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3405.2.4.1 Compliance with CBC level seismic forces. Where compliance with the seismic design <br /> provisions of the California Building Code is required, the procedures shall be in accordance with <br /> one of the following: <br /> 1. One - hundred percent of the values in the California Building Code. Where the existing seismic <br /> force - resisting system is a type that can be designated as "Ordinary," the values of R, 0 and <br /> Cd used for analysis in accordance with Chapter 16 of the California Building Code shall be <br /> those specified for structural systems classified as "Ordinary" in accordance with Table 12.2-1 <br /> of ASCE 7, unless it is demonstrated that the structural system will provide performance <br /> equivalent to that of a "Detailed," "Intermediate" or "Special" system. <br /> 2. Compliance with ASCE 41 using both BSE -I and BSE -2 earthquake hazard levels and the <br /> corresponding performance levels in Table 3405.2.4.1. <br /> TABLE 3405.2.4.1 <br /> PERFORMANCE CRITERIA FOR CBC LEVEL SEISMIC FORCES <br /> OCCUPANCY PERFORMANCE LEVEL PERFORMANCE <br /> CATEGORY FOR USE WITH LEVEL FOR USE WITH <br /> (BASED ON CBC TABLE ASCE 41 BSE -1 ASCE 41 BSE -2 <br /> 1604.5) EARTHQUAKE EARTHQUAKE <br /> HAZARD LEVEL HAZARD LEVEL <br /> 1 Life Safety (LS) Collapse Prevention (CP) <br /> II Life Safety (LS) Collapse Prevention (CP) <br /> III Note a Note a <br /> IV Immediate Occupancy (10) Life Safety (LS) <br /> a. Acceptance criteria for Occupancy Category III shall be taken as 80 percent of the acceptance <br /> criteria specified for Occupancy Category II performance levels, but need not be less than the <br /> acceptance criteria specified for Occupancy Category IV performance levels. <br /> 3405.2.4.2 Compliance with reduced CBC level seismic forces. Where seismic evaluation and design is <br /> permitted to meet reduced California Building Code seismic force levels, the procedures used shall be <br /> in accordance with one of the following: <br /> 1. The California Building Code using 75 percent of the prescribed forces. Values of 14, O , <br /> and Cd used for analysis shall be as specified in Section 3405.2.4.1 Item I. <br /> 2. Structures or portions of stnictures that comply with the requirements of the applicable <br /> chapter in Appendix A of the International Existing Building Code as specified in Items 2.1 <br /> through 2.5 below shall be deemed to comply with this section. <br /> 29 <br />