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Page # 4 <br />SEISMIC CONSIDERATIONS <br />Seismic Design Criteria (per USGS) <br />Seismic Design Code ASCE 7-10 <br />Latitude 33.7105 <br />Longitude -117.9031 <br />SIU\ at Short Period Ss 1.611 USGS <br />SRA at ls Period Sl 0.567 USGS <br />Soil.5ite Class D IBC 1613,5.2 <br />Seismic Design Category SDC D USGS <br />Seismic Check Required (Ss k Yes IBC 1613.10.40 & 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 264 sf 3 psf 793 lbs <br />Total Weight of PV System W(PV)793 lbs <br />Weight of Roof on Existing Building <br />Sum Area of MPs with PV 480 sf <br />Portion of Roof Weight Area Dead Load Weight <br />Roof 480 sf 7.0 psf 3,363 lbs <br />Ceiling .480 sf 6.0 psf 2,883 lbs <br />Interior Walls (Top Half)351 sf 6.0 psf 2,104 lbs <br />Exterior Walls (Top HaIO 351 sf 18.0 psf 6,313 lbs <br />Net Weight of Roof Under PV W(exist)14,662 lbs <br />Check % Increase of Roof Weight / Seismic Shear Load <br />% Increase of DCR of Lateral 5.4%W(PV)/ W(exist)Force Resisting System Increase Seismic Shear Load < 10%, -> [OK] <br />Note: Seismic base shear is directly proportional to roof weight. <br />IBC Sect <br />3404.4