Laserfiche WebLink
EXISTING BASE SHEAR <br />V = 0.185 x 42,000 LBS = 7,770 LBS <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 18 PANELS x 5.5' x 3.3' = 981 LBS <br />NEW <br />SEISMIC = 42,000 LBS + 981 LBS = 42,981 LBS <br />WEIGHT <br />THEREFORE NEW BASE SHEAR: <br />V = 0.185 x 42,981 = 7,952 LBS EQ'N 12.8-1 ASCE 7-16 <br />OK. PER ASCE 7-16 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 />2023-4335 Precis Solar Rebecca Bennett July 29, 2023 <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 <br />comply with this standard, provided that the alterations comply with the requirements for a <br />new structure. Alterations that increase the seismic force in any existing structural element <br />by more than 10% or decrease the design strength of any existing structural element to <br />resist seismic forces by more than 10% shall not be permitted unless the entire seismic <br />force-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 =7,952 LBS - 7,770 LBS x 100 = 2.3 % < 10 % OK <br />7,770 LBS <br />1522 N Eastside <br />Ave09/12/23