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PROJECT: Ruiz Solar Panels Doug Engineering SHT.2 OF 2 <br />CLIENT:TPS Civil Engineering DATE 10/16/2013 <br />BY:DM DE JOB NO. TPS-1218 <br />CHECK SCREW ATTACHMENTS FOR WIND UPLIFT <br />Pwup'ilt =325.4 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 >325 Ib OK <br />Unirac Selection <br />Load for half a panel = 2.5' <br /> UNIRAC =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 72" o.c. max for attachment points, typ. <br />Table 8. L-Foot SolarMount Series Rail Span <br />SM - Sola-Mount HD- Solarflount Heavy Duty <br />Spen <br />IR, <br />2 <br />25 <br />3 <br />33 <br />4.5 <br />5 <br />75 <br />85 <br />9 <br />9-5 <br />I 0 <br />105 <br />115 <br />t2 <br />125 <br />135 <br />14 <br />14-5 <br />I5 <br />w = 0/trbuceollood,ptel <br />20 25 30 40 50 I 60 I 80 100 t20 /40 160 190 zoo 220 240 260 280 300 <br />SM SM SM 5M SM 91 SM SM SM SM SM SM SM SM <br />91 SM SM SM SM 91 SM SM SM SM SM SM SM „,91 <br />SM SM SM SM 91 91 SM SM SM 91 SM SM SIt.1 <br />SM 5M SM SM SM SM SM SM SM 91 SMI <br />SM 5M <br />SM SM <br />SM SM <br />SM SM <br />SM 5M <br />Stl Sri <br />SM SM <br />SM <br />HD <br />HO <br />HO <br />HD <br />HD <br />HD86866 22!i <br />1 Sri SM SM 91 SM SM SM 511 ...6Ell <br />1 91 SM SM SM 5,1 91 SM Al'/rill--- <br />SM <br />SM <br />SM <br />SM <br />SM SM SM 91 HOJ <br />Sri 511 Sri SM <br />Sril 91 SM SM HD <br />SM SM SM HD HD <br />SM Sri SM HD HD <br />SM SM SM HO HD HO A <br />SM SM MD HD 10 . <br />SM SM HD <br />SM HD HD <br />SM HO HD <br />WD RD WD <br />HD HD HD <br />HD HD HD <br />HD Ho <br />HD 10 HO 1 <br />HD HD HDlu,m Do ,- 1 <br />LATERAL ANALYSIS <br />DETERMINE ADDITIONAL LOAD COMPARED TO EXISTING FOR LATERAL LOADING <br />Aroofexisting-= 1600 sf Wpanel = <br />Wroofexisting = 9.7*1600 =15520 Ib 10 *Wpanel = <br />\Nwallexisting = 15*80*4 =4800 Ib Wrestotarray = <br />HD <br />HO8.886& <br />41 Ib <br />410 Ib <br />116.8 Ib <br />W existing =20320 Ib V"ll array =526.8 Ib <br />V = 0.182W <br />Vroofexisting =3698 Ib Existing Total Lateral Force <br />Vroofwpanels =3794 Ib New Total Later Force <br />% increase =3794 <br />3698 <br />*100%-100% =2.6% <br />increase which results in less than a 10% increase in the stress of <br />existing lateral resisting elements OK