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ENGINEERED POWER SOLUTIONS <br />72 SOUTH MAIN STREET, SUITE A <br />TEMPLETON, CA 93465 <br />Solar Warehouse Rail Analysis – Generic Packet <br />3.0 – SWH Rail Calculations <br />The SWH rail system consists of PV modules supported by two rails that span <br />between anchorage points to anchorage hardware that anchor to the existing <br />framing. <br />The previous sections addressed the various design loads and parameters provided <br />by SWH that have been addressed in this packet. The results for all scenarios were <br />provided in the previous tables. The following pages provide descriptions of the <br />design methodology used as well as an example calculation using a specific set of <br />parameters. <br />For the example calculations, a set of parameters have been chosen which may or <br />may not represent an actual in-field scenario but will illustrate the design processed <br />used for all provided parameters/scenarios. <br />o Example Scenario Design Parameters: <br />▪ Local Code: IBC referencing ASCE 7-16 <br />▪ Module Type: 72 Cell <br />▪ Rail Type: Standard Rail <br />▪ Wind Exposure Category: C <br />▪ Building Ht.: 30 ft. (grade to highest point of PV installation) <br />▪ Design Wind Speed: 120 MPH <br />▪ Design Ground Snow Load: 30 psf <br />▪ Roof Zone: Both Interior Zone and Edge Zone <br />▪ Module Orientation: Portrait <br />▪ Roof Pitch: 10° (Gable or Hip Roof) <br />Note: It is the solar designer/installer or owner’s responsibility to determine the site specific design <br />parameters of each site based on the current governing building code and/or local jurisdiction’s <br />requirements. It is also their responsibility to evaluate the PV layout specific conditions such as <br />roof zone, edge zone factors, anchor capacity, etc. EPS is not responsible for incorrect use of the <br />summary tables or using incorrect design parameters. <br />Page 65 <br />2004 W Picasso - <br />2018062008/29/23