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HomeMy WebLinkAbout1988-04-25 Resolution 2416A RESOLUTION GRANTING A VARIANCE TO MUNICIPAL ZONING CODE SECTION 10.28, SUBDIVISION 5 FILE #1264 (B) WHEREAS, Tnomas R. Smieja (hereinafter "the applicant") is the owner of the property located at 20 Cygnet Place within the City of Orono (hereinafter "City") and legally described as follows: Lots 1 & 2, Block 2 Swan Lake Addition, Hennepin County, Minnesota (hereinafter "the property"); and WHEREAS, the applicant has applied to the City for a variance to Municipal Zoning Code Section 10.28, Subdivision 5 (B) to permit the construction of a single family residence on a substandard vacant property of area 1.37 acres in the RR-1B zoning district where 2.00 acres minimum lot size is normally required. NOW, THEREFORE, BE IT RESOLVED by the City Council of Orono, Minnesota: FINDINGS 1. This application was reviewed as Zoning File #1264. 2. The property is located in the RR-1B Single Family Lakeshore Residential Zoning District. 3. The Orono Planning Commission reviewed this application on April 18, 1988, and recommended approval of the proposed variance based upon the following findings: A) The lot size is consistent with existing developed lot sizes in the general area. B) The applicant has demonstrated that the lot contains suitable area for primary and alternate drainfield sites, while still allowing the development of the house, driveway, and other normal amenities, without creating a potential health hazard in the neighborhood. C) No adjacent property is available for purchase to make this lot conforming in area. 4. The property has been in single seperate ownership since prior to the rezoning of the property from 1 acre minimum lot size requirement Page 1 of 4 to the current 2 acre requirement in 1975. The property is considered a lot of record in single separate ownership per Section 10.03, Subd v sion 6 A (3) of the Orono Municipal Zoning Code. 5. The property cannot be put to a reasonable use if used under conditions allowed by the offical controls. 6. The plight of the landowner is due to circumstances unique to his property not created by the landowner. 7. The variance, if granted, will not alter the essential character of the locality. 8. The City Council has considered this application, including the findings and recommendations of the Planning Commission, reports by City staff, comments by the applicant, and the effect of the proposed variance on the health, safety and welfare of the community. 9. The City Council finds that the conditions existing on this property are pecular to it and do not apply generally to other property in this zoning district; that granting the variance would not adversely affect traffic conditions, light, air, nor pose a fire hazard or other danger to neighboring property; would not merely serve as a convenience to the applicant, but is necessary to alleviate a demonstrable hardship or difficulty; is necessary to preserve a substantial property right of the applicant; and would be in keeping with the spirit and intent of the Zoning Code and Comprehensive Plan of the City. CONCLUSIONS, ORDER AND CONDITIONS Based upon one or more of the findings noted above, the Orono City Council hereby grants a variance to Municipal Zoning Code Section 10.28, Subdivision 5 (B) to permit the construction of a single family residence on the 1.37 acre vacant property at 20 Cygnet Place, subject to the following conditions: 1. The existing accessory shed shall be moved to a conforming location behind both front lines of the proposed house, prior to issuance of a certificate of occupancy for the house. 2. Driveway access shall be to Cygnet Place and shall be located at least 100' south of the intersection of Watertown Road and Cygnet Place. The driveway routing within the property shall be located so as not to interfere with the primary and alternate drainfield sites. Page 2 of 4 3. Park fee in the amount of $150.00 per the current fee schedule shall be paid with the building permit fee. 4. Authorities granted with this resolution run with the property not with the applicants, but are permissive only and must be exercised by application for a building permit within one year of the date of Council approval, or this variance will expire on that date (April 25, 1989). 5. Violation of or non-compliance with any of the terms and conditions of this resolution shall constitute a violation of the Zoning Code, shall automatically terminate any authority granted herein, and shall be punishable as a misdemeanor. 6. The undersigned applicants and property owners have read, understood and hereby agrees to the terms of this resolution and on behalf of themselves, their heirs, successors and assigns, hereby agree to the recording of this resolution in the chain of title of the property. Adopted by the Orono City Council on this 25th day of April, 1988. ATTEST: Dorothy M. Hallin, City Clerk James R. Grabek, Mayor Property Owner(s) Property owner(s) Page 3 of 4 P y CITY of ORONO �`•»'I :4 1'ust Office Rox 660('rystal Hay. Minnesota fi)3236Municipal Offices o On the North Shore of Lake Minnetonka Building Address: 20 Cygnet Place Owner/Builder: Tom Smieja EXCAVATION AND GRADING 1. The ground surface shall be prepared to receive fill by removing vegetation, noncomplying fill, tot -soil, and other unsuitable matey:als. Sec. 7010(c). 2. Slope steeper than five to one, and a height greater than 5 feet shall be benched as in Sec. 7010(c). 3. The faces of cut and fill slopes shall be prepared and maintained to control against erosion. Sec. 7013(a). FOUNDATION AND MASONRY 4. Footings shall have a minimum depth of 3'6" below finished grade. Sec. 2907 a. 5. All foreign material including water shall be removed from bottom of all footings. Sec. 2605 a. 6. All footings shall be formed, walls, posts, and fireplace footings, etc. Sec. 2606 a. 7. Stepped footings shall be formed so that top and bottom of forms shall be level. Sec 2907 c. 8. Reinforcement bars shall be lapped not less than 30 bar diameters. Sec 2415 f. 9. Reinforcement, where requited, shall be supported and tied in place prior to inspection. Sec. 2607 f. 10. Masonry units in foundation walls shall be 1. with Type S or M mortar. Sec 2403 s. 11. Masonry walls that meet or intersect shall be bc;• d or anchored as required by Sec. 2310. See Sec. 2416 (h). 12. Top blocks shall be FHA blocks or shall be solid grouted or full width tOA,I� �7.ONIR(7C47)?3ST6 I-, ADMINISTRATION A FINANCI• - 473.7358 0 I'('HLIC WORKS - 473-7359 ASSESSING 13. Anchor bolts shall be imbedded 15" into solid masonry, 1/2" diameter 6' o.c. 2 per piece of sill with one located within 12" of each end of each piece. When in solid poured concrete the anchor bolt shall be imbedded 7". Sec. 2907 e. 14. No masonry shall be laid when the temperature of the outside air is below 40 degrees F., unless approved methods are used curing construction to prevent damage to the masonry. Materials to be used and materials to be built upon shall be free from ice and snow. Sec. 2415 a. 15. All wood forms shall be removed before backfilling or completion of the building. Sec. 2516 b. 16. Ends of wood girders entering masonry or concrete walls shall be provided with a 1/2" air space on top, sides and ends unless approved wood of natural resistance to decay or treated wood is used. Sec. 2516 c-5. (We will accept 1/2" insulation board in lieu of the 1/2" air space and then the beam mudded tight. 17. The minimum thickness of concrete floor slab supported directly on the ground shall be not less than 3-1/2". Sec. 2623. 18. Footings supporting wood shall extend at least 6 inches above the adjacent finished grade. Sec. 2907 a. 19. Before concrete is placed, all debris, and ice shall be removed from the spaces to be occupied by the concrete, forms shall be properly coated, and the reiforcements shall be thoroughly clean of ice or other deleterious coatings. Sec. 2605 a. 20. For slab on grade floors the insulation around the perimeter of the f loor shall have a thermal resistance of not less �-han 6.3 and the insulation shall extend downward below the grade line to the design frost line or any equivelent distance horizontally inward from the edge of the floor. ASHRAE 90-75. 21. Bearing walls shall be supported on masonry or concrete foundations or piles or other approved foundation system which shall be of sufficient size to support all loads. FRAMING AND CARPENTRY 22. All foundation sills or plates which are within 8" of finished grade or rest on masonry or concrete slab shall be pressure treated wood. Foundation grade redwood or cedar may be substituted. Sec. 2516 --3-7. (Note with the latter galv. nails should be used). 23. Wood joists of the bottom of wood floors closer than 18" or wood girders closer than 12" to the ground underfloor areas uha11 be pressure treated lumber, or as listed in 2517-c-3. Sec. 2516-c-2. 24. Accessible underfloor areas shall be provided with an 18" x 24" access crawl hole. Sec. 2516-c-2. 25. No wood other than permitted by Sec. 2516-c-3 shall be closer than 6" to any earth unless separated by concrete at least 3" thick with an imper- vious membrane installed between the earth and concrete. Sec. 2516-c-7. 26. The ends of beams or girders supported on masonry or concrete shall have not less than 3" of bearing. Sec. 2517-c. 27. Foundation plates or sills shall be bolted as required by Sec. 2907-e. 28. Girders shall be designed to carry all loads imposed on them, end joints shall occur over supports. When spliced over support, an adequate tie shall be provided. Sec. 2517-c. 29. Each joists shall have not less than 1-1/2" bearing on wood or metal, nor less than 3" on masonry. Sec. 2517-d-2. 30. Joists shall be supported laterally at the ends and at each support by solid blocking not less than 2" in thickness and full depth of joists. Sec. 2517-d-3. 31. Joists framed from opposite sides if a beam, girder or partition shall be lapped at least 4 inches, or the opposing joists shall be tied together in an approved manner. Sec. 2517-d-3. 32. Joists framed into the side of a wood girder shall be supported by framing anchors or on a ledger strip not less than 2"x2". Sec. 2517-d-3. 33. Framing around openings; trimmer and header joists shall be doubled when span exceeds four (4) feet. cec. 2517-d-4. 34. Bearing partition perpendicular to joists shall not be offset from supporting girder walls or partitions, more than the joist depth. Sec. 2517-d-5. 35. Holes borded in joists shall not be within 2" of top or bottom - the diameter of any such hole shall not exceed 1/3 of the depth of the joist. Sec. 2517-d-3. 36. Notches in the top or bottom of joists shall not exceed 1/6 the depth, and shall not be located in the middle 1/3 of the space. Sec. 2517-d-3. 37. Joints in subflooring shall occur over supports. Sec. 2517-e-1. 38. Utility studs shall support not more than a roof and ceiling load. Sec. 2517-g-1. 39. When bearing studs are spaced at 24" intervals and top plates are less than 2-2 x 6 or 2-3 x 4 members and when the f loor joists, f loor trusses or roof trusses which they support are spaced at more than 16" intervals, such Joists or trussess shall bear within 5" of the studs beneath or a third plat shall be installed. 40. Studs shall be placed with their wide dimension perpendicular to the wall. Sec. 2517-g-2. 41. Not less than 3 studs shall be installed at every corner of an exterior wall, unless other approval by Building Official. Sec. 2517-g-2. 42. Studs in bearing and exterior walls shall be capped with double plates, installed to provide over -lapping <tt corners and partitions. Sec. 2517-g-2. 43. End joints in double plats shall be offset a minimum of 48". Sec. 2517-g-2. 44. All exterior walls and main cross partitions shall be effectively and thoroughly braced at each end, and at least every 25 feet in length. Sec. 2517-g-3. 45. Foundation cripple walls shall be framed of studs not less insize than the studding above with a minimum length of 14 inches, or shall be fr�.es of solid blocking. Sec. 2517-g-4. 46. All headers or lintels shall have not less than 2" solid bearing a, each end to the floor or bottom plats. Sec. 2517-g-5. 47. All stud partitions in the basement that are not covered on at least one side with approved wall coverings shall be braced with 2" thick bridging installed at mid -point of wall, and of the same width as the stud. Sec. 2517-g-7. 48. Rafters shall be framed directly opposite each other at the ridge. Ridge board shall be a minimum of 1" in thickness and not less in depth than the cut end of the rafter. (2" larger than rafter) Sec. 2517-h-3. 49 All lumber, plywood, etc. shall be identified by the grade mark of an apL.;roved agency. Sec. 2505. 50. In the one hour occupancy separation between a Group R and M occupancy, the separtion may be limited to the installation of materials approved for one hour fire resistive construction on the garage side and a self -closing, tight -fitting solid wood door 1 3/8" in thickness will be permitted. Sec. 503-d-4. 51. Fire stoppings shall be provided to cut off all concealed draft openings (both vertical and horizontal). Sec. 2516-f. LIFE, SAFETY, AND HEALTH 52. Every sleeping room below the fourth floor shall have at least one window or exterior door approved for emergency exit. windows with a net clear openable area of not less than 5.7 sq. ft. min. net clear opening height 24" width 20", with a max. sill height above the floor of 48" shall be deemed to meet this requirement. Sec. 1204. NOTE: The minimum dimensions do not meet 5.7 sq. ft. 53. All habitable rooms shall have natural light provided by window, with an area of not less than 8% of f loor area or min. of 8 sq. frt. Sec 1205. (1/20 of the above small be openable or a min. of 5 sq. ft.) *Exception. A mechanical ventilation system may be provided which will provide 2 air changes per hour. 1/5 shall be outside air. 54. All bathrooms, laundry rooms etc. shall have 1/20 of floor are in glass with a min. of 1 1/2 sq. ft. Sec. 1205. *Exception. A mechanical ventilation system may provided which will provide 5 air changes per hour. 55. For the purpose of determinini light and ventilation requirements, any room may be considered as portion of an adjoining room when 1/2 of the area of the common wall is open and unobstructed and provides an opening of not less than 1/10 of the floor area of the interior room or 25 sq. ft., whichever is greater. Sec. 1205-a. 56. Ceiling heights in habitable rooms, shall be not less thr- 7' 6". Other rooms may have ceiling height of not less than 7' measured to lowest projection. Sec. 1207-a. 57. Every dwelling unit shall have at least one room which shall nave not less than 150 sq. ft. of floor are. Other habitable rooms except kitchens shall have an area of not less than 70 sq. ft. Sec. 1207-b. 58. No habital room shall hava a width of less than 7 ft. except a kitchen. Sec. 1207-c. 59. A water closet compartment shall be not less than 30 inches in width and shall provide a clear space in front of the water closet not less than 24'. Sec. 511-a. 60. Every dwelling unit shall be provided with an approved smoke detector conforming to UBC Std. i43-6. They shall be mounted on the ceiling or a wall at a point centrally located in the corridor or area giving access to rooms used for sleeping purposes. All detectors shall be located within 12" of the ceiling. Sec. 1210-a. 61. Every dwelling unit shall be provided with heating facilities capable of maintaining a room temperature of 70 degrees at a point 3 ft above the floor in all habitable rooms. Sec. 1211. 62. All weather exposed surfaces, shall have a weather resistive barrier to protect the interior wall. Sec. 1707-a. 63. Exterior openings exposed to the weather shall be flashed in such a manner as to make them weatherproof. Sec. 1707-b. 64. All flashing, counter flashing, and coping when of metal shall be not less than 126 gauge corrosion resistant metal. Sec. 1707-b. 65. Shower areas shall have a smooth, hard nonabsorbent surface such as ceramic tile, to a height of not less than 6 feet. Materials other than structural elements used in such walls shall be of a type not adversely affected by moisture. Sec. 510-b. 66. Glazing used in door ad panels of shower and bathtub enclosures shall be fully tempered, laminated saftey glass, or approved plastic 3/16, min. thickness when fully tempered or 1/4' when laminated. Sec. 5406-c-d. 67. Plastics used in doors and panels of shower and bathtub enclosures shall be of a shater-resistant type. Sec. 5406-c. 68. Glazing in vocation which may be subject to human impact such as frameless glass doers, glass entrances and exit doors, fixed glass panels, sliding glass doors, shower doors, tub enclosures, and storm doors shall meet the requirements set forth in UBC Standards No. 54-2. 69. All unenclosed floor and roof openings, open and glazed sides of landings, balconies or poches which are more than 30 inches above grade, and roofs used for other than service of the building, shall be protected with a guardrail. Guardrails shall be not less than 24 inches in height. Open guardrails and stair railings shall have intermEdiate rails or an ornamental pattern such that a 6 inch diameter sphere cannot pass though. Interior guardrails may be 36" within dwelling units or guest rooms of Group R. Div. 1 occupancies. Sec. 1711. 70. The rise of every step in a stairway shall not exceed 7 1/2 inches and the run shallnot be less than 10 inches. The largest tread width or riser height within any flight of stairs shallnot exceed the smallest by more than 1/4 inch. Sec 3305-c. Stairs: Private stairways serving an occupant load of less than 10 may be constructed with an 8 inch max. rise and 9 inch min. run. Width of treads and heights of risers within any flight shall have identical dimension with a 1/4 inch tolerance. Sec. 3305-c. 71. Landings: Every landing shall have a dimension measured in the direction of travel equal to the width of the stairway. Sec. 3305-g. 72. Stairways over 3 risers shall have handrails on open sides, at least 30 inchs and not more than 34 inches above the nosing of treads. Sec. 3305-j. 73. Where there is enclosed usable space under stairs, the walls, and soffits of ther enclosed space shall be protected with materials of one hour fire resistive construction. Sec. 3305-m. 74. Exterior stairways may be of wood not less than 2" in thickness. Sec. 3305-n. 75. Every required stairway shall have a headroom clearance of not less than 6' 6". Sec. 3305-p. 76. An attic access opening shall be provided in the ceiling of the top floor of building with combustible ceiling or roof construction, it shall be readily accessible in all building. Shall have a min. opening of 22' x 30". Shall have a min. clear headroom above the access opening. Sec. 3205-a. 77. Composition shingles shall be fastened according to manufacturers printed instructions but not less than four nails for each strip shingle for 36 inch strips and two per each less than 20 inches wide. Sec. 78. Composition shingles shall have an underlay of not less than 15# felt, applied as a base sheet. Sec. 3203-d-5-a. 79. Composition shingles shall be laid on slopes that are 4/12 or greater. If less, installation approval must be granted by the Building Official. Sec. 3203-g-2. 80. Roof valley flashing shall be provided of not less than #28 galy. sheet gauge corrosion resistant metal and shall extend at least 8 inches from the center line each way, and shall have a splash diverter rib not less than 3/4" high at the flow line. Sec. 3203-d-5-b. 81. Enclosed attics and enclosed rafter spaces formed where ceilings are applied direct to the underside of roof rafters shall have cross ventilation for each separate space by ventilating openings protected against the entrance of rain and snow. The area shall be not less n 1/1.50 of the area of the space ventilated. Except that the area may be 1/300 provided at least 50% of the required ventilation area is provided by ventilators located in the %ipper portion of the space to be ventilated at least 3 feet above eave or cornice vents with the balance of the required ventilation provided by eave or cornice vents MECHANICAL SECTION 82. At least three feet clear space shall be provided in front of all zone valves and controls, etc. for access and servicing. Sec. 7209 SBC 83. Chimneys shall extend at least 3 feet above the highest point where they pass through the roof of a building and at least 2 feet higher than any portion of any building within 10 feet. Sec. 7403 SBC 84. All chimneys shall have cleanouts and the cleanouts shall be constructed so that they will remain tightly closed when not in use. Sec. 7403 SBC 85. Masonry chimneys serving gas fired boilers, furnaces or other heating devices, whether of the gas designed type or fired by gas conversion burners, having an input not exceeding 400,000 BTU per hour, shall be lined continuously from the thimble to the top of the chimney with an approved non-combustible, acid and corrosion resisting liner of the same equivalent cross sectional area as the vent connector. Sec. 7403 SBC 86. A condensation pocket shall be provided at the base of said liner with provision for a drip, so arranged that excessive condensation of combustion products may be disposed of. Sec. 7403 SBC 87. Chimney caps may be used on chimney liners providing they do not obstruct or impair the free emission of the products of combustion, are approved by the administrative authority. Sec. 7403 SBC 88. Single wall metal pipe shall be constructed of sheet steel not less than #20 gauge or other approved non-combustible corrosion resistant material. Shall be installed only for runs direct.Ly from the space in which the appliance is located through the roof or exterior wall to the outer air. Shall further meEt requirements of SBC1303, 7409 as are applicable. Sec. 7403 SBC 89. Type B gas vents, shall be round in physical shape except as approved for B-W vents. For further specifications see Sec. 7404 of SBC 90. When two or more appliances are connected to a common vent or chimney, the effective area of each vent, connector sha'- be not less than the area _f the applicant, draft hood outlet. Sec 7407-c-SBC 91. Vent connectors shall be firmly attached to draft hood outlets by sheet metal screws or other approved means. Joints of other than listed Type B gas vent materials shall be securely fastened by sheet metal screws. Sec. 7407 SBC 92. Single wall metal pipe used as a vent connector shall not pass through any floor or ceiling. Sec. 7407 SBC 93. In an individual duct system, such duct shall be provided with a volume damper with substantial mounting and positive locking device. Sec. 7508 SBC 94. In a trunk system, each branch duct shall be provided with a splitter damper where it leaves the main trunk duct, and with additional aplitter dampers it again divided. All dampers shall be provided with positive locking devices. Sec. 7508 SBC 95. Warm ai-I supply ducts shall not be installed for the purpose of heating attached pt-vate garages from any forced air system serving habitable areas. Sec.. 7508 SBC 96. Supply registers shall be securely fastened to connecting pipe. Return air registers shall have a free area at least equal to the free area of the ducts to which they are connected. Sec. 7509-7510 SBC 97. In residential installations the fan or blower housing shall not be directly connected with metal either to the furnace casing or to the return air piping. Canvas strips may be used to make these connections. Motors shall be mounted in such a way that vibration will not be transmitted to duct work or equipment. Sec. 7518 SBC 98. Residential ventilation, all ducts, (range hood ventilation) shall be galvanized iron of not less than #28 gauge. All seams in the duct system shall be tight. Pressure sensitive tape may be used (if approved). Back draft dampers shall be provided near the outlet of the duct. 1/2" mesh screen shall be installed at each exhaust outlet. Ducts passing through unheated spaces shall be insulated with a minimum of one inch of fiber glass insulation. Ducts located in a heated space shall be insulated with one inch of fiber glass insulation for a distance of three feet from the duct outlet. Sec. 7715 SBC 99. Combustion air as required by SBC 7722 shall be provided. Air intakes shall be provided from the exterior of the building. 100. Ducts shall be securely supported by metal hangers, straps, lugs or brackets. Sec. 7724-2-a SBC 101. No nails shall be driven through the duct walls and no unnecessary holes shall be cut in them. Sec. 7724-2-b 102. Where return air is taken from first floor through a register box .laced between studs, the stud space containing such box shall be effectively sealed. Sec. 7724-3 SBC 103. Separate exhaust systems shall be provided for kitchen and bathroom exhaust. Shall be exhausted to the outside atmosphere. Sec. 7729 104. All boiler and furnaces shall be provided with automatic safety devices arranged to prevent excessive water temperatures, or air temperatures by shutting off the fuel supply. Sec. 7903-5 SBC 105. All limiting devices shall shut off fuel to all main burners. Sec. 7903-5-c 106. It shall be the insallers responsibility to make provisions for adequate air for combustion and draft hood dilution. Sec. 7903-4 107. A 1 pipe used for the distribution of natural or liquid petroleum gas shall be steel, wrought iron, copper or brass of full weight standard gauge and thickness. Steel and wrought iron shall comply with ASAB 36-10. Copper tubing shall be of standard type K or L, complying with ASTM B88. Joints shall be made by approved flared gas fittings or by brazing with material having a melting point in excess of 1000 degrees. Copper tubing shall not be used for piping with the burner heat zone to pilot burners. SBC 8002 108. Gas piping in buildings shall be supported. Gas piping shall not be supported by or used to support other piping. See Sec. 8007 for further information. 109. Condensate drips are not required for gas. A tee fitting with the bottom outlet plugged or capped shall be installed at the base of supplying piping when dropping down to an automatically controlled gas burner. Sec. 8009 SBC. 110. Pipes passing through concrete, or other corrosive materials, shall pass through sleeves, castings or be suitably coated to protect against corrosion and mechanical damage. Sec. 8014 111. Gas piping shall not be run in or through an air duct, clothes chute, chimney or flue or ventilation duct. Sec. 8015 SBC 1!2. Any gas piping to be run underground outside the building shall have not less than 6 inches of ground cover. Sec. 8017 SBC 113. When meter is installed on the exterior of the building walls, a main shut-off valve, same size as the building main gas supply shall be installed on the inside of the building between the meter and the first branch gas line. Shall be installed in the first readily accessible location and have permanently attached handle. This valve shall be an approved lubricated plug or ball type. Sec. 8022 SBC 114. For each burning device there shall be provided, in the pipe supplying same, and adjacent there to, an independent shut-off valve, placed in an accessible location. All gas valves shall be of lever handle type. Sec. 8023 SBC 115. After piping has been checked for leaks, it shall be fully purged. Sec. 8031 SBC 116. The installation and maintenance of undiluted or diluted LP gas installations shall be made to the standards of NFPA #58. 117. Hot water heaters of over 38,000 BTU shall be vented with 4" vent pipes. Table #4 118. Relief valve on hot water heater shall be full size and run to within 18" of the floor. MHD 130-f-ee. 119. Maintain clearance to combustibles as required by your particular installation (see note on vent stack). 120. Vent connectors used for gas appliances shall be of not less than 26 galv. sheet gauge, except that Type B vent material may be used between the drafthiod and the chimney. SBC 7407-b Plan Check Done By: Thomas J. Jacobs, Building Official Date