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© 2021 IronRidge, Inc.CA Flush Mount System Certification Letter - 1 Hayward, CA 94545 1-800-227-9523 IronRidge.com Attn: Corey Geiger, COO, IronRidge Inc. Date: August 31st, 2021 Re: Structural Certification and Span Tables for IronRidge Flush Mount System This letter addresses the structural performance and code compliance of IronRidge’s Flush Mount System. The contents of the letter shall be read in its entirety before being applied to any project design. The Flush Mount System is a proprietary rooftop mounting system used to support photovoltaic (PV) modules installed in portrait or landscape orientation and set parallel to the underlying roof surface. PV modules are supported by extruded aluminum XR Rails and secured to the rails with IronRidge mounting clamps. The XR Rails are side mounted to a selected roof attachment with 3/8” stainless steel bonding hardware and then attached directly to the roof structure or to a stanchion that is fastened to the underlying roof structure. Assembly details of a typical Flush Mount installation and its core components are shown in Exhibit EX-0015. The IronRidge Flush Mount System is designed and certified to the structural requirements of the reference standards listed below, for the load conditions and configurations tabulated in the attached span tables. •ASCE/SEI 7-10 Minimum Design Loads for Buildings and Other Structures (ASCE 7-10) •2015 International Building Code (IBC-2015) •2016 California Building Code (CBC-2016) •2015 Aluminum Design Manual (ADM-2015) The tables included in this letter provide the maximum allowable spans of XR Rails in the Flush Mount System for the respective loads and configurations listed, covering wind exposure categories B, C, & D, roof zones 1, 2 & 3, and roof slopes from 8º to 45º. The span tables are applicable provided that the following conditions are met: 1.Span is the distance between two adjacent roof attachment points (measured at the center of the attachment fastener) 2.The underlying roof slope, measured between roof surface and horizontal plane, is 8º to 45º. 3.Each module shall be supported by 2 rails (2 rail system) or 3 rails (3 rail system). Spans are calculated based on 2 rail systems, and conservatively deemed acceptable for 3 rail systems. 4. The mean roof height, defined as the average of the roof eave height and the roof ridge height measured from grade, does not exceed 30 feet. 5.Module length and area shall not exceed the maximum values listed on the respective span tables. 6.All Flush Mount components shall be installed in a professional workmanlike manner per IronRidge’s Flush Mount installation manual and other applicable standards for general roof construction practice. 2314 W San Lorenzo Ave11/17/2023