Laserfiche WebLink
' Project: William Wulfert -- Job#: 20-02920 <br /> i Date: 3/27/2020 Engineer: TH <br /> Wind Calculations <br /> Per ASCE 7-10 Components and Cladding <br /> ! ,InputVariables- <br /> Wind Speed 145 mph <br /> i Exposure Category _ B <br /> Roof Shape Gable <br /> -- - ---- -e'- - ----._---- <br /> _. Roof Slope Y __19 degrees <br /> Mean Roof Height 11 ft <br /> Building Least Width 25'ft <br /> Effective Wind Area 13.0 sf <br /> Roof Zone,Edge Distance,a 3.0 ft. <br /> Controlling C&C Wind Zone- Zone 3 <br /> =Design,Wind,Pressure Calculations <br /> Wind Pressure P=_qh*(G*Cp) _ <br /> gh`0.00256-** Kz*Kzt*Kd*V^2 _ Eq.-29.3_1 <br /> Kz(Exposure Coefficient)= 0.7 (Table 30.3-1) <br /> _ - Kzt(topographic factor)_.1. _ (Fig.26.8-1); <br /> Kd(Wind Directionality Factor)= 0.85 (Table 26.6-1) <br /> V(Design Wind Speed)= 145 mph (Fig.26.5-1A) <br /> Risk Cate o III _ Table 1.5 1 <br /> qh= 32.0 psf <br /> r - - --- - - 0.6*qh= 19.22- <br /> Standoff Uplift Calculations I <br /> Zone 1 Zone 2 Zone 3 Positive <br /> - --_GCp -0.90 _ - --1.68 .-2.58_ 0.49 <br /> Uplift Pressure= -17.23 psf -32.35 psf -49.58 psf 16.00 psf <br /> Attachment Dead Load= 3.00 psf_ 3.00 psf_ 3.00 psf <br /> _ Max Rail Span Length p_ 4.00 _ -Y 4:00 v4u00 <br /> _ Longitudinal Length= 3.25 __ 3._25 3.25 <br /> {Attachment Tributary Area= 13.00 - 1-3.00 13.00 <br /> ( _ Attachment.Uplift= .-201.00 _"�397.00 v621.00, <br /> Lag Screw.0 plift.Capacity,Check•- <br /> _ Fastener= 5/16 inch <br /> Number of Fasteners= 1- <br /> _Minimum <br /> _Threaded Embedment Depth= 2._5 inch <br /> Withdraw Capacity Per Inch=T205 lb _ __.-_(NDS Eq 12.2-1) <br /> _Allowable Withdraw Capacity=_820 lb_ _ (NDS Eq 1_1.3-1) <br /> (� 820 Ib capacity>621lb demand Therefore,OK <br /> r - -- -- „--- Lag Screw,Shear Capacity Check <br /> Embedment Depth Reduction Factor <br /> ---Embedment <br /> Lateral Force from Gravity Loads=_13 Ib� A._ <br /> _ _Attachment Lateral Capacity= 2501b (NDSTable 12K) <br /> _ ^r.250 lb capacity>13 Ib demand Therefore,OK <br /> 3 of 6 <br />