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EXISTING BASE SHEAR <br />V = 0.3 x 200,000 LBS = 60,000 LBS <br />DETERMINE NEW BASE SHEAR <br />Determine Seismic Weight of Building with Solar Array: <br />EXISTING <br />SEISMIC =200,000 LBS <br />WEIGHT <br />NEW SOLAR <br />ARRAY =3 PSF x 170 PANELS x 7.5' x 3.7' = 14,153 LBS <br />NEW <br />SEISMIC =200,000 LBS + 14,153 LBS = 214,153 LBS <br />WEIGHT <br />THEREFORE NEW BASE SHEAR: <br />V = 0.3 x 214,153 = 64,246 LBS EQ'N 12.8-1 ASCE 7-22 <br />OK. PER ASCE 7-22 SECTION 11B.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 />Sht # 7 of 7 <br />2026-0084 Carlsbad Solar 3080 S Harbor Blvd February 19, 2026 <br />      Loyd W. Martin Professional Engineer, Inc.       <br />9924 Universal Boulevard #224-406 Orlando, FL 32819 Tel:1.310.464.1804 <br />"Alterations may be made to any structure without requiring the existing structure to comply <br />with this standard, provided that the alterations comply with the requirements for a new <br />structure. Alterations that increase the seismic force in any existing structural element by <br />more than 10% or decrease the design strength of any existing structural element to resist <br />seismic forces by more than 10% shall not be permitted unless the entire seismic force- <br />resisting system is determined to comply with this standard for a new structure." <br />End of Calculations <br /> Email: loydwmartin@gmail.com www.loydwmartin.com <br />% CHANGE =64,246 LBS - 60,000 LBS x 100 = 7.1 % < 10 % OK60,000 LBS <br />Exp. 3-31-19 <br />C L <br />­2187