Laserfiche WebLink
i <br /> 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 /> = 1.61 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 0= 22.4 deg <br /> sanehor= 48 in Horizontal spacing of roof anchors <br /> At b= 12.80 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= \KztPn.t30= Design Wind Uplift Pressure,ASCE 7-10,Equation 30.5-1 <br /> Zone 1 Zone 2 Zone 3 <br /> 51 psf 79 psf 144 psf <br /> Pnet= 16 psf Minimum Design Wind Pressure,ASCE 7-10,Section 30.2.2 <br /> Use 51 psf Use 79 psf Use 144 psf <br /> Connection to Existing Roof Framing <br /> F.S.= 1 Additional Factor of Safety applied to withdrawal force,if desired <br /> Atrib= 12.80 ft` <br /> DLpanel= 2.59 psf <br /> Zone 1 Zone 2 Zone 3 <br /> Wnpha= 51 psf 79 psf 144 psf <br /> Pia,=F.S.x Atrib x(0.61)-0.6W) Withdrawal force for each roof anchor <br /> Zone 1 Zone 2 Zone 3 <br /> -369.0lbs -293.6lbs -270.91bs <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 /> Panow=Dpen x W'= 657 lbs Based on penetration depth <br /> Zone 1 Zone 2 Zone 3 <br /> DEMAND= 3691bs 294 lbs 271 lbs <br /> Max Load=0.561 OK <br /> CAPACITY= 657 lbs 657 lbs 657 lbs <br /> Page 3 of 3 v, ' <br />