ORD 1965 - Laserfiche WebLink

TABLE 2308.12.4 WALL BRACING IN SEISMIC DESIGN CATEGORIES D AND E (Minimum Length of Wall Bracing per each 25 Linear Feet of Braced Wall Line°) CONDITION SHEATHING Sos < 0.50 0.50 < Sos < 0.75< Sos < S ~ > 1.00 TYPE 0.75 1.00 One Story S-W 5 feet 4 inches 8 feet 0 inches 9 feet 4 inches 12 feet 0 inches Story Below Top S-W 10 feet 8 inches 13 feet 4 inches 17 feet 4 inches 21 feet 4 inches Story (HCD 1) Bottom story of three stories S-W COI Conventional construction not permitted (HCD -1) For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. a. Minimum length of panel bracing of one face of the wall for S-W sheathing shall be at least 4'-0" long, h/w ratio shall not exceed 2:1. For S-W panel bracing of the same material on two faces of the wall, the minimum length is permitted to be one-half the tabulated value but the h/w ratio shall not exceed 2:1 and design for uplift is required. b. (HCD 1) Applies to detached one-and two- family dwellings only. S-W =Wood structural panels shall be nailed with 15/32" thick 8d nails, at 6:6:12. 20.08.040 -Section 2308.12.4 -Braced wall line sheathing. Section 2308.12.4 Braced wall line sheathing of the California Building Standards Code 2007 Edition (24 C.C.R.), and including by reference the International Building Code, 2006 Edition Volumes 1 and 2 is amended to read as follows: 2308.12.4 Braced wall line sheathing. Braced wall lines shall be braced by one of the types of sheathing prescribed by Table 2308.12.4 as shown in Figure 2308.9.3. The sum of lengths of braced wall panels at each braced wall line shall conform to Table 2308.12.4. Braced wall panels shall be distributed along the length of the braced wall line and start at not more than 8 feet (2438mm) from each end of the braced wall line. Panel sheathing joints shall occur over studs or blocking. Sheathing shall be fastened to studs, top and bottom plates and at panel edges occurring over blocking. Wall framing to which sheathing used for bracing is applied shall be nominal 2 inch wide [1 1/i inch (38 mm)] or large members. Braced wall panel construction types shall not be mixed within a braced wall line. Braced wall panels required by Section 2308.12.4 may be eliminated when all of the following requirements are met: 1. One story detached garage Group U occupancies not more than 25 feet in depth or length. 2. The roof and three enclosing walls are solid sheathed with 1h-inch nominal thickness wood structural panels with Sd common nails placed 3/8 inches from panel edges and spaced not 41