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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 />CONC. FLAT TILE 9.0 psf 0.6WL Zone 1 and 2e -14.7 psf, MIN 10 PSF <br />5/8" Ply shtg 1.9 Overhang -19.6 psf <br />Rf Frm'g 2.8 pWLdown = 8.0 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 -14.7 -12.9 psf <br />Zone 2 0.6*3 -19.6 -17.8 psf <br />Total DL 18.2 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 7.08 ft MallowLL = 867 ft-lb <br />Span2 7.08 ft See below for Wind Uplift loads <br />Span3 8.00 ft due to concentated loads at attachments <br />Span4 4.00 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 />0.00 <br />1 0.93 0.93 6.15 236.2 35.7 14.7 6.0 272.0 220 185 55.5 240.5 <br />2 4.79 4.79 2.29 88.0 184.0 14.7 6.0 272.0 421 185 55.5 240.5 <br />5.72 <br />Span 1 Uniform DL 7.08 64.6 64.6 9.1 psf 2.0 18.2 plf 114 <br />Span 2 Uniform DL 7.08 64.6 64.6 9.1 psf 2.0 18.2 114.3 <br />Reactions at Span1 388.8 284.3 Negative values are uplift reactions <br />Reactions at Span2 64.6 64.6 <br />Mmaxwindup =299 ft-lb < 1110 ft-lb OK <br />Mmaxwinddown =610 ft-lb < 1110 ft-lb OK <br />For DL+LL including the PV system weight point loads w = 70.4 plf P = 55.5 lb <br />Mmax =531 ft-lb < 867 ft-lb OK <br />Deflection Check <br />DDL = 5wL4/(384EI) (5*18.2*7.08^4)*1728 = 0.256 in = L/ 331.9 OK <br />384*1.5E6*5.4 <br />PROJECT: <br />CLIENT: <br />BY: <br />PV Panels for Jeanne Thai <br />Solar Max Renewable Energy Provider, I n <br />Doug Engineering <br />5/23/2023 <br />SMX-10613 <br />P = DL+WL <br />(lb) <br />760 W Aster Pl - <br />2018031708/09/23