Laserfiche WebLink
<br />2. Two-story buildings with a maximum plan dimension not exceeding 50 feet (15240 <br />mm) may have braced wall lines supported on continuous foundations at the exterior <br />walls only, provided: <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 interior <br />braced wall panels are directly supported by either doubled joists, continuous 4x blocking or minimum 4x floor beams. <br /> <br /> <br />Section 7-5-195: REPAIRS. Title 24, California Existing Building Code, Part 10, Section 404 <br />is amended as follows <br />Sections 404.2.4 through 404.2.4.2 and Tables 404.2.4.1 and 404.2.4.2 are added as follows: <br /> <br />404.2.4 Seismic Evaluation and Design Procedures for Repairs. The seismic evaluation and <br />design shall be based on the procedures specified in the California Building Code, ASCE 31 Seismic Evaluation of Existing Buildings (for evaluation only) or ASCE 41 Seismic Rehabilitation of Existing <br />Buildings. The procedures contained in Appendix A of the International Existing Building Code <br />shall be permitted to be used as specified in Section 3405.5.1.1.3. <br /> 404.2.4.1 Compliance with CBC level seismic forces. Where compliance with the seismic design provisions of the California Building Code is required, the procedures shall be in accordance with <br />one of the following: <br /> <br />1. One-hundred percent of the values in the California Building Code. Where the existing <br />seismic force-resisting system is a type that can be designated as “Ordinary,” the values of R, Ωo, and Cd used for analysis in accordance with Chapter 16 of the California <br />Building Code shall be those specified for structural systems classified as “Ordinary” in <br />accordance with Table 12.2-1 of ASCE 7, unless it is demonstrated that the structural <br />system will provide performance equivalent to that of a “Detailed,” “Intermediate” or <br />“Special” system. <br />2. Compliance with ASCE 41 using both BSE-1 and BSE-2 earthquake hazard levels and the <br />corresponding performance levels in Table 404.2.4.1. <br /> <br />TABLE 404.2.4.1 PERFORMANCE CRITERIA FOR CBC LEVEL SEISMIC FORCES <br />OCCUPANCY <br />CATEGORY <br />(BASED ON CBC TABLE 1604.5) <br />PERFORMANCE LEVEL <br />FOR USE WITH <br />ASCE 41 BSE-1 <br />EARTHQUAKE HAZARD LEVEL <br />PERFORMANCE <br />LEVEL FOR USE WITH <br />ASCE 41 BSE-2 <br />EARTHQUAKE HAZARD LEVEL