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918 12.11 11,121 <br />0 0.00 0 <br />324 5.00 1,620 <br />528 8.50 4,488 <br />Net Weight of Existing Building Elements (Wexist)17,229 <br />Check % Increase in Weight: PV System / Ex. Building Elements <br />% increase of Pcr of Lateral Force Reisiting System Wpv / Wexist 2.9% <br />Increase in Seismic Shear Load <10%: OK <br />Note: Seismic base shear is directly proportional to roof weight. Pcr = critical buckling load <br />DOWNWARD <br />Presume loading directly over member. <br />Combined Dead and Wind Pressure Downward Loading <br />Rafter span <br />PV <br />Module <br />Row <br />Point load <br />loc's from <br />Left <br />support <br />Module <br />Support <br />Point Load <br />Comment Module <br />Orientation <br />ft from left lb <br />1 4.50 0 Support placed on adjoining rafter Portrait <br />1 10.15 70 Portrait <br />Interior Walls (top half) <br />Exterior Walls (top half) <br />Existing Roof <br />Insulation, MEP, Ceiling <br />Array AR-2 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.11 of 13 <br />2341 S Park Dr - <br />10-26-231/22/2024