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PROJECT: Ojeda Solar Panels <br />CLIENT:TPS <br />BY:DM <br />Doug Engineering <br />Civil Engineering <br />SHT.2 OF <br />DATE <br />DE JOB NO. TPS-1196 <br />2 <br />7/23/2013 <br />CHECK SCREW ATTACHMENTS FOR WIND UPLIFT <br />P wuplift =228.1 Ib 5/16" Lag with min 2.5" penetration for each attachment <br />Table 11.2A - NDS - Lag Screw Withdrawal Values <br />For 5/16" Lag into .5G wood 266 Ib <br />Allowable wind load = 1.6*2.5*266 1064 Ib >228 Ib OK <br />Unirac Selection <br />Load for half a panel = 2.5' <br />WUNIRAC =53 pif <br />Per the Unirac Manual for 40 pif, the max span <br />for Solar Mount Unirac Rails is 6.5' <br />Use L-Foot SolarMount Rails with a spacing of 48" o.c. max for attachment points, typ. <br />Table 8. L-Foot SplarMount Series Rail Span <br />SM . SolarMount HD - SolarMount Heavy Duty <br />5 <br />53 <br />7 <br />75 <br />83 <br />9 <br />9.5 <br />to <br />103 <br />l' i <br />11.5 <br />12 <br />12.5 <br />li <br />135 <br />f4 <br />143 <br />15 <br />w = Oetrlbuted Lood (031 - <br />20 25 30 40 50 LE:.1 80;' * 100 120 140 160 180 200 ' '220 240 260 290 300 <br />SM SM SM SM SM SM SM SM SM SM SM SM SM SM <br />SM SM SM SM SM SM Stl SM SM SM SM SM SM SM <br />SM SM SM SM SM SM 91 SM SM SM SM SM SM SM <br />SM SM SM SM SM SM SM SM SM SM SM SMI <br />SM SM 2 r*il SM SM SM SM SM HD <br />SM SM SM SM SM SM Sri SM _HD <br />SM SM 91 SM SM SIt HD HD I <br />SM SM SIt SM SM HD Hb ® 1 <br />5M SM 91 SM HD HO HD I <br />SM SM 91 SM HD HO HD <br />SM SM 91 HD HD - HD <br />SM SM SM IND <br />SM SM MD. EF> <br />SM HD HD HO <br />SM HO HD ·HO <br />SM .1-ID HD HD <br />HD 'Hb AD HO <br />HD HO HD HO <br />AD AD WD 1--- <br />HD liD HI) <br />HD HO <br />HD HD <br />HD HO <br />HD <br />HD <br />HD <br />HD <br />r <br />LATERAL ANALYSIS <br />DETERMINE ADDITIONAL LOAD COMPARED TO EXISTING FOR LATERAL LOADING <br />Aroofexisting= - 11 *Wpanel =1700 sf W panel = <br />Wroofexisting = 9.7*1700 =16490 Ib <br />Wwallexisting = 15*70*4 =4200 Ib Wrestofarray - <br />44.1 Ib <br />485.1 Ib <br />91.41 Ib <br />g=20690 Ib Warray =576.51 Ib <br />Vroofexisting =3766 Ib Existing Total Lateral Force <br />\4oofwpanels =3871 Ib New Total Later Force <br />% increase =3871 <br />3766 <br />*100%-100% =2.8% <br />increase which results in less than a 10% increase in the stress of <br />existing lateral resisting elements OK