Laserfiche WebLink
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 /> = 1.47 Adjustment Factor for building height,ASCE 7-10,Figure 30.5-1 <br /> K,= 1 Topographic Factor,ASCE 7-10,Section 26.8.2 <br /> Roof 0= 22.0 deg <br /> Sanchor= 48 in Horizontal spacing of roof anchors <br /> Ahib= 21.60 sf Panel Area tributary to each roof anchor <br /> Pnet30 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=AKOneno= 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 /> Atrib= 21.60 ft` <br /> DLpanel= 3.00 psf <br /> Zone 1 Zone 2 Zone 3 <br /> Waplift= 46 psf 72 psf 131 psf <br /> Peas=F.S.x A,rib x(0.6D-0.6W) Withdrawal force for each roof anchor <br /> Zone 1 Zone 2 Zone 3 <br /> -560.3lbs -448.3lbs -415.4lbs <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 /> Ct= 0.7 Temperature Factor,NDS Table 10.3.4 <br /> W= 235 lb/in Withdrawal Capacity NDS Equation 12.2-1 <br /> W'=CD x Ct x W= 263 lb/in Adjusted withdrawal value <br /> Pauow=Dpen x W'= 657 lbs Based on penetration depth <br /> Zone 1 Zone 2 Zone 3 <br /> DEMAND= 560 lbs 448 lbs 4151bs <br /> Max Load=0.853 OK <br /> CAPACITY= 657 lbs 657 lbs 6571bs <br /> Page 3 of 3 1 ivi '® t- <br />