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ASCE 7-16 CHAPTER 29 WIND LOADS-Rooftop Solar Panels Minimum Design Loads-Part 1:Enclosed(gable,h<60ft,7°<6<20°) <br /> Risk Category II Table 1.5-1 Load Types Load,PSf <br /> Basic Wind Speed(Ult) 140 mph Figure 26.5-16 Dead Load,D 3 <br /> Wind Speed(asd) 108 mph IBC 1609.3.1 Weight of Ice,Di 0 <br /> Roof Angle 18 Earthquake,E 0 <br /> Effective Wind Area 10.00 ft2 26.20 Fluid,F n/a <br /> Wind Load Parameters Flood Load,Fe n/a <br /> Wind Directionality Kd 0.85 Table 26.6-1 Lateral Earth psi,H n/a <br /> Exposure Cat. B,C,or D B Section 26.7 Live Load,L n/a <br /> Topographic factor K,t 1.00 26.8 or 26.8.2 Roof Live,Lr n/a <br /> Ground Elevation Factor Ke 0.86 Table 26.9-1 Rain,R n/a <br /> Velocity Exposure Coefficient K, 0.85 Table 26.10-1 Snow,S 0 <br /> Array Edge Factor 'YE 1.50 29.4.4 Self-Straining,T n/a <br /> Solar Panel Equalization Factor 7. 0.80 Fig.29.4-8 Wind,W see calc <br /> Velocity Pressure qp 18.71 psf qh=0.00256 KzKzsKdKeV2 Wind-on-Ice,Wi n/a <br /> Mean Roof Height h 20.00 ft <br /> 0.4h 8.00 ft <br /> least horizontal dim 528 in <br /> 10%of least horizontal dim 4.40 ft <br /> Roof Zone Set Back a 4.40 ft <br /> Figure 30.3-2b(Gable roof,h<60ft,7°<B<20°) <br /> Zone <br /> 1 2e 2n 2r 3e 3r <br /> GC -2.00 -2.00 -3.00 -3.00 -3.00 -3.60 uplift <br /> GCo 0.50 0.50 0.50 0.50 0.50 0.50 downward <br /> P=gh(GCv)(-ye)(-/a) -44.89 -44.89 -67.34 -67.34 -67.34 -80.81 psf uplift <br /> P=gh(GC,)(-/E)(ya) 11.22 11.22 11.22 11.22 11.22 11.22 psf downward <br /> Design Calculations for the Use of Attachment to Roof Truss/Rafter <br /> Module Length C 5.42 ft <br /> Module Width B 3.33 ft <br /> Module Area A 18.05 ft2 <br /> Total Design Load(Uplift) Pdesign -41.89 -41.89 -64.34 -64.34 -64.34 -77.81 psf <br /> Total Design Load(Downforce) Pdesign 14.22 14.22 14.22 14.22 14.22 14.22 psf <br /> Design Load per Module Tup -756.14 -756.14 -1161.28 -1161.28 -1161.28 -1404.37 1 Ibs T p=A.Pdesign <br /> Design Load per Module Tdown 256.72 256.72 256.72 256.72 256.72 256.72 Ibs Tan=A`Pdesign <br /> Distributed Load(Uplift) Pmst.Up -113.53 -113.53 -174.37 -174.37 -174.37 -210.87 plf Top/B'2 <br /> Distributed Load(Down) Pd1sz.Down 38.5S 38.55 38.55 38.55 38.55 38.55 plf Tan/B•2 <br /> Railspan Between Anchor Points L 6 6 4 4 4 2 ft <br /> Point Load per Mount(Uplift) R -681.21 -681.21 -697.47 -697.47 -697.47 -421.73 Ibs <br /> Point Load per Mount(Down) R 115.64 115.64 77.09 77.09 77.09 38.55 Ibs <br /> Table 1.1-Pullout Value for Single Lag Screw <br /> Specific Gravity G 0.55 0.55 0.55 0.55 0.55 0.55 Table 11.2A,NDS 2005,page 68(SYP) <br /> Diameter of Lag Screw D 5/16 5/16 5/16 5/16 5/16 5/16 In <br /> Pullout Value of W 306.8697 306.8697 306.8697 306.8697 306.8697 306.8697 Ibs/in W=1800 Gan D3i4 <br /> #of Lag screws 1 1 1 1 1 1 <br /> Thread Length Td 2.8 2.8 2.8 2.8 2.8 2.8 In Table L2,NDS 2005 <br /> Design Pullout Value per Mount Ws 859.2353 859.2353 859.2353 859.2353 859.2353 859.2353 Ws=W'#of Lags RTd <br /> SAFTEY FACTOR SF 1 1.26 1 1.26 1 1.23 1 1.23 1 1.23 1 2.04 1 calculatigN <br /> 1 2e 2n 2r 3e 3r \ `�. `•o V�O®/,�`� <br /> Maximum Cantileverfrom Lastattachment <br /> Max Cantilever M 24 24 16 16 16 8 in a:T'reI[sp " % <br /> .61360 1 <br /> TAT OF <br /> AO 10p.•'GA, <br /> ®HA 1I l3 Ids <br /> I <br />