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2.3. Seismic evaluation and design of cripple walls and sill plate anchorage in residential <br />buildings of light -frame wood construction in Occupancy Category I or H are permitted <br />to be based on the procedures specified in Appendix Chapter A3. <br />2.4. Seismic evaluation and design of soft, weak, or open -front wall conditions in multiunit <br />residential buildings of wood construction in Occupancy Category I or II are permitted to <br />be based on the procedures specified in Appendix Chapter A4. <br />2.5. Seismic evaluation and design of concrete buildings in all Occupancy Categories are <br />permitted to be based on the procedures specified in Appendix Chapter A5. <br />3. Compliance with ASCE 31 based on the applicable performance level as shown in Table <br />3405.2.4.2. It shall be permitted to use the BSE -1 earthquake hazard level as defined in <br />ASCE 41 and subject to the limitations in item 4 below. <br />4. Compliance with ASCE 41 using the BSE -1 Earthquake Hazard Level defined in ASCE 41 <br />and the performance level as shown in Table 3405.2.4.2. The design spectral response <br />acceleration parameters S XS and S,,I specified in ASCE 41 shall not be taken less than 75 <br />percent of the respective design spectral response acceleration parameters S Ds and S DI defined <br />by the California Building Code and its reference standards. <br />TABLE 3405.2.4.2 <br />PERFORMANCE CRITERIA FOR REDUCED CBC <br />LEVEL SEISMIC FORCES <br />OCCUPANCY <br />PERFORMANCE <br />PERFORMANCE <br />CATEGORY <br />LEVEL <br />LEVEL FOR USE <br />WITH ASCE 41 BSE - <br />(BASED ON CBC <br />FOR USE WITH ASCE <br />1 EARTHQUAKE <br />TABLE 1604.5) <br />31 <br />HAZARD LEVEL <br />I <br />Life Safety (LS) <br />Life Safety (LS) <br />II <br />Life Safety (LS) <br />Life Safety (LS) <br />III <br />Note a, Note b <br />Note a <br />W <br />Immediate Occupancy <br />Immediate Occupancy (IO) <br />(IO) <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 />b. For Occupancy Category III, the ASCE screening phase checklists shall be based on the life <br />safety performance level. <br />ORDINANCE NO. 2010 -013 31 <br />