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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 54,000 LBS = 8,316 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 =54,000 LBS <br />WEIGHT <br />NEW SOLAR <br />ARRAY =3 PSF x 16 PANELS x 3.3' x 5.5'= 871 LBS <br />t NEW <br />SEISMIC =54,000 LBS + 871 LBS = 54,871 LBS <br />WEIGHT <br />THEREFORE NEW BASE SHEAR: <br />V = 0.154 x 54,871 = 8,450 LBS EQ'N 12.8-1 ASCE 7-10 <br />8,450 LBS - 8,316 LBS <br />% CHANGE = <br />8,316 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 />"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 />76\ 1 <br /> 12 No. C58724 5811 <br />* Exp. 3-31-15 *\10 CIV\L\<t.OF c Al*/ <br />End of Calculations <br />2014- 723 Sami Amit Therian Residence <br />Sht # 6 of 6 <br />Date: May 15, 2014 <br />4,0 <br />.