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� Project: Linda Witas--Job#: 17-03856 <br /> � Date: 7/31/2017 Engineer: DN <br /> Wind Calculations <br /> Per ASCE 7-10 Components and Ciadding <br /> 1,'--^� Input Uariables j <br /> Wind Speed 140 mph - <br /> Exposure Category C <br /> Roof Shape Gable <br /> Roof Slope 27 degrees ' <br /> Mean Roof Height 13 ft <br /> Building Least Width 35 ft <br /> Effective Wind Area 10.9 sf <br /> Roof Zone Edge Distance,a 3.5.ft <br /> Controlling C&C Wind Zone Zone 3 <br /> � �Y Design Wind'Pressure Calculations ��� <br /> Wind Pressure P=qh*(G*Cp) <br /> - - - -- - - - - <br /> qh=0.00256*Kz*Kzt*Kd*V^2 (Eq.30.3-1) <br /> Kz(Exposure Coefficient)= 0.85 (Table 30.3-1) <br /> Kzt(topogrephic factor)= 1 (Fig.26.8-1) <br /> Kd(Wind Directionality Fador)= 0.85 (Table 26.6-1) <br /> V(Design Wind Speed)= 140 mph (Fig.26.5-1A) <br /> Risk Category= II (Table 1.5-1) <br /> qh= 36.3 psf <br /> 0.6*qh= 21.75 <br /> �'�� Standoff Uplift Calculations��� �V'� <br /> Zone 1 Zone 2 Zone 3 Positive <br /> GCp= -0.90" -1.69 -2.59 •0.50 <br /> Uplift Pressure= -19.55 psf -36.87 psf -56.42 psf 10.83 psf <br /> Attachment Dead Load= 3.00 psf 3.00 psf - 3.00 psf <br /> Max Rail Span Length= 4.00 ft 4.00 ft 4.00 ft <br /> Longitudinal Length= 2.73 ft 2.73 ft 2.73 ft <br /> Attachment Tributary Area= 10.92 sf 10.92 sf 10.92 sf <br /> Attachment Uplift= -194 Ib -383 Ib -596 Ib <br /> �� Lag Screw Uplift Capacity Check � <br /> Fastener= 5/16 inch <br /> Number of Fasteners= 1 <br /> Minimum Threaded Embedment Depth= 2.5 inch <br /> Withdraw Capacity Per Inch= 205 Ib (NDS Eq 11.2.1) <br /> Allowable Withdraw Capacity= 820 Ib (NDS Table 10.3.1) <br /> 8201b capacity>596 Ib demand Therefore,OI( <br /> �__'_'..<_�_" _'.�"__"'_""_"'_"_'_-...-,_"�'_'_'..t-_"_.'i <br /> � � T Lag Screw Shear Capacity Check , <br /> Embedment Depth Reduction Factor 1 <br /> Snow Lateral Force= 15 Ib <br /> Attachment Lateral Capacity= 288 Ib (NDS Table 11K) <br /> 287.5 Ib capacity>15 Ib demand Therefore,OEC <br />