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JOB NO.: U3998.0066.231 <br />SUBJECT: LOAD COMPARISON <br />PROJECT: West Alton Residence <br />Summary of Loads <br />Existing With PV Array <br />D [psf]1 5 1 8 <br />Lr [psf]20 0 <br />S [psf]0 0 <br />Maximum Gravity Loads: <br />Existing With PV Array <br />(D + Lr) / Cd [psf] 28 20 ASCE 7-16, Section 2.4.1 <br />(D + S) / Cd [psf] 17 20 ASCE 7-16, Section 2.4.1 <br />Maximum Gravity Load [psf]: 28 20 <br />Ratio Proposed Loading to Current Loading:72% OK <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%. Therefore, the <br />requirements of Section 503.3 of the 2022 CEBC are met and the structure is permitted <br />to remain unaltered. <br />(Cd = Load Duration Factor = 0.9 for D, 1.15 for S, and 1.25 for Lr) <br />941 W Alton Ave - <br />201 7966906/27/23