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Project Name: 5514 Rhonda Avenue, Santa Ana, California 92703 <br />Issued Date: 08/09/2024 <br />Solar Array Installation Calculations: Page | 3 <br />III.Gravity Loads <br />Roof Dead Loads Roof Dead Loads with Panels <br />Asphalt Shingles:2 psf Solar Array 3 psf <br />1/2" Plywood:1.6 psf psf <br />psf <br />psf <br />psf <br />psf <br />Total Existing Dead Load:3.6 psf Total New Dead Load:6.6 psf <br />Roof Live Loads Roof Live Loads with Panels <br />16.0 psf 0 psf <br />Snow Loads Snow Loads with Panels <br />Ground Snow Load, pg:0 psf Thermal Factor, Ct:1.0 <br />Snow Exposure Factor, Ce:1.0 Flat Roof Snow Load, pf:0.0 psf <br />Snow Importance Factor, Is:1.0 Slope Factor, Cs:1.0 <br />Thermal Factor, Ct:1.0 Sloped Roof Snow Load, ps:0.0 psf <br />Flat Roof Snow Load, pf:0 psf <br />Slope Factor, Cs:1.0 <br />Sloped Roof Snow Load, ps:0 psf <br />Gravity Load Comparison <br />Factored Load Combinations Exist. Weight (psf) New Weight (psf) <br />1.4 DL:5.0 9.2 <br />1.2 DL + 1.6 Lr:29.9 7.9 <br />1.2 DL + 1.6 S:4.3 7.9 <br /> Maximum Factored Gravity Loads:29.9 9.2 <br />% Increase in Factored Weight:-69.1% <br />Roof Live Load @ Location w/ <br />Solar Array: <br />Per Section 503.3 of the 2022 CEBC, any existing gravity load-carrying structural element for which an alteration <br />causes an increase in design dead, live, or snow load, including drift effects, of more than 5% shall be replaced or <br />altered as needed to carry the gravity loads by the CBC for new structures. <br />Since there is no increase of gravity load greater than 5%, the existing structure is adequate for the alteration. <br />Existing Design Roof Live Load <br />(reduced for sloped roof): <br />5514 W Rhonda <br />Ave11/27/2024