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Roof Structural Calculations for PV Solar Installation Array AR-1 <br />Location: MP 1 <br />deg.14.00 <br />ft.54.00 <br />ft.17.00 <br />ft.15.00 <br />Roof Wind Zone Width <br />use, a =3.00 ft <br />Wind Velocity Pressure, q z evaluated at the height z <br />q z=13.77 psf Vasd q z=8.34 psf Basic wind pressure <br />V=95 mph <br />Framing Data <br />in 24.00 72 Max. Rack Support Spacing (in) <br />ft 15.00 18 # Modules / Roof Plane <br />Member * Mem properties based upon field measurements <br />(1)2x6 Rafter <br />Uphill Dist Between Mounting Holes (ft) <br />Module Physical Data <br />kg lb psf load <br />21.70 47.84 2.28 <br />0.73 1.6 0.08 <br />Units Value Description <br />psf 1.01 <br />psf 11.10 0.50 in. Plywood w/ Roof Tile <br />psf 12.11 <br />psf 2.35 <br />ASCE 7-16 Method for Calculating Uplift on PV Modules <br />Notation <br />Lp = Panel chord length. <br />p = uplift wind pressure <br />γa = Solar panel pressure equalization factor, defined in Fig. 29.4-8. <br />γE = Array edge factor as defined in Section 29.4.4. <br />θ = Angle of plane of roof from horizontal, in degrees. <br />29.4.4 Rooftop Solar Panels Parallel to the Roof Surface on Buildings of All Heights and Roof Slopes. <br />Ө >= 7 deg TRUE <br />Exposed FALSE <br />1.5(Lp) = 5.58 <br />γE = 1 <br />γa = 0.67 <br />p = qh(GCp) (γE) (γa) (lb ∕ft2) (29.4-7) <br />Zones 1,2e 2n,2r,3e 3r <br />p, Windload (psf)-10.94 -14.16 -19.84 <br />Wind Loading Module <br />Upward <br />Module <br />Upward <br />Module <br />Upward Downward <br />Weight <br />Member Total Length <br />Member Properties <br />Name <br />Existing Dead Loads <br />Roof Deck & Surface <br />Sum Existing DL Roof Loads <br />Proposed PV Dead Load <br />Geometric Data <br />Angle of roof plane from horizontal, in degrees <br />Length of roof plane, in feet (meters) <br />Plan view width of roof plane, in feet (meters) <br />Average height of roof above grade, in feet (meters) <br />Rafter / Truss OC <br />Ө <br />L <br />W <br />h <br />Framing Members <br />PV Module + Stanchion <br />4 Stanchions <br />Module <br />Array AR-1 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.5 of 9 <br />2341 S Park Dr - <br />10-26-231/22/2024