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pool POOL ENGINEERING INC.By: R. McPherson .LdiLlt engineering I1 Location: Santa Ana, CA,92705-1766 Date: 3/20/2014 <br />inc. / <br />-' Job# 14-0458 <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 />Kzt = 1 Topographic Factor (Section 26.8.2, ASCE 7-10) <br />Zone = 2 Roof 0 =22.7 deg Area =209.1 sq.ft. <br />Pnet30 =31.9 p.s.f Net Wind Design Pressure, Eqn. 6-2, ASCE 7-10 <br />Pnet = Al<z,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 />Atrib =12.8 sq.ft.(panel area tributary to each lag screw) <br />D=2.9 p.s.f.(panel dead load) <br />W=38.6 p.s.f.(design wind pressure) <br />Plag = FS*Atrib*(0·60-0.6W) = (1)(12.8 sq.ft.)[(0.6)(2.9 p.s.f.)-(0.6)(38.6p.s.f.)] <br />= 274.7lb. (withdrawal force applied to each lag screw) <br />DIA'ag=5/16 in.(lag screw diameter) <br />Dper =2.50 in.(lag screw penetration into existing framing member) <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'= CD*Ct* W =(1.6)(0.7)(266 lb./in.) = 297.92 lb./in.(adjusted withdrawal value) <br />Pallow = Dpen* W ' =(2.5 in.)(297.92 lb./in) = 744.8 lb. <br />Results:DEMAND = 274.7 lbs. < CAPACITY = 744.8 lbs. ==> OK <br />3/20/2014 3:31 PM <br />\\peanasv2\Pool\Projects Solar\2014\0458-14 Residential\14-0458 SOLAR PANEL CALCS.xlsx <br />Page 12 of 13 <br />©Pool Engineering, inc. 2014