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2. Forces corresponding to_BSE -1 and BSE -2 Earthquake Flanrd Levels defined in ASCE <br /> 41. Where ASCE 41 is used, the corresponding performance levels shall be those shown <br /> in Table 3403.6.1.1.2. <br /> TABLE 3403.6.1.1.2 <br /> ASCE 41 and ASCE 31 PERFORMANCE LEVELS <br /> PERFORMANCE LEVEL PERFORMANCE LEVEL <br /> OCCUPANCY FOR USE WITH ASCE 31 FOR <br /> CATEGORY AND WITH ASCE 41 USE WITH ASCE 41 BSE -2 <br /> (BASED ON IBC BSE -1 EARTHQUAKE EARTHQUAKE HAZARD <br /> TABLE 1604.5) HAZARD LEVEL LEVEL <br /> 1 Life Safety (LS) Collapse Prevention (CP) <br /> 11 Life Safety (LS) Collapse Prevention (CP) <br /> 111 Note (a) Note (a) <br /> IV Immediate Occupancy (10) Life Safety (LS) <br /> a. Performance Levels for Occupancy Category 111 shall be taken as halfway between the <br /> performance levels specified for Occupancy Category 1I and Occupancy Category IV. <br /> 3403.6.1.1.3 Reduced CBC level seismic forces. When seismic forces are permitted to meet <br /> reduced building code levels, they shall be one of the following: <br /> 1. 75 percent of the forces prescribed in the building code. The R factor used for analysis in <br /> accordance with Chapter 16 of the building code shall be the R factor as specified in <br /> Section 3403.6.1.1.2. <br /> 2. In accordance with the applicable chapters in Appendix A of the International Existing <br /> Building Code as specified in Items 2.1 through 2.5 below. Structures or portions of <br /> structures that comply with the requirements of the applicable chapter in Appendix A <br /> shall be deemed to comply with the requirements for reduced building code force levels. <br /> 2.1. The seismic evaluation and design of unreinforced masonry bearing wall buildings <br /> in Occupancy Category I or 1I are permitted to be based on the procedures specified <br /> in Appendix Chapter A 1. <br /> 2.2. Seismic evaluation and design of the wall anchorage system in reinforced concrete <br /> and reinforced masonry wall buildings with flexible diaphragms in Occupancy <br /> Category I or 11 are permitted to be based on the procedures specified in Appendix <br /> Chapter A2. <br /> 2.3. Seismic evaluation and design of cripple walls and sill plate anchorage in <br /> residential buildings of light -frame wood construction in Occupancy Category I or 11 <br /> are permitted to be based on the procedures specified in Appendix Chapter A3. <br /> 8 <br />