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Page # 4 <br />SEISMIC CONSIDERATIONS <br />Seismic Design Criteria (per USGS) <br />Seismic Design Code ASCE 7-05 <br />Latitude - _-33.7547 <br />Longitude -117.8398 <br />SRA at Short Period Ss 1.442 USGS <br />SRA at ls Period St 0.510 USGS <br />S6il Site Class D IBC.1613.5.2_ <br />Seismic Design Category SDC D USGS <br />Seismic Check Required (Ss 2 Yes IBC 1613.1 <br />0.4€, & SDC 2 D)? <br />ALTERATION LATERAL DESIGN 10% EXCEPTION CHECK <br />Weight of Proposed PV System <br />Area Dead Load Weight <br />PV System Weight 316 sf 3 psf 949 lbs <br />Total Weight of PV System W(PV)949 lbs <br />Weight of Roof on Existing Building <br />Sum Area of MPs with PV 576 sf <br />Portion of Roof Weight Area Dead Load Weight <br />Roof 610 sf 15.0 psf 8,634 lbs <br />Ceiling 0 sf 0.0 psf 0 lbs <br />Interior Walls (Top Half)220 sf 6.0 psf 2,400 lbs <br />Extenor Walls (T66 Half)220 sf 18.0 psf 7,200 lbs - <br />Net Weight of Roof Under PV W(exist)18,234 lbs <br />Check % Increase of Roof Weight / Seismic Shear Load <br />% Increase of DCR of Lateral 5.2%W(PV)/ W(exist)Increase Seismic Shear Load < 10%, -> [OK]Force Resisting System <br />Note: Seismic base shear is directly proportional to roof weight. <br />IBC Sect. <br />3404.4