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SHEET: 6 OF 6 <br />DATE: <br />DE JOB NO.: <br />CHECK SCREW ATTACHMENTS FOR WIND UPLIFT <br />Pwuplift = 192.2 lb 5/16" Lag with min 2.5" penetration for each attachment <br />Table 12.2A - NDS - Lag Screw Withdrawal Values <br />For 5/16" Lag into .5G wood 266 lb <br />Allowable wind load = 1.6*2.5*266 1064 lb > 192.2 lb OK <br />CHECK SCREW ATTACHMENTS FOR SHEAR DUE TO SEISMIC Fp <br />Fp = 34.82 lb <br />Roof slope/module tilt 22 deg <br />Shear = Fp*cos(22 ) = 32.3 lb Fp sin(ang) <br />Tension = Fp*sin(22 ) = 13.0 lb <br />Fp cos(ang) <br />Table 11K - NDS Z =190 lb <br />C D =1.6 ` <br />Z' = Z*CD =304 lb > 32.28 lb OK Withdrawal capacity W' = 1064 lb <br />Interaction Equation ft/Ft+fv/Fv 0.193 +0.106 = 0.299 < 1 OK <br />LATERAL ANALYSIS <br />DETERMINE ADDITIONAL LOAD COMPARED TO EXISTING FOR LATERAL LOADING <br />Aroofexisting= = 1212 sf Wpanel = 51.8 lb <br />Wroofexisting = 10.2*1212 = 12362 lb 11 *Wpanel = 569.8 lb <br />Wwallexisting = 15*80*4 = 4800 lb Wrestofarray = 133.1 lb <br />Wexisting = 17162 lb Warray = 702.9 lb <br />V = 0.18 W <br />Vroofexisting = 3089 lb Existing Total Lateral Force <br />Vroofwpanels = 3216 lb New Total Later Force <br />% increase = 3216 increase which results in less than a 10% increase in the <br />3089 stress of existing lateral resisting elements OK <br />PROJECT: <br />CLIENT: <br />BY: <br />PV Panels for April Howard <br />SunLux <br />Doug Engineering <br />*100%-100% = 4% <br />8/22/2022 <br />SLE-4569 <br />2628 W Northwood <br />Ave10/12/22