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SHEET: 5 OF 7 <br />DATE: <br />DE JOB NO.: <br />DESIGN LOADS <br />Dead Loads Uplift <br />Roof 0.6WL <br />COMP SHINGLE 4.0 psf 0.6WL Zone 1 and 2e -14.9 psf, MIN 10 PSF <br />5/8" Ply shtg 1.9 Overhang -19.9 psf <br />Rf Frm'g 2.8 pWLdown = 8.3 psf 10 psf, MIN 10 PSF <br />Misc. 1.5 Uplift 0.6DL+0.6WL <br />(N) PV System 3.0 Zone 1 0.6*3 -14.9 -13.1 psf <br />Zone 2 0.6*3 -19.9 -18.1 psf <br />Total DL 13.2 psf Downward DL+0.6WL <br />LL 20.0 psf PDL+WL = 13.0 psf <br />SNOW 0.0 psf <br />Rafter Check <br />Existing 2x4 TRUSSES @ 24" o.c <br />Spacing 2.00 ft Trib panel width = 6 ft <br />E 1500000 psi Fb = 900*1.5*1.15 1552.5 psi <br />I 5.4 in^4 MallowWind = 1110 ft-lb <br />Span1 8.00 ft MallowLL = 867 ft-lb <br />Span2 8.00 ft See below for Wind Uplift loads <br />Span3 0.00 ft due to concentated loads at attachments <br />Span4 0.00 ft <br />(Distance <br />to Att. <br />Pts) a b R1 (lb) R2 (lb <br />Load <br />(psf) <br />Trib W <br />(ft) <br />Wind <br />Uplift <br />(lb) <br />Mmax <br />wind(ft- <br />lb) <br />Wind <br />Down <br />(lb) <br />P = <br />PVDL <br />(lb) <br />3.00 <br />1 3.71 3.71 4.29 130.3 112.7 14.9 6.0 243.0 483 163.1 48.9 212.0 <br />2 6.90 6.90 1.10 33.4 209.6 14.9 6.0 243.0 231 163.1 48.9 212.0 <br />3 8.75 0.75 7.25 220.2 22.8 14.9 6.0 243.0 165 163.1 48.9 212.0 <br />4 11.94 3.94 4.06 123.3 119.7 14.9 6.0 243.0 486 163.1 48.9 212.0 <br />12.86 <br />Span 1 Uniform DL 8.00 49.0 49.0 6.1 psf 2.0 12.2 plf 98 <br />Span 2 Uniform DL 8.00 49.0 49.0 6.1 psf 2.0 12.2 97.9 <br />Reactions at Span1 212.7 371.3 Negative values are uplift reactions <br />Reactions at Span2 172.3 168.6 <br />Mmaxwindup =382 ft-lb < 1110 ft-lb OK <br />Mmaxwinddown =687 ft-lb < 1110 ft-lb OK <br />For DL+LL including the PV system weight point loads w = 60.4 plf P = 48.9 lb <br />Mmax =603 ft-lb < 867 ft-lb OK <br />Deflection Check <br />DDL = 5wL4 /(384EI) (5*13.2*8^4)*1728 = 0.303 in = L/ 317.2 OK <br />384*1.5E6*5.4 <br />PROJECT: <br />CLIENT: <br />BY: <br />PV Panels for Dien Nguyen <br />Solar Max Renewable Energy Provider, I n <br />Doug Engineering <br />5/4/2023 <br />SMX-10493 <br />P = DL+WL <br />(lb) <br />2009 W Adams St <br />08/01/23