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Wind Uplift <br /> Simplified Procedure for Components and Cladding <br /> ASCE 7-10,Section 30.5 <br /> V= 145 mph Basic Wind Speed <br /> Exposure D ASCE 7-10,Section 26.7 <br /> A = 1.47 Adjustment Factor for building height,ASCE 7-10,Figure 30.5-1 <br /> Kn= 1 Topographic Factor,ASCE 7-10,Section 26.8.2 <br /> Roof 9= 27.0 deg <br /> Sanchor= 48 in Horizontal spacing of roof anchors <br /> Aaib= 12.80 sf Panel Area tributary to each roof anchor <br /> NOD Net Wind Design Pressure,ASCE 7-10,Figure 30.5-1 <br /> Roof Zone Zone 1 Zone 2 Zone 3 As shown in ASCE 7-10,Figure 30.5-1 <br /> 31.5 psf 49.1 psf 89.3 psf <br /> Pnet="'KnPneGO= Design Wind Uplift Pressure,ASCE 7-10,Equation 30.5-1 <br /> Zone 1 Zone 2 Zone 3 <br /> 46 psf 72 psf 131 psf <br /> pnet= 16 psf Minimum Design Wind Pressure,ASCE 7-10,Section 30.2.2 <br /> Use 46 psf Use 72 psf Use 131 psf <br /> Connection to Existing Roof Framing <br /> F.S.= 1 Additional Factor of Safety applied to withdrawal force,if desired <br /> DLpanel= 3.00 psf <br /> Zone 1 Zone 2 Zone 3 <br /> Wnpllft= 46 psf 72 psf 131 psf <br /> Amb= 12.8 sq.ft 6.4 sq.ft 3.2 sq.ft <br /> Piab=F.S.x A ;b x(0"6D-0"6W) Withdrawal force for each roof anchor <br /> Zone 1 Zone 2 Zone 3 <br /> -332.0lbs -265.6lbs -246.1lbs <br /> Connection Capacity <br /> db= 5/16 in Lag Screw diameter <br /> Dpen= 2.50 in Lag Screw penetration into existing framing member <br /> Southern Pine Species of wood framing <br /> CD= 1.6 Load Duration Factor for Wind Loading,NDS Table 2.3.2 <br /> C,= 0.7 Temperature Factor,NDS Table 10.3.4 <br /> W= 235 Win Withdrawal Capacity NDS Equation 12.2-1 <br /> W'=CD x C,x W= 263 lb/in Adjusted withdrawal value <br /> Pnllow.=Dpen x W,= 657 lbs Based on penetration depth <br /> Zone 1 Zone 2 Zone 3 <br /> DEMAND= 332 lbs 2661bs 246 lbs <br /> Max Load=0.505 OK <br /> CAPACITY= 657 lbs 657 lbs 657 lbs <br /> Page 3 of 3 i i n' I E <br />