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JOB NO.:U3594.0103.251 <br />SUBJECT:LOAD COMPARISON <br />® <br />Roof 2 <br />PROJECT:Suzanne Stauduhar Residence <br />Summary of Loads <br />Existing With PV Array <br />D [psf]16 19 <br />Lr [psf]20 0 <br />S [psf]35 35 <br />Maximum Gravity Loads: <br />Existing With PV Array <br />(D + Lr) / Cd [psf]28 21 ASCE 7-16, Section 2.4.1 <br />(D + S) / Cd [psf]44 47 ASCE 7-16, Section 2.4.1 <br />Maximum Gravity Load [psf]:44 47 <br />Maximum Member Forces: <br />GEOMETRY <br />Span(ft)27.0 (Approximate) <br />Solar Panel Array Start, a (ft)6.0 (Approximate) <br />Solar Panel Array Length, b (ft)5.5 (Approximate) <br />Framing Spacing (ft)2.0 <br />MEMBER FORCES <br />Existing With PV Array <br />Vertical Reaction, V1 (lbs)1180 1201 OK <br />Vertical Reaction, V2 (lbs)1180 1190 OK <br />Existing With PV Array <br />Moment @ Center, M (lbs-ft)7962 8102 OK <br />Ratio <br />The gravity loads, and thus the stresses of the structural elements, in the area of the <br />solar array are either decreased or increased by no more than 5%. Stress decreases or <br />increases of no more than 5% are considered acceptable. Therefore, the structure is <br />permitted to remain unaltered. <br />(Cd = Load Duration Factor = 0.9 for D, 1.15 for S, and 1.25 for Lr) <br />Ratio <br />102% <br />102% <br />101%