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Check Existing 2X10 Roof Rafters @ 36" O.C.: <br />Snow Load =0 psf <br />Dead Load =14 psf <br />Live Load =16 psf <br />WDL + LL =30 psf x 3 ft. = 90 plf <br />WDL =14 psf x 3 ft. = 42 plf <br />w =30 psf x 3 ft. = 90 plf <br />Total load on rafters =( 90 plf x 0.8 ft ) + ( 42 plf x 4.2 ft ) + ( 6' x 3.7' x 3 psf x 1 ) <br />=315 lbs < 450 lbs OK <br />OK. Per 2022 California Existing Building Code Section 503.3 Alterations <br />Check attachment of Support to Existing Structure for Wind Uplift <br />CHECK SOLAR STRUCTURE ATTACHMENTS PER ASCE 7-16 WIND LOADS ON BUILDING <br />APPURTENANCES AND OTHER STRUCTURES Section 29.4.4 THEREFORE CHECK <br />ATTACHMENT FOR TYPICAL CRITICAL LOAD WHICH IS THE EDGE ZONE - ZONE 2. <br />NOTE: PER DEFINITION ON SHEETS 246 & 247 OF ASCE 7-16 EFFECTIVE WIND AREA: <br />FOR ROOFTOP SOLAR ARRAYS, THE EFFECTIVE WIND AREA IN FIG. 29.4-7 IS <br />EQUAL TO THE TRIBUTARY AREA FOR THE STRUCTURAL ELEMENT BEING <br />CONSIDERED, EXCEPT THAT THE WIDTH OF THE EFFECTIVE WIND AREA NEED NOT <br />BE LESS THAN ONE-THIRD ITS LENGTH. <br />EFFECTIVE AREA = 15 SQ FT <br />Sht # 3 of 7 <br />2023-4620 Effect Energy George Hansen August 24, 2023 <br />      Loyd W. Martin Professional Engineer, Inc.       <br />9924 Universal Boulevard #224-406 Orlando, FL 32819 Tel:1.310.464.1804 <br /> Email: loydwmartin@gmail.com www.loydwmartin.com <br />% CHANGE =315 lbs - 450 lbs x 100 =-30% < 5% OK450 lbs <br /> <br /> <br /> <br /> <br /> <br />106 E 4th St - 101116506 <br />& 2018087910/10/2023