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HomeMy WebLinkAbout08072003 BSC Agenda Item 9 AOL Email Page 1 of 2 S Annette Arriaga From: Annette Arriaga Sent: Thursday, July 03, 2003 2:30 PM To: Bryant Slimp - BSC (E-mail); David Kehn - BSC (E-mail); Muddy McDaniel - BSC (E-mail); Patrick O'Donnell - BSC (E-mail) Subject: FW: Rot Resistant Materials Applications Original Message From: Lalbins @aol.com [mailto:Lalbins @ aol.com] Sent: Wednesday, July 02, 2003 9:16 AM To: djfriday @pdq.net; mcdaniel @swbell.netl; jorge @jimenezcompany.com; AArriaga @westu.org Subject: Rot Resistant Materials Applications For Discussion: Rot & Corrosion resistant materials should be considered for the following applications on all new construction and on major remodeling: Exterior Door Jambs Brick Moldings Door Sills Window Sills Facias Frieze Soffits & Ceilings (except where decorative components are not available in rot resistant materials) Siding (except to match existing) Trim Boards All Exterior Deck/Balcony/Porch Components (structural & decorative) Sheathing within 4ft of grade or a deck/balcony/porch Floor Decking on any exterior deck/balcony/porch Floor Decking in interior "wet" areas (bathrooms, utility rooms, kitchens, etc.) Exterior Stairs Exterior Handrails Structural Fence Components Bottom 11" of wood fences Masonry Lintels Other areas for possible application: Exterior Doors Exterior Windows Possible Suitable Materials: Pressure Treated Pine 7/3/2003 IAOL Email Page 2 of 2 • • Mahogany Cypress Aluminum Galvanized Steel Stainless Steel Copper Resin Based Composites Fiberglass UV resistant Plastic Nardi (or equal) products Any other material with equal or better rot/corrosion resistance All4,4/4, 7/3/2003 Table 2308.1A Maximuetud Spacing Lateral Supporting roof and Supporting 1 floor, Supporting 2 floors, Stud Unsupported ceiling only roof and ceiling roof and ceiling Size Stud Height(ft) (in) (in) (in) 2x4 10 24 16 — 3x4 10 24 24 16 2x5 10 24 24 — 2x6 10 24 24 16 1 in=25.4 mm 1ft=0.305m 2308.1.2 Utility grade studs shall not be spaced more than 16 inches (406 mm) on center, support more than a roof and ceiling and exceed 8 ft (2438 mm) in height for exterior load bearing walls. 2308.1.3 Heights listed in 2308.1.1 are distances between points of horizontal lateral support placed perpendicular to the plane of the wall. Heights may be increased where justified by analysis. 2308.1.4 Where floor trusses, floor joists or roof trusses are spaced more than 16 inches (406 mm) on center and the bearing studs are spaced 24 inches (610 mm) on center, such joists or trusses shall bear within 5 inches(127 mm)of the studs beneath. EXCEPTIONS: 1.The top plates are two 2x6 or two 3x4 members. 2.A third top plate is installed. 3. Solid blocking equal in size to the studs is installed to reinforce the double top plate. Table 2308.1 B Allowable Spans for Wood Structural Panel Wall Sheathing1,2 Maximum Stud Spacing(in)with Panel thickness Exterior covering nailed to: Ls (in)and • Panel Span Rating Construction Stud Sheathing • 12/0,16/0,20/0 5/16 16 163 or Wall-1 6oc • 24/0,24/16,32/16 3/8,7/16,15/32, 24 244 or Wall-24oc 1/2 1 in=25.4 mm (continued) 568 Standard Building Code©1994 • Notes(continued): • 1.Spans shall be limited to val•hown because of possible effect of concentrated loads. Allowable uniform loa sed on deflection of 1/360 of span shall be 100 psf, except panels with a Span Rating of 48 o.c.shall be limited to 65 psf total load at maximum span. Wood structural panel edges shall have approved tongue-and- groove joints or shall be supported with blocking, unless 1/4 inch minimum thickness underlayment is installed, 1 1/2-inch approved cellular or lightweight concrete is installed, or finish floor is 3/4-inch wood strip. If wood strips are perpendicular to supports, thicknesses shown for 16-inch and 20-inch spans shall have a maximum span of 24-inches. 2.Applicable to all grades of sanded exterior-type plywood. 3.Applicable to underlayment grade and C-C (plugged) plywood, and Single Floor grade panels. 2307.7 Plank-And-Beam Framing 2307.7.1 Beams supporting plank floors shall not exceed the limitations set forth in 2307.2. 2307.7.2 The allowable span for 2-inch planks shall be determined in accordance with 2301.2 or 2301.3.1. 2307.8 Floor Framing To Masonry Walls Wood floor construction which rests on masonry walls shall be anchored thereto in accordance with 2110.3. 2307.9 Stair Framing 2307.9.1 Stair framing shall be supported adequately on floor framing or on walls or partitions. 2307.9.2 Except in public stairs where the number and size of stringers shall be determined by engineering analysis, two rough stringers shall be provided for each set of stairs, cut to receive finish treads and risers of uniform width and height. 2307.9.3 Unless stringers are supported on walls or partitions, the minimum effective depth at each notch shall be not less than 3 1/2 inches (88.9 mm). 2308 VERTICAL FRAMING 2308.1 Exterior Wall Framing 2308.1.1 Studs in one and two story buildings shall be not less than 2x4 with the wide face perpendicular to wall. In three story buildings, studs in the first story shall be not less than 3x4 or 2x6. Studs shall be spaced in accordance with Table 2308.1A. Standard Building Code©1994 567