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6 <br /> <br />2. Two-story buildings with a maximum plan dimension not exceeding 50 feet <br />(15240 mm) may have braced wall lines supported on continuous foundations at <br />the exterior walls only, provided: <br /> <br />a. Cripple walls do not exceed 4 feet (1219 mm) in height. <br /> <br />b. Where the first story is supported on a raised wood framed floor, the <br />interior braced wall panels are directly supported by either doubled joists, <br />continuous 4x blocking or minimum 4x floor beams. <br /> <br />Section 2308.12.4 of the California Building Code, 2013 Edition is amended as follows: <br /> <br />2308.12.4 Braced wall line sheathing. Braced wall lines shall be braced by sheathing <br />prescribed by Table 2308.12.4 as shown in Figure 2308.9.3. The sum of lengths of braced <br />wall panels at each braced wall line shall conform to Table 2308.12.4. Braced wall panels <br />shall be distributed along the length of the braced wall line and start at not more than 8 <br />feet (2438 mm) from each end of the braced wall line.. Sheathing shall be minimum of <br />3/8” thick and be fastened to studs, top and bottom plates and at panel edges occurring <br />over blocking. Wall framing to which sheathing used for bracing is applied shall be <br />nominal 2 inch wide [actual 1½ inch (38 mm)] or larger members, spaced a maximum of <br />16 inches on center. Nailing shall be minimum 8d common placed 3/8 inches from panel <br />edges and spaced not more than 6 inches on center, and 12 inches on center along <br />intermediate framing members. Cripple walls having a stud height exceeding 14 inches <br />(356 mm) shall be considered a story for the purpose of this section and shall be braced as <br />required for braced wall lines in accordance with Table 2308.12.4. Where interior braced <br />wall lines occur without a continuous foundation below, the length of parallel exterior <br />cripple wall bracing shall be one and one-half times the lengths required by Table <br />2308.12.4. Where the cripple wall sheathing type used is Type S-W and this additional <br />length of bracing cannot be provided, the capacity of Type S-W sheathing shall be <br />increased by reducing the spacing of fasteners along the perimeter of each piece of <br />sheathing to 4 inches (102 mm) o.c. <br /> <br />Table 2308.12.4 of the California Building Code 2013 Edition is amended as follows: <br /> <br />TABLE 2308.12.4 <br /> <br />WALL BRACING IN SEISMIC DESIGN CATEGORIES D AND E <br />(Minimum Length of Wall Bracing per each 25 Linear Feet of Braced Wall Linea) <br /> <br />For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. <br /> <br /> <br />CONDITION SHEATHING <br />TYPEb S DS < 0.50 0.50 ≤ S DS < 0.75 0.75 ≤ S DS ≤1.00 S DS > 1.00 <br />One Story S-W 5 feet 4 <br />inches 8 feet 0 inches 9 feet 4 inches 12 feet 0 <br />inches