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Loyd W. Martin Solar Structures Engineering <br />2510 W. 237th St. #206 Torrance, CA 90505 Tel:1.310.464.1804 <br />Email: loydwmartin@gmail.com www.loydwmartin.com <br />EXISTING BASE SHEAR <br />V = 0.154 x 42,000 LBS = 6,468 LBS EQ'N 12.8-1 ASCE 7-10 <br />DETERMINE NEW BASE SHEAR <br />Determine Seismic Weight of Building with Solar Array: <br />EXISTING <br />SEISMIC =42,000 LBS <br />WEIGHT <br />NEW SOLAR <br />ARRAY =3 PSF x 28 PANELS x 3.3' x 5.5' = 1,525 LBS <br />NEW <br />SEISMIC =42,000 LBS + 1,525 LBS = 43,525 LBS <br />WEIGHT <br />THEREFORE NEW BASE SHEAR: <br />- V = 0.154 x 43,525 = 6,703 LBS EQ'N 12.8-1 ASCE 7-10 <br />6,703 LBS - 6,468 LBS <br />% CHANGE = <br />6,468 LBS <br />x 100 = 3.6 % < 10% OK <br />OK. PER ASCE 7-10 SECTION 11.B.4 ALTERATIONS <br />EXISTING LATERAL FORCE RESISTING SYSTEM IS EXEMPT <br />FROM ANALYSIS SINCE NEW SEISMIC FORCE ISLESS THAN 10% GREATER THAN EXISTING SEISMIC FORCE. <br />"AIterations are permitted to be made to any structure without requiring the <br />existing structure to comply with this standard provided the alterations comply <br />with the requirements for a new structure. Alterations that increase the <br />seismic force in any existing structural element by more than 10 percent or <br />decrease the design strength of any existing structural element to resist <br />seismic forces by more than 10 percent shall not be permitted unless the <br />entire seismic force-resisting system is determined to comply with this <br />standard for a new structure." <br />1 12 No. C58724 <br />* Exp. 3-31-15 * <br />424 0/v\\. a*;5 <br />End of Calculations <br />2014- 313 Smart Energy Peou Residence <br />Sht # 6 of 6 <br />Date: March 14, 2014 <br />12 29 20*= S ela= <br />t#K O <br />H