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PROJECT: Trang Solar Panels Doug Engineering SHT.1 OF 2 <br />CLIENT:V.S.Civil Engineering DATE 3/31/2014 <br />BY:DM DE JOB NO. VS-6832 <br />DESIGN LOADS <br />Dead Loads <br />Roof <br />Comp. Shingle 3.5 psf Puplittzl =23.5 psf <br />5/8" Ply shtg 1.9 Pupliftz2 -38.6 psf <br />Rf Frm'g 2.8 PWLdown =13.8 psf <br />Misc.1.5 Uplift 0.6DL+0.6WL <br />(N) PV System 3.0 Zone 1 0.6*3.0-0.6*23.5 -12.3 psf <br />Zone 2 0.6*3.0-0.6*38.6 -21.36 psf <br />Total DL 12.7 psf Downward DL+0.6WL <br />LL 20 psf DL+WL -11.3 psf <br />Unlift Check <br />Existing 2x6 rafters @ 24" o.c. <br />Spacing 2.00 ft Trib panel width =6 ft <br />E 1500000 psi Fb =900*1.3*1.15 1346 psi <br />I 21 inA4 Mallowa,6Wind =1357 ft-lb <br />Spanl 11.17 ft 'VIallow26LL =1060 ft-lb <br />Span2 13.17 ft See below for Wind Uplift loads <br />Span3 3.83 ft due to concentated loads at attachments <br />(Distance Wind Mmax P =Mmax <br />to Att.Load Trib Load wind(ft· PVDL live(ft- <br />Pts) a b Rl (lb) R2 (lb (psf) W (ft) (lb) lb) (lb) lb) <br />Panel,Edge 3.00 <br />1 3.50 3.50 7.67 -82.3 -37.6 -12.3 6.0 -119.9 -288.1 29.2 61.13 <br />2 5.75 5.75 5.42 -58.2 -61.7 -12.3 6.0 -119.9 -334.4 29.2 70.96 <br />Panel Edge 6.25 <br />Panel Edge 17.08 <br />3 18.08 6.91 6.26 -111.9 -123.6 -12.3 6.0 -199.8 -773.5 48.7 188.7 <br />4 21.50 10.33 2.85 -50.9 -184.6 -12.3 6.0 -199.8 -525.3 48.7 128.1 <br />Panel Edge 22.50 <br />Span 1 Uniform DL 11.17 65.0 65.0 5.8 psf 2.0 11.6 pif <br />Span 2 Uniform DL 13.17 76.6 76.6 5.8 psf 2.0 11.6 <br />Reactions at Spanl -75.5 -34.2 Negative values are uplift reactions <br />Reactions at Span2 25.8 -108.0 <br />Mmaxwinduptift =353 ft-lb < 1357 ft-lb OK <br />For DL+LL including the PV system weight point loads W=59.4 pif P = <br />Mmax =1057 ft-lb < 1060 ft-lb OK <br />181.5 <br />252.4 <br />29.2 Ib <br />A.