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BLD2023-0520_Structural_Calculations_4.27.2023_1.52.00_PM_3509989ON 23'-6" 3'-4" 24" 72" 72" 72" 48" 18" II I II I I I I II 1 1 II 1 II I II � I I rl I� I I I r1 r I I I I I -i I I II r r SOLTERRA GLOBAL, LLC. PHONE: 206 462-1103 II II II I II II II II I II II II �� I II II II II I II II II II 11 11 11 I 3„ 11 LICENSE NO. SOLTEGL838BS II II I II II II II a ll II II II II II I II II II I II I III II I II CONFIDENTIAL: THE INFORMATION CONTAINED II r II rh 11 II ri 11 r r IN THIS DRAWING SET IS CONFIDENTIAL AND I IIn I I I I I II II I I SHALL NOT BE DISCLOSED IN FULL OR IN PART TO ANYONE EXCEPT THOSE INVOLVED IN THE r r I I I I I I I I r DESIGN AND INSTALLATION OF THE PV SYSTEM UNIRAC FLASHLOC RM I II II II I REPRESENTED IN THIS PLAN. MOUNTING ATTACHMENT I I I I I II I I I I I I I I I I I I I 13.5 @ 72" O.C. SPANS I I I I I I I I I REC SOLAR REC410AA PURE II II II I II II II II PV MODULE, TYP. r, I II II II r, I r� II r O II II II M IRON RIDGE XR-100 SERIES RACKING RAIL II r1h II I hh II II r CV �- 6ri H. L u O 2" X 6" RAFTER I I I I I I I II II II I II I I I I �' CN U O @ 24" O.C. I I I I I I I I I II II II II I II 30'-1" U-i w Z co II II II II I II C ) Q II II II II I II I I r I I ri Fi I I I rH Hi W = II II ITr 11 II N C%1 LI I of M Z II II II II I II II Z:) O II II II II I II � O II II II I II O Q II II II I II I II II II II I II U LJJ 11 11 II II II I r� II r-1 r lqJ II II II I II II II r� r' W I II II II II II II II I II II II II II II I II II II II II II II I ii II II II II II II II =-� II Z I II II II II II II II II I II II II II II II II II I II II II II II II II li II II II II II I II II II II II II II II I II II II II II II II II I II II II II II II II II II I II II II II II II II II II I II II II II II II II II II I II II II II II II II II II r - II II II II II II I II II II II II II II II II I II II II II II II II II II I II II II II II II II II II .I II II II II 'I II II II II II II II II II II II II 72" 72" II II II II II II II II II II II II 72" 6'_p" — 26'-11" ATTACHMENT PLAN RAFTER SPACING 24" O.C. LOCAL DESIGN CRITERIA WIND EXPOSURE CATEGORY B RISK CATEGORY II DESIGN WIND SPEED 110 MPH DESIGN SNOW LOAD 15 PSF ATTACHMENT PLAN NOTES 1 ROOF MEMBERS AND PENETRATIONS TO BE DETERMINED IN THE FIELD. 2 THE SOLAR PHOTOVOLTAIC INSTALLATION SHALL NOT OBSTRUCT ANY PLUMBING, MECHANICAL, OR BUILDING ROOF VENTS. PLEASE SEE SHEETS PV-6A AND PV-68 FOR DETAILS REGARDING THE MOUNTING ATTACHMENT TO BE USED, AS WELL AS THE RELEVANT INSTALLATION INSTRUCTIONS. PLEASE SEE SHEET PV-11 FOR A STRUCTURAL CERTIFICATION LETTER FOR THE IRON RIDGE FLUSH MOUNT 4 SYSTEM. LETTER IS STAMPED BYA STATE OF WASHINGTON REGISTERED PROFESSIONAL ENGINEER (PE). IRONRIDGE Attn: Corey Geiger, COO, IronRidge Inc. Date: September 7t'', 2021 Re: Structural Certification and Span Tables for the IronRidge Flush Mount System 28357 Industrial Blvd. Hayward, CA 94545 1-800-227-9523 IronRidge.com 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 applying 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 7-16 Minimum Design Loads for Buildings and Other Structures (ASCE 7-16) • 2018 International Building Code (IBC-2018) • 2018 Washington State Building Code • 2015 Aluminum Design Manual (ADM-2015) • Report SEAOC (Structural Engineer Association of California) PV2-2017 Wind Design for Solar Arrays 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 provided in ASCE 7-16 for gable & hip roof profiles, and roof slopes of 8° to 45°. The tabulated spans are applicable when 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. 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. 3. The underlying roof slope, measured between the roof surface and horizontal plane, is 80 to 450. 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. A clearance from the underside of the array to the roof surface of 2" minimum shall be provided and the height of the array, the distance from the module top surface to the roof surface (defined as h2), shall not exceed 10". 6. Module length and area shall not exceed the maximum values listed on the respective span tables. 7. All Flush Mount components shall be installed in a professional workmanlike manner per IronRidge's Flush Mount Installation Manual and other applicable standards for the general roof construction practice. ©2021 IronRidge, Inc. WA Flush Mount System Certification Letter - 1 Af& IRONRIDGE 28357 Industrial Blvd. Hayward, CA 94545 1-800-227-9523 IronRidge.com The span tables provided in this letter are certified based on the structural performance of IronRidge XR Rails only with no consideration of the structural adequacy of the chosen roof attachments, PV modules, or the underlying roof supporting members. It is the responsibility of the installer or system designer to verify the structural capacity and adequacy of the aforementioned system components in regards to the applied or resultant loads of any chosen array configuration. Sincerely, Nl~ 202 1.09.07 GP ��p4 evn.criil 15:5 5:03 d Nn1 r'� c'rsrt�i�� '-07'00' SSrr�`�. Gang Xuan, PE Senior Structural Engineer PHONE; (206) 462-1103 1 CONFIDENTIAL: THE INFORMATION CONTAINED IN THIS DRAWING SET IS CONFIDENTIAL AND SHALL NOT BE DISCLOSED IN FULL OR IN PART TO ANYONE EXCEPT THOSE INVOLVED IN THE DESIGN AND INSTALLATION OF THE PV SYSTEM REPRESENTED IN THIS PLAN, M CV UJ o � UJ C/) � UJ U W LU Z Z � o o rn Q CO 0 U UJ C� UJ Z ENGINEERING LETTER © 2021 IronRidge, Inc. WA Flush Mount System Certification Letter - 4 1 PROJECT NO: GSD-20230419-184873 1 STATE OF WASHINGTON ENGINEERING LETTER (RACKING) V-11 SCALE: NTS PV-1 1