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PROJECT: Lambaren Solar Panels Doug Engineering SHT.2 OF 2 <br />CLIENT:TPS Civil Engineering DATE 8/13/2013 <br />BY:DM DE JOB NO. TPS-1202 <br />CHECK SCREW ATTACHMENTS FOR WIND UPLIFT <br />Pwuplift -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 />LATERAL ANALYSIS <br />DETERMINE ADDITIONAL LOAD COMPARED TO EXISTING FOR LATERAL LOADING <br />Aroofexisting= = 1500 sf Wpanel = <br />Wroofexisting = 15.2* 1500 =22800 Ib 15 *\Npanel = <br />Wwallexisting = 15*80*4 =4800 Ib Wrestofarray = <br />41 Ib <br />615 Ib <br />175.2 Ib <br />Wexisting -27600 Ib W -array <br />V = 0.182W <br />Vroofexisting =5023 Ib Existing Total Lateral Force <br />Vroofwpanels -5167 Ib New Total Later Force <br />790.2 Ib <br />% increase =5167 <br />5023 <br />*100%-100% =2.9% <br />increase which results in less than a 10% increase in the stress of <br />existing lateral resisting elements OK