Laserfiche WebLink
EXISTING BASE SHEAR <br />V = 0.185 x 45,000 LBS = 8,325 LBS <br />DETERMINE NEW BASE SHEAR <br />Determine Seismic Weight of Building with Solar Array: <br />EXISTING <br />SEISMIC = 45,000 LBS <br />WEIGHT <br />NEW SOLAR <br />ARRAY = 3 PSF x 15 PANELS x 6.9' x 3.4' = 1,056 LBS <br />NEW <br />SEISMIC = 45,000 LBS + 1,056 LBS = 46,056 LBS <br />WEIGHT <br />THEREFORE NEW BASE SHEAR: <br />V = 0.185 x 46,056 = 8,521 LBS EQ'N 12.8-1 ASCE 7-22 <br />OK. PER ASCE 7-22 SECTION 11.B.3 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 />2023-2182 Tenco Solar Naser Kianfard April 1, 2023 <br /> Loyd W. Martin Professional Engineer, Inc. <br />9924 Universal Boulevard #224-406 Orlando, FL 32819 Tel:1.310.464.1804 <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 />End of Calculations <br /> Email: loydwmartin@gmail.com www.loydwmartin.com <br />% CHANGE =8,521 LBS - 8,325 LBS x 100 = 2.4 % < 10 % OK <br />8,325 LBS <br />1338 N Custer St <br />05/01/23