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1. One-hundred percent of the values in the California Building Code. Where the <br />existing seismic force-resisting system is a type that can be designated as <br />“Ordinary,” the values of R, Ωo, and Cd used for analysis in accordance with <br />Chapter 16 of the California Building Code shall be those specified for <br />structural systems classified as “Ordinary” in accordance with Table 12.2-1 of <br />ASCE 7, unless it is demonstrated that the structural system will provide <br />performance equivalent to that of a “Detailed,” “Intermediate” or “Special” <br />system. <br /> <br />2. Compliance with ASCE 41 using both BSE-1 and BSE-2 earthquake hazard <br />levels and the corresponding performance levels in Table 3405.2.4.1. <br /> <br />TABLE 3405.2.4.1 <br />PERFORMANCE CRITERIA FOR CBC LEVEL SEISMIC FORCES <br /> <br />OCCUPANCY <br />CATEGORY <br />(BASED ON CBC <br />TABLE 1604.5) <br />PERFORMANCE LEVEL <br />FOR USE WITH <br />ASCE 41 BSE-1 <br />EARTHQUAKE <br />HAZARD LE VEL <br />PERFORMANCE <br />LEVEL FOR USE WITH <br />ASCE 41 BSE-2 <br />EARTHQUAKE <br />HAZARD LEVEL <br />I Life Safety (LS) Collapse Prevention (CP) <br />II Life Safety (LS) Collapse Prevention (CP) <br />III Note a Note a <br />IV Immediate Occupancy (IO) Life Safety (LS) <br />a. Acceptance criteria for Occupancy Category III shall be taken as 80 percent <br />of the acceptance criteria specified for Occupancy Category II performance <br />levels, but need not be less than the acceptance criteria specified for <br />Occupancy Category IV performance levels. <br /> <br />3405.2.4.2 Compliance with reduced CBC level seismic forces. Where seismic <br />evaluation and design is permitted to meet reduced California Building Code seismic <br />force levels, the procedures used shall be in accordance with one of the following: <br /> <br />1. The California Building Code using 75 percent of the prescribed forces. Values of <br />R, Ωo, and Cd used for analysis shall be as specified in Section 3405.2.4.1 Item 1. <br />2. Structures or portions of structures that comply with the requirements of the <br />applicable chapter in Appendix A of the International Existing Building Code as <br />specified in Items 2.1 through 2.5 below shall be deemed to comply with this <br />section. <br />2.1. The seismic evaluation and design of unreinforced masonry bearing wall <br />buildings in Occupancy Category I or II are permitted to be based on the <br />procedures specified in Appendix Chapter A1.