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Page # 5 <br />CALCULATION OF DESIGN WIND LOADS <br />Wind Design Criteria <br />Wind Design Code ASCE 7-05 <br />Wind Design Method _Partially/Fully Enclosed Method <br />Basic Wind Speed V 85 mph F#.6-1 <br />Exposure Category C Section 6.5.6.3 <br />Roof Style Gable Roof Fig. 6-118/C/D-14NB <br />Mean Roof Height h 15 ft Section 6.2 <br />Effective Roof Slope 18° <br />Effective Rafter Spacing 24" O.C. <br />Effective Wind Area (1 Module) A 17.6 sf IBC 1509.7.1 <br />Wind Pressure Calculation Coefficients <br />Wind Pressure Exposure Kz <br />Topographic Factor Krt <br />Wind Directionality Factor Kd <br />Importance Factor I <br />Velocity Pressure qb <br />0.85 <br />1.00 <br />0.85 <br />1.0 <br />qh = 0.00256 (Kz) (Kzt) (Kd) (VA2) (I) <br />13.3 psf <br />Table 6-3 <br />Section 6.5.7 <br />Table 6-4 <br />Table 6-1 <br />Equation 6-15 <br />Wind Pressure <br />Ext. Pressure Coefficient (Up)-0.88 Fig. 6-118/C/D-14NBGCp cup) <br />Ext. Pressure Coefficient (Down)GCp (Down)0.45 Fig. 6-118/C/D-14NB <br />Design Wind Pressure p P=qh (Gep)Equation 6-22 <br />Wind Pressure Up P(UP)-11.7 psf <br />Wind Pressure Down P(down)10.0 psf <br />ALLOWABLE STANDOFF SPACINGS <br />X-Direction Y-Diredion <br />Max Allowable Standoff Spacing Portrait 72"32" <br />Max-Aflbov#ble Cantilgyer_ ___-_ . _ _ _po,ait _ _ _ _ - ____ - _24,1 - _ -- _--1 NA --_ <br />Standoff Configuration Portrait 16Estaggered <br />Max Standoff Trikulary Area__ - _ _ Trib -16 M -- _ <br />PV Assembly Dead Load W-PV 3 psf <br />Ki*_Wind Up#ftat_standoff.LIT --f_- I--TNctu#IJ i-- 7-2 - - _- 2-172_[bs_ _ -ff LE-- -f__-- 1 1-_If - -f -ff <br />Vellft Qpacity of Standoff _I-allow 430 lbs <br />Standoff Demand/Capacity bCR 37.7%