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r t <br /> Date :12/11/2020 <br /> Current Job Code:WILLIAMS,AL <br /> On ) Renewables <br /> 3of6 <br /> Engineering <br /> E' (psi)=I 1600000 <br /> Load Calculation: <br /> Dead Load Calculations: <br /> Panels Dead Load (psf) = 3.0 <br /> Roof 1 <br /> Roofing Weight(psf)= 3.0 <br /> Decking Weight(psf)= 2.0 <br /> Framing Weight(psf) = 0.6 <br /> Misc.Additional Weight(psf) = 1.0 <br /> Existing Dead Load (psf)= 6.6 <br /> Total Dead Load (psf)= 9.6 <br /> Wind Load Calculations: <br /> Ultimate Wind Speed (mph) = 145 <br /> Directionality Factor, kd = 0.85 <br /> Topographic Factor, kzt= 1.0 <br /> Roof 1 <br /> Velocity Press Exp Factor, kz= 0.93 <br /> Velocity Pressure,qz(psf) = 42.5 <br /> External Pressure Up,GCp_1= -0.85 <br /> External Pressure Up,GCp_2= -1.55 <br /> External Pressure Up,GCp_3= -2.45 <br /> External Pressure Down,GCp= 0.45 <br /> Design Pressure Up, p_1 (psf) _ -36.1 <br /> Design Pressure Up, p_2 (psf)_ -65.9 <br /> Design Pressure Up, p_3 (psf)_ -104.1 <br /> Design Pressure Down, p (psf)= 19.1 <br /> Hardware Checks: <br /> Lag Screw Checks: <br /> Roof 1 <br /> Ref.Widthrawal Value,W(lb/in)= 266 <br /> (CM=Ct=Ceg= 1.0) CD= 1.6 <br /> Adjusted Widthrawal Value,W' (lb/in)= 426 <br /> Lag Penetration, p (in.)= 2.5 <br /> Allowable Widthrawal Force,W'p(Ibs)= 1064 <br /> Applied Uplift Force (Ibs)_ -264 <br /> Uplift DCR= 0.25 <br /> 1960 Chicago Ave,Suite D15, Riverside,CA 92507 <br /> www.currentrenewableseng.com I 951.254.5655 <br /> INTEGRITY I PROFESSIONALISM I CUSTOMER EXPERIENCE <br />