4417 1%2 W Oakfield Ave- DL - Plan

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© 2018 IronRidge, Inc. CA Flush Mount System Certification Letter - 1 1495 Zephyr Avenue Hayward, CA 94544 1-800-227-9523 IronRidge.com Attn: Corey Geiger, COO, IronRidge Inc. Date: September 7th, 2018 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 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 0º 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 pitch, measured between roof surface and horizontal plane, is 45º or less. 3. 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. 4. Module length shall not exceed the listed maximum dimension provided for the respective span table and module width shall not exceed 48”. 5. 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. 4417 1%2 W Oakfield Ave04/12/22