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Page # 4 <br />SEISMIC CONSIDERATIONS <br />Seismic Design Criteria (per USGS) <br />Seismic Design Code ASCE 7-05 <br />Latitude _ = . 33.7484 <br />Longitude -117.9101 <br />r at Short Period Si 1.453 -USGS <br />SRA at ls Period Sl 0.513 USGS <br />Soil,Site Class D -IBC.1613.5.22 <br />Seismic Design Category SDC D USGS <br />Seismic Check Required (Ss 2 Yes IBC 1613.1 <br />0.4q & SDC 2 D)? <br />IALTERATION LATERAL DESIGN 10% EXCEPTION CHECK <br />Weight of Proposed PV System <br />Area Dead Load Weight <br />RV System.Weight 201 sf 3 psf 602 lbs <br />Total Weight of PV System W(PV)602 lbs <br />Weight of Roof on Existing B /ilding <br />Sum Area of MPs with PV 1088 sf <br />Portion of Roof Weight Area Dead Load Weight <br />Roof 1,088 sf 7.0 psf 7,619 lbs <br />Ce!!ina 1,088 sf '7.0 psf 7,619 lbs <br />Interior Wa!!see-Hall 528 sf 6.0 psf 3,167 lbs <br />Exterior Walls (Top Ha10 - ' 528 sf 18.0 psf 9,502 lbs <br />Net Weight of Roof Under PV W(exist)27,908 lbs <br />Check % Increase of Roof Weight / Seismic Shear Load <br />% Increase of DCR of Lateral 2.2%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 <br />r . <br />t <br />,