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SHEET: 8 OF 10 <br />DATE: <br />DE JOB NO.: <br />DESIGN LOADS <br />Dead Loads Uplift <br />Roof 0.6WL <br />TPO 5.0 psf 0.6WL Zone1 and 2c -20.1 psf, MIN 10 PSF <br />5/8" Ply shtg 1.9 Overhang -25 psf <br />Rf Frm'g 2.8 pWLdown = 11.6 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 -20.1 -18.3 psf <br />Zone 2 0.6*3 -25 -23.2 psf <br />Total DL 14.2 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 2x12 RAFTERS @ 48" o.c <br />Spacing 4.00 ft Trib panel width = 4 ft <br />E 1500000 psi Fb = 900*1*1 900 psi <br />I 178.0 in^4 MallowWind = 3797 ft-lb <br />Span1 22.66 ft MallowLL = 2966 ft-lb <br />Span2 0.00 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 />6.00 <br />1 6.24 6.24 16.42 179.6 68.3 20.1 4.0 247.9 1121 123.33 37.0 160.3 <br />2 9.95 9.95 12.71 139.0 108.9 20.1 4.0 247.9 1384 123.33 37.0 160.3 <br />3 11.73 11.73 10.93 119.6 128.3 20.1 4.0 247.9 1403 123.33 37.0 160.3 <br />4 15.44 15.44 7.22 79.0 168.9 20.1 4.0 247.9 1220 123.33 37.0 160.3 <br />16.34 <br />Span 1 Uniform DL 22.66 304.6 304.6 6.7 psf 4.0 26.9 plf 1725 <br />Reactions at Span1 821.8 778.9 Negative values are uplift reactions <br />Mmaxwindup =1902 ft-lb < 3797 ft-lb OK <br />Mmaxwinddown =3722 ft-lb < 3797 ft-lb OK <br />For DL+LL including the PV system weight point loads w = 124.8 plf P = 37.0 lb <br />Mmax =2936 ft-lb < 2966 ft-lb OK <br />Deflection Check <br />DDL = 5wL4/(384EI) (5*14.2*22.66^4)*1728 = 1.262 in = L/ 215.4 OK <br />384*1.5E6*178 <br />P = DL+WL <br />(lb) <br />PROJECT: PV Panels for Kevin Trieu <br />CLIENT: ParagonSun 11/2/2022 <br />BY: Doug Engineering PGS-1254 <br />3325 S Baker St <br />01/12/23