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Project Name: ABC-84044 <br />Structural Report (v.2.3.0) Issued Date: 08/30/2023 <br />Solar Array Installation Calculations: Page | 4 <br />IV.Seismic Loads <br />Seismic Weight <br />Existing Roof Dead Load: <br />Roof Dead Load @ Panel Locations: <br />Quantity of Pre-Existing Panels: <br />% of Roof w/ Solar Panels: <br />Equiv. Seismic Weight Increase:10.0% <br />Seismic vs. Wind Lateral Loading <br />Seismic Lateral Load <br />Wall Weight 12 psf <br />Wind Lateral Load <br />By comparison of the approximate total wind vs. seismic loads, it is apparent that wind forces are the <br />controlling design loads for the lateral load-carrying elements in the structural system. <br />Since there is no increase in the total lateral wind load in the structural system, the structure is deemed <br />adequate for the additional seismic weight. <br />Per Section 503.4 of the 2022 CEBC, any existing lateral load-carrying element whose demand-capacity ratio <br />with the alteration considered is not more than 10% greater than its demand-capacity ratio with the alteration <br />ignored shall be permitted to remain unaltered. <br />Since there is an increase of seismic weight greater than 10%, the existing lateral load-carrying elements <br />require further analysis. <br />Approximate Total Seismic <br />Lateral Load 2.513 <br />Approximate Total Wind Lateral <br />Load (short wall normal to wind)2.80 <br />To Support Every Human and Every Company on the Planet Achieve Sustainable Living <br />420 S Broadway- 101118679 & <br />20182412 <br />3/26/2024