<br /> meets or exceeds the requirements of ASTM A 36,and have Construction in Seismic Zones 3 and 4 requires compliance
<br /> , a hot-dipped galvanized coating conforming to Class B-1 of with Section 1809.5.1 of the code.A soil investigation report
<br /> ASTM A 153. is necessary and must include consideration of:
<br /> 2.2.3.2 Pipe Assembly:The pipe in the upper bracket body 1. Soil properties,induding those affecting design.
<br /> of the C150-0121, C150-0298 and C150-0299 foundation 2, Allowable soil bearing pressure.
<br /> repair brackets is cold-formed,welded,and seamless carbon 3. Suitability for use in seismically active areas.
<br /> steel structural tubing.Complying with ASTM A 500 Grade B,
<br /> the steel tube has minimum yield and tensile strengths of 42 4. Information on ground-water table, frost depth and
<br /> and 58 ksi(290 and 400 MPa),respectively.The pipe in the ��sion.
<br /> upper bracket body of the C150-0147 foundation repair 2.3.2 ConnectiontoBulldingStructure:Downward-acting
<br /> bracket is hot-rolled,electrical-resistance-welded,round steel design strengths associated with each foundatlon repair
<br /> tubing. Complying with ASTM A 512 or A 513 Grade 1020, bracket are as follows:C150-0121 —20 kips(89 kN);C150-
<br /> the steel tube has minimum yield and tensile strengths of 50 0298,C150-0299 and C150-0147—40 kips(178 kN);C150-
<br /> ' and 62 ksi (345 and 427 MPa), respectively. All pipe 0239-5 kips(22.2 kN);C150-0132—15 kips(66J kN).The
<br /> assemblies have a Class B-1,hot�Jipped,galvanized coating downward-acting design strength is 5 kips (22.2 kN)for the
<br /> ; complying with ASTM A 153. T150-0085 slab repair bracket.
<br /> 2.2.4 Bolts: Factored design loads must not exceed the design
<br /> i, 2.2.4.1 Steel Foundation Mchor.The sizes and types of strengths for the brackets.The concrete foundation and slab
<br /> ; bolts connecting the steel foundation anchor extensions to must be designed and justified to the satisfaction of the
<br /> lead sections or another e�ension are described in Table 2. building official for concentrated loads due to the foundation
<br /> ! All bolts are hot-dipped galvanized steel. and slab repair brackets. Bearing areas not exceeding 28,
<br /> 34.5, 91.4, and 28 square inches (18,064, 22,258, 7,355,
<br /> 2.2.4.2 Foundation Brackets: 18,064 and 18,064 mm2) shafl be used to calculate the
<br /> , 2.2.4.2.1 Lifting Bolts:The I'rfting bolts for the No. C150- concrete bearing stress at the seat of the C150-0121,C150-
<br /> �, 0121,C150-0298 and C150-0299 foundation brackets have 0147, C150-0239, C150-0298 and C150-0299 foundation
<br /> ', a'/e-inch(22 mm)diameter and comply with SAE J429 Grade brackets, respectively. In addition, ff deemed necessary by
<br /> 5.The lifting bolt for the No. C150-0147 foundation bracket the building official, the effects of reduced lateral sliding
<br /> has a diameter of 1 inch (25 mm) and complies with SAE resistance due to uplift from wind or seismic loads shall be
<br /> J429 Grade 5. considered fnr each project utilizing the C150-0121, C150-
<br /> 2.2.4.2.2 Cross Bolts:Cross bolts for the No.C150-0121, 0147,C150-0298 and C150-0299foundation repairbrackets.
<br /> C150-0298 and C150-0299 foundation brackets have a 2.3.3 Protectlon of Pier and Bracket Materlals:Protection
<br /> diameter of 5/e inch (16 mm) and comply with SAE J429 of the pier and bracket materials must comply with Section
<br /> Grade 5. The cross bolt for the No. C150-0147 foundation 1807.9 of the UBC.
<br /> bracket has a'/e inch (22 mm)diameter and complies with 2,4 Installation:
<br /> SAE J429 Grade 5. 5 2.4.1 General:The HELICAL PIER�Foundation System is
<br /> 2.2.4.2.3 Concrete Anchor Bolts:Anchor bolts shall be /e installed by A. B. Chance Co. certified installers, trained to
<br /> inch (15.9 mm) in diameter for all foundation brackets. install the A. B. Chance Co. HELICAL PIER� Foundation
<br /> Concrete anchor bolts are designed for each project System.
<br /> 2.2.4.3 Light�uty Underpinning Bracket:The bolt for the 2,4.7.1 Foundation Mchors:The foundation anchors are
<br /> light-duty underpinning bracket is a 1-inch�Jiameter(25 mm) installed using rotary motors having forvvard and reverse
<br /> bolt complying with SAE J429 Grade 5. capabilities.The foundation anchors must be positioned and
<br /> 2.2.4.4 Slab Repair Bracket: The bolt for the slab repair angled as specified in the approved plans. Foundation
<br /> bracket is a 1-inch-diameter(25 mm)bolt complying with SAE anchors to be attached to the structure with the C150-0121,
<br /> J429 Grade 5. C150-0147, C150-0298 and C150-0299 foundation repair
<br /> 2.2.4.5 New-construction Foundation Bracket:The bolt brackets are installed at an angle of 3 to 5 degrees from
<br /> used to connect the new-construction foundation bracket to vertical.Foundation anchors attached to structures by means
<br /> the foundation anchor is a 3/;inch-diameter(19.1 mm) bolt ofthe No.C150-02391ight-dutyunderpinning bracket,the No.
<br /> complying with SAE J429 Grade 5 for 1'/Z inch(38 mm)RCS T150-0085 slab repair bracket or the No. C150-0132 new-
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