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PPurelight Powe- <br />Ironridge Quick Mount L-Mount Connection Calculation <br />This calculation justifies the connection of the solar panels to existing roof members, by <br />showing the connection capacity is equal to or greater than the uplift force demands. <br />Connection Demand <br />Spacing perpendicular to rail <br />Roof Angle <br />Wind Speed <br />Exposure Coefficient, KZ <br />Topographic Factor, K, <br />Directionality Factor, Kd <br />Elevation Factor, Ke <br />Velocity Pressure, qZ <br />Prying Coefficient <br />Spacing parallel to rail <br />Effective Wind Area on each connection <br />GCp (max) <br />Exposed Panels? (YE = 1.5) <br />Pressure Equalization Factor, Ya <br />32.5 <br />in <br />20 <br />degrees <br />110 <br />mph <br />0.57 <br />1 <br />0.85 <br />1.00 <br />16.0 <br />psf <br />1 <br />Zone 1 <br />Zone 2e <br />1/2 panel length <br />Zone 3 <br />48 <br />48 <br />48 <br />10.8 <br />10.8 <br />10.8 <br />1.80 <br />2.57 <br />2.57 <br />No <br />No <br />No <br />0.79 0.79 <br />Uplift Force <br />22.6 32.3 <br />Max. Uplift Force / Connection (0.6 WL) <br />147.2 209.9 <br />Solar Dead Load (0.6 DL) <br />17.9 17.9 <br />Max. Uplift Force (0.6 WL - 0.6 DL) <br />129.3 192.1 <br />Connection Capacity <br />Ironridge Quick Mount L-Mount <br />Fastener Type <br />Lag Screw <br />Fastener Diameter <br />0.3125 <br />in <br />Embedment Length, min <br />2.5 <br />in <br />Lumber Species & Grade <br />DFL #2 (Assumed) <br />Lumber Specific Gravity <br />0.5 <br />Nominal Withdrawal Capacity, W <br />665.0 <br />Ibs <br /># of Screws <br />1 <br />Load Duration Factor, CD <br />1.6 <br />Adjusted Withdrawal Capacity, W' <br />1064.0 Ibs <br />Compare Adjusted Withdrawal Capacity <br />to ASD Factored Demand <br />7nna 1 7nna ')a <br />O. K. O. K. <br />0.79 <br />32.3 <br />209.9 <br />17.9 <br />192.1 <br />Zone 3 <br />O. K. <br />in <br />ft2 <br />psf <br />Ibs <br />Ibs <br />Ibs <br />Max spacing <br />NDS 12.2-1 <br />