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P7 <br /> structural <br /> ENGINEERS <br /> February 26, 2020 <br /> SnapNrack <br /> 775 Fiero Lane,Ste. 200 <br /> San Luis Obispo, CA 93401 <br /> TEL: (877)732-2860 <br /> Attn.: SnapNrack-Engineering Department <br /> Subject: Report#2017-03227.11—Engineering Certification and Span Tables for the SnapNrack Ultra Rail Solar <br /> Photovoltaic Racking System <br /> PZSE, Inc.—Structural Engineers has reviewed and analyzed the SnapNrack Ultra Rail Racking System, a proprietary <br /> mounting system constructed from modular parts,which is intended for rooftop installation of solar photovoltaic(PV) <br /> panels; and has provided the attached span tables. This review included the complete system including the "UR-40" <br /> aluminum rail (6005-T56 alloy), attachment devices, splice elements, and PV Panels. All information, data, and analysis <br /> contained within are based on, and comply with,the following building codes and typical specifications: <br /> Building Codes: 1. ASCE/SEI 7-16, Minimum Design Loads for Buildings and Other Structures, by American Society of <br /> Civil Engineers <br /> 2. 2018 International Building Code, by International Code Council, Inc. <br /> 3. 2018 International Residential Code, by International Code Council, Inc. <br /> 4. AC428,Acceptance Criteria for Modular Framing Systems Used to Support Photovoltaic(PV) <br /> Panels, November 1, 2012 by ICC-ES <br /> 5. Aluminum Design Manual 2015, by The Aluminum Association, Inc. <br /> 6. ANSI/AWC NDS-2015, National Design Specification for Wood Construction, by the American <br /> Wood Council <br /> Design Criteria: Risk Category II;Seismic Design Category=A- E <br /> Wind Loads: Basic Wind Speed (ultimate) per ASCE 7-16=95 mph to 190 mph. Includes roof pitches from 0°to 90% <br /> up to 60 feet mean roof height, and exposure categories B, C, & D. Parapets, roof overhangs, and <br /> topographic wind speed adjustment have not been considered. <br /> Snow Loads: Ground Snow Load =0 to 120 (psf). Spans are based on the sloped roof snow load (Ps)corresponding <br /> to each ground snow load. See Appendix A to adjust span tables for non-reducible snow loads. <br /> PV Modules: All solar PV modules with metal frames. "60-Cell"tables are applicable for modules up to 5'-6" (66") <br /> long; "72-Cell"tables are applicable for modules up to 6'-6" (78") long; and "Landscape"tables are <br /> applicable for modules up to 3'4-1/2" (40-1/2") long in the narrow direction. Module length is <br /> defined to be perpendicular to the rail, regardless of panel orientation. <br /> If you have any questions, do not hesitate to call. <br /> Prepared by: <br /> PZSE, Inc.—Structural Engineers <br /> Roseville,CA <br /> 1478 Stone Point Drive,Suite 190, Roseville,CA 95661 <br /> 916.961.3960 916.961.3965 www.pzse.com 1/923 <br />