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'CALCULATION OF DESIGN WIND LOADS - MP1 I <br />Mounting Plane Information <br />Roofing Material Comp Roof <br />PV System Type ·SolarCity SleekMount™ <br />PV System Module Orientation Landscape and Portrait <br />Spanning Vents iNo <br />Standoff (Attachment Hardware)Comp Mount Type C <br />Roaf Slope 34° <br />Rafter Spacing 32" O.C <br />Wind Design Criteria <br />Wind Design Code ASCE 7-10 <br />Wind Design Method Partially/Fully Enclosed Method <br />Basic Wind Speed V 110 mph Fig. 26.5-lA <br />Exposure Category C 'Section 26.7 <br />Roof Style Gable Roof Fig. 30.4-ZA/B/C-5A/B <br />Mean Roof Height h 15 ft Section 26.2 <br />Effective Wind Area (1 Module) A 17.3 sf IBC 1509.7.1 <br />Wind Pressure Calculation Coefficients <br />Wind Pressure Exposure Kz <br />Iopographic Factof 1<zE <br />Wind Directionality Factor Kd <br />Importance Factor I <br />Velocity Pressure h <br />0.85 <br />1.00 <br />0.85 <br />NA <br />qh = 0.00256 (Kz) (Kzt) (Kd) (VU) <br />22.4 psf <br />Table 30.3-1 <br />Section 26.8 <br />Section 26.6-1 <br />Equation 30.3-1 <br />Wind Pr.essure <br />Ext. Pressure Coefficient (Up)GCD, r Up) <br />Fig. 30.4-2ALB/.C-5A/B <br />-0.95 Fig. 30.4-2A/13/C-5A/B <br />Ext. Pressure Coefficient (Down)GCD (Downi 0.88 <br />Design Wind Pressure p p=qh (GCD Equation 30.4-1 <br />Wind Pressure Up Ptup)-21.3 psf <br />Wind Pressure Down 'Pfdown)19.6 psf <br />ALLOWABLE STANDOFF SPACINGS <br />X-Direction Y,Direction <br />. Max Allowable Randoff Spacing Landscape 64"39" <br />ME. Allowable Cantilever Landscape . 24" NA <br />Standoff Configuration Landscape Staggered <br />Max Standgff Tributary Area Trib 17 sf <br />PV Aaembly Dead Load W-PV 3 psf <br />*1 iN'uld- Upliftattgndoff T-actual -2194 lbs <br />Uplift Capac.ity_of Star'*ff T-allow 500 I bs: <br />Standoff Demand/Capacity DCR "'38.8% <br />1 X-Direction Y-Direction <br />Max Allowable Standoff_Sp®ing_ _Por·trait 64"65" <br />Max Allgwable Car*liever_ _ __-_ Portrait - _ _--1911 - ---- -- <br />Standoff Configuration Portrait Staggered <br />Max Standoff Tributary Area Trib _29 sf <br />PV Assembly Dead Load W-PV 3 psf <br />Net mid Uplift at Standoff T-gctual -325 lbs <br />Uplift Capacity of Standoff T-allow 500 lbs <br />Standoff Demand/Capacity DCR 64.7% <br />4. <br />1, <br />1