Laserfiche WebLink
© 2022 IronRidge, Inc. CA Flush Mount System Certification Letter - 1 <br />28357 Industrial Blvd. <br />Hayward, CA 94545 <br />1-800-227-9523 <br />IronRidge.com <br />Attn: Sean McDonald, CEO, IronRidge Inc. <br />Date: November 16th, 2022 <br />Re: Structural Certification and Span Tables for the IronRidge Flush Mount System <br />This letter addresses the structural performance and code compliance of IronRidge’s Flush Mount System. The <br />contents of the letter shall be read in its entirety before applying to any project design. The Flush Mount System is a <br />proprietary rooftop mounting system used to support photovoltaic (PV) modules installed in portrait or landscape <br />orientation and set parallel to the underlying roof surface. PV modules are supported by extruded aluminum XR Rails <br />and secured to the rails with IronRidge mounting clamps. The XR Rails are side mounted to a selected roof <br />attachment with 3/8” stainless steel bonding hardware and then attached directly to the roof structure or to a stanchion <br />that is fastened to the underlying roof structure. Assembly details of a typical Flush Mount installation and its core <br />components are shown in Exhibit EX-0015. <br />The IronRidge Flush Mount System is designed and certified to the structural requirements of the reference standards <br />listed below, for the load conditions and configurations tabulated in the attached span tables. <br />•ASCE/SEI 7-16 Minimum Design Loads for Buildings and Other Structures (ASCE 7-16) <br />•2021 International Building Code (IBC-2021) <br />•2022 California Building Code (CBC-2022) <br />•2020 Aluminum Design Manual (ADM-2020) <br />•Report SEAOC (Structural Engineer Association of California) PV2-2017 Wind Design for Solar Arrays <br />The tables included in this letter provide the maximum allowable spans of XR Rails in the Flush Mount System for <br />the respective loads and configurations listed, covering wind exposure categories B, C, & D, roof zones provided in <br />ASCE 7-16 for gable & hip roof profiles, and roof slopes of 8° to 45°. The tabulated spans are applicable when the <br />following conditions are met: <br />1.Span is the distance between two adjacent roof attachment points (measured at the center of the <br />attachment fastener). <br />2.Each module shall be supported by 2 rails (2 rail system) or 3 rails (3 rail system). Spans are calculated <br />based on 2 rail systems, and conservatively deemed acceptable for 3 rail systems. <br />3.The underlying roof slope, measured between the roof surface and horizontal plane, is 8º to 45º. <br />4.The mean roof height, defined as the average of the roof eave height and the roof ridge height measured <br />from grade, does not exceed 30 feet. <br />5.A clearance from the underside of the array to the roof surface of 2” minimum shall be provided and the <br />height of the array, the distance from the module top surface to the roof surface (defined as h2), shall not <br />exceed 10”. <br />6.Module length and area shall not exceed the maximum values listed on the respective span tables. <br />7.All Flush Mount components shall be installed in a professional workmanlike manner per IronRidge’s Flush <br />Mount Installation Manual and other applicable standards for the general roof construction practice. <br />3000 S Sycamore St Unit# <br />A- 201822724/29/2024