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- <br /> 1495 Zephyr Avenue 1495 Zephyr Avenue <br /> '�� <br /> AFMA I RON RI DGE Hayward,CA 94544 'I RON RI DGE f=800.Ftaywa 544 <br /> rd,rd,CA CA2 94 <br /> 1-800-227-9523 .. � � � <br /> iro <br /> Attn:Corey Geiger,VP New Markets,IronRidge Inc. The I.span tables provided in this leier are certified based on the structdral partormance.of IronRidge XR Rails only with n.a <br /> Date:December 201h,2017 consideration of the;structural adegbacy of the chosen roof attachments;PV,modules,_or the underlying roof supporting <br /> members. It is the respdnsibiiity:of the installer or systetn designer to verify the structural.capacity'and adequacy,of the <br /> Re:Structural Certification and Span Tables for IronRid a Flush Mount System <br /> P 9 Y '"' aforementioned systern.corn'ponents in'regards to the ori�esultanfloads of any array configuration. <br /> This letter addresses the structural performance and code compliance of IronRidge's Flush Mount System. The Flush <br /> Mount System is a proprietary rooftop mounting system used to support photovoltaic(PV)modules installed in portrait or Sincerely; ���:�0ir`S?G-;JU`q"�,�� <br /> landscape orientation and set parallel to the underlying roof surface. PV modules are supported by extruded aluminum <br /> XR Rails and secured to the rails with IronRidge mounting clamps. The XR Rails are side mounted to a selected roof * No <br /> attachment with 318"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. r 0; AlCE--�, L ti <br /> AN <br /> { {i <br /> The IronRidge Flush Mount System is designed and certified to the structural requirements of the following reference f'.�S .�''C,- I2�2piygf 7, <br /> standards for the load conditions and configurations tabulated in the attached span tables: Gang Xuan,PE;LEED AP -',�r �ir�i Ct <br /> :Senior Struotural;Engineer <br /> ASCEISEI 7-10 Minimum Design Loads for Buildings and Other Structures(ASCE 7-10) <br /> 2015 International Building Code(IBC-2015) " <br /> Florida Building Code 61^Edition(2017)Building <br /> 2015 Aluminum Design Manual(ADM-2015) - <br /> The tables included in this letter provide the maximum allowable spans of XR Rails in the Flush Mount System for the <br /> respective loads and configurations listed,covering wind exposure categories B,C,&D,roof zones 1,2&3,and roof <br /> slopes from 00 to 450. The span tables are applicable provided that the following conditions are met: <br /> 1. Span is the distance between two adjacent roof attachment points(measured at the center of the attachment <br /> fastener) <br /> 2. The underlying roof pitch,measured between roof surface and horizontal plane,is 45°or less. <br /> 3. The mean roof height,defined as the average of the roof eave height and the roof ridge height measured from j <br /> grade,does not exceed 30 feet. <br /> 4. Module length shall not exceed the listed maximum dimension provided for the respective span table and module <br /> width shall not exceed 40". <br /> 5. All Flush Mount components shall be installed in a professional workmanlike manner per IronRidge's Flush Mount <br /> installation manual and other applicable standards for general roof construction practice. <br /> i <br /> I <br /> 49 2017 IronRidge,Inc. FL Flush Mount System Certification Letter-1 (02017 IronRidge;inc; _FL Flush Mount System Certification Letter-3 <br />