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2007 SUPPLEMENT TO THE IRC TABLE R602.10.4.6 HEADER TO JACK STUD STRAP AND THE NUMBER OF ADDITIONAL JACK STUDS REQUIRED FOR RESISTING WIND PRESSURES PERPENDICULAR TO 6:1 ASPECT RATIO WALLS LOCATED IN WIND EXPOSURE CATEGORIES C AND D Wind Exposure CatesoC Wind Exonsure Cate Required Wall Height (ft) Strap Capacity(Ob)a Number of additional 2x4 Jack Studs 10 and less less than 110 2275 a. If 2x6 framing is used, then the required strap capacity may be multiplied by 0.65, but in no case shall the required strap capacity be less than 1,000 Ib. b. If 2x6 framing is used, then no additional framing shall be required. R602.10.5 Braced wall panel support Braced wall panels shall be supported on floor framing or foundations as follows: 1, Where joists are perpendicular to braced wall lines above or below, blocking shall be provided between the joists at braced wall panel locations to permit fastening of wall plates in accordance with Table R602.3(1). 2, Where joists are parallel to braced wall lines above or below, a rim joist or other parallel framing member shall be provided at the wall to permit fastening of wall plates in accordance with Table R602.3(1) 3. Braced wall panels shall be permitted to be supported on cantilevered floor joists meeting the cantilever limits of Section R502.3.3 provided joists are blocked at the nearest bearing wall location, except such blocking shall not be required in Seismic Design Categories A, B, and C for cantilevers not exceeding 24 inches (610 mm) where a full height rim joist is provided„ 4, Elevated post or pier foundations supporting braced wall panels shall be designed in accordance with accepted engineering practice, R602.10.5.1 Interior braced wall panel connections for Seismic Design Categories Do, D1 and D2. Interior braced wall lines shall be fastened to floor and roof framing in accordance with Table R602.3(1), to required foundations in accordance with Section R602.11,1, and in accordance with the following requirements: 1, Floor joists parallel to the top plate shall be toe -nailed to the top plate with at least 8d nails spaced a maximum of 6 inches (150 mm) on center, 2. Top plate laps shall be face -nailed with at least eight 16d nails on each side of the splice. R602.10.6 Interior braced wall support. In Seismic Design Categories A through D,, interior braced wall lines shall be supported as provided in Section R502.4, R602.10.6.1 Interior braced wall support for Seismic Design Category D2. In one-story buildings located in Seismic Design Category 02, interior braced wall lines shall be supported on continuous foundations at intervals not exceeding 50 feet (15 240 mm), In two story buildings located in Seismic Design Category D2, all interior braced wall panels shall be supported on continuous foundations,. Exception: Two-story buildings shall be permitted to have interior braced wall lines supported on continuous foundations at intervals not exceeding 50 feet (15 240 mm) provided that: 1, The height of cripple walls does not exceed 4 feet (1219 mm). 2. First -floor braced wall panels are supported on doubled floor joists, continuous blocking or floor beams. 3.. The distance between bracing lines does not exceed twice the building width measured parallel to the braced wall line. R602.10.7 Panel joints. All vertical joints of panel sheathing shall occur over, and be fastened to common studs. Horizontal joints in braced wall panels shall occur over, and be fastened to common blocking of a minimum 1-1/2 inch (38 mm) thickness. IRC -53 CopyngMed O 2007 ICC (ALL R=GHTS RESERVED); licensed to Neil Enckson pursuant to License Agreement with ICC No further =. - s.ocraons authOnzed or distribution authorized_ ANY UNAUTHROIZED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER,