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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 123,000 LBS = 18,942 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 =123,000 LBS <br />WEIGHT <br />NEW SOLAR <br />ARRAY =3 PSF x 37 PANELS x 3.3' x 5.5'= 2,015 LBS <br />NEW <br />SEISMIC =123,000 LBS + 2,015 LBS = 125,015 LBS <br />WEIGHT <br />THEREFORE NEW BASE SHEAR: <br />V = 0.154 x 125,015 = 19,252 LBS EQ'N 12.8-1 ASCE 7-10 <br />19,252 LBS - 18,942 LBS <br />% CHANGE = <br />18,942 LBS <br />x 100 = 1.6 % < 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 IS <br />LESS THAN 10% GREATER THAN EXISTING SEISMIC FORCE. <br />/509#*ESS/OD2 <br /> r. M 1 10 <br />"Alterations 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 /><2 No. C58724 m <br />\*\ Exp. 3-31-15 */ <br />End of Calculations <br />2014-870 Smart Energy Tammy Doan Residence <br />Sht # 6 of 6 <br />Date: May 30, 2014