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pool POOL ENGINEERING INC.By: R. Lopezld11111 engineering I- inc. ) Location: Santa Ana, CA,92706-1249 Date: 4/14/2014 <br />- Job# 14-0582 <br />WIND UPLIFT ANCHOR DESIGN: <br />Simplified Procedure for Components and Cladding: (Sec. 30.5, ASCE 7-10) <br />V= 110 mph (basic wind speed) <br />Exp. Cat.= C exposure category (Section 26.7, ASCE 7-10) <br />A = 1:21 Adjustment Factor for Building Height (Figure 30.5-1, ASCE 7-10) <br />K.=l Topographic Factor (Section 26.8.2, ASCE 7-10) <br />Zone = 2 Roof 0 =18.5 deg Area =254.6 sq.ft. <br />Pnet30 -31.9 p.s.f Net Wind Design Pressure, Eqn. 6-2, ASCE7-10 <br />Pnet = AK.Pnet30 =(1.21)(1)(31.9 p.s.f.) = 38.599 p.s.f. <br />(Pnetdesign -38.6 p.s.f. Design Wind Uplift Pressure on Components and Cladding (16 p.s.f. min. per Sec. 30.2.2, ASCE 7-10) <br />Connection to Existing Roof Framing: <br />FS= 1 (additional factor of saftey applied to withdrawal force) <br />Atr. =11.0 sq.ft.(panel area tributary to each lag screw) <br />D=2.7 p.s.f.(panel dead load) <br />W=38.6 p.s.f.(design wind pressure) <br />Plag = FS*Atrib(0·6[)-0.6W) = (1)(11 sq.ft.)[(0.6)(2.7 p.s.f.)-(0.6)(38.6p.s.f.)] <br />= 236.9lb. (withdrawal force applied to each lag screw) <br />DIAiag=5/16 in.(lag screw diameter) <br />D =2.50 in.(lag screw penetration into existing framing member)pen <br />W=266 lb./in.(lag screw reference withdrawal design value - NDS Table 11.2A, G=0.50) <br />Co =1.6 (load duration factor, 2012 NDS) <br />Q=0.7 <br />W' = Co*Q*W =(1.6)(0.7)(266 lb./in.) = 297.92 lb./in.(adjusted withdrawal value) <br />Paliow = Dpen* W' = (2.5 in.)(297.92 lb./in) = 744.8 lb. <br />Results:DEMAND = 236.9 lbs. < CAPACITY = 744.8 lbs. ==> OK <br />Page 12 of 13 <br />©Pool Engineering, Inc. 2014