|
V = 0.3 x 177,000 LBS = 53,100 LBS
<br />DETERMINE NEW BASE SHEAR
<br />EXISTING BASE SHEAR
<br />Determine Seismic Weight of Building with Solar Array:
<br />EXISTING
<br />SEISMIC
<br />WEIGHT
<br />=177,000 LBS
<br />NEW SOLAR
<br />ARRAY =3 PSF x 97 PANELS x 3.3' x 5.5' = 5,282 LBS
<br />NEW
<br />SEISMIC
<br />WEIGHT
<br />=177,000 LBS + 5,282 LBS = 182,282 LBS
<br />THEREFORE NEW BASE SHEAR:
<br />V = 0.3 x 182,282 = 54,684 LBS
<br />% CHANGE =54,684 LBS - 53,100 LBS
<br />53,100 LBS x 100 =3 % < 10% OK
<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 forceresisting system is determined to comply with this
<br />standard for a new structure."
<br />End of Calculations
<br />Sht # 7 of 7
<br />20173570 Quick Solar Systems Kevin Costello 15049 Residence Date: September 16, 2017
<br /> 9924 Universal Boulevard #224406 Orlando, FL 32819 Tel:1.310.464.1804
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<br />Loyd W. Martin Professional Engineer, Inc.
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<br />EQ'N 12.8-1 ASCE 7-22
<br />EQ'N 12.8-1 ASCE 7-22
<br />OK. PER ASCE 7-22 SECTION 11.B.3 ALTERATIONS
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<br />Exp. 3-31-19
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