Laserfiche WebLink
PROJECT: Glover Solar Panels Doug Engineering SHT.2 OF 2 <br />CLIENT:V.S.Civil Engineering DATE 3/5/2014 <br />BY:DM DE JOB NO. VS-6696 <br />CHECK SCREW ATTACHMENTS FOR WIND UPLIFT <br />P.m = 346.9 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 = 1.632.5*266 1064 Ib >347 Ib OK <br />Unirac Selection <br />Load for half a panel = 2.7' <br />UNIRAC =57.78 pif <br />Per the Unirac Manual for 60 pif, the max span <br />for Solar Mount Unirac Rails is 6.5' <br />Use L-Foot SolarMount Rails with a spacing of 72"lo.c. max for attachment points, typ. <br />Table 8. L-Foot SolarMount Series Rail Span <br />SM - SolarMount HD . Sola,Mount Heavy Duty <br />2 <br />2.5 <br />3 <br />33 <br />4 <br />43 <br />5 <br />16 1 <br />7 <br />7.5 <br />8 <br />8.5 <br />9 <br />93 <br />10 <br />10.5 <br />11 <br />11'.5 <br />ll <br />12-5 <br />w = DImiblrted lood (pUl <br />20 25 30 40 50 60 80 100 120 140 160 180 ZoO 220 240 260 290 300 <br />Sri SM SM SM SM SM SM SM SM SM SM SM SM SM SM SM SM Sri <br />SM SM SM SM SM SM SM SM 91 SM SM SM SM SM SM SM SM SM <br />SM SM SM SM SM SM SM SM SM SM SM SM SM SM SM SM J <br />SM SM SM SM SM SM SM 91 Sri SM SM SM SIt SMI <br />SM SM SM SM SM SM SM SM SM SM SM HD <br />SM SM SM SM SM SM 5M SM 91 SM HD <br />SM SM SM SM SM SM SM SM HD MD <br />SM SM SM SM SM SM SM HO HD AD <br />SM SM SM SM 91 HD 1-ID MD <br />SM 5M SM SM SM HD HD AD <br />SM SM SM SM 5M HD ·HD HD <br />SM SM SM SM SM FID HD HD <br />SM SM SM SM ,MD HD HD <br />SM SM SM HO WD MD WD <br />SM SM SM H.D MD HD HD <br />SM SM SM HD PD HD <br />SM SM HD HD HD MD <br />SM SM HD MD WD HD <br />SM MD 'HD WD MD <br />SM HD HD HO HD <br />HD -HD HD HO <br />HD RD HD HD <br />LATERAL ANALYSIS <br />DETERMINE ADDITIONAL LOAD COMPARED TO EXISTING FOR LATERAL LOADING <br />2600 sf Wpanel =Aroofexisting- <br />25 *Wpanel =iWroofexisting = 9.7*2600 =25220 Ib <br />wallexisting = 15*80*4 =5400 Ib Wrestolarray = <br />42.1 Ib <br />1052.5 Ib <br />266 Ib <br />Wexisting =30620 Ib <br />V = 0.182W <br />rciofexisting =5573 Ib Existing Total Lateral Force <br />roofwpanels =5813 Ib New Total Later Force <br />V:array =1318.5 Ib <br />% increase =5813 <br />5573 <br />*100%-100% = 4.3% <br />increase' which results in less than a 10% increase in the stress of <br />existing lateral resisting elements OK <br />r.