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.,.y.o <1495 Zephyr Avenue <br /> 1495 Zephyr Avenue r,'• �. <br /> IRONRIDGE iHayward,CA94544 a� '._d, IRONRIDGE Ilayward,CA94544 <br /> i1-800-227-9523 :1-800-227-9523 <br /> I IronRidge.com <br /> IronRidge.com <br /> Attn:Corey Geiger,VP New Markets,IronRidge Inc. The span tables provided in this letter are certified based on the structural performance of IronRidge XR Rails only with no <br /> Date:December 2011,2017 consideration of the structural adequacy of the chosen roof attachments,PV modules,or the underlying roof supporting <br /> members. It is the responsibility of the installer or system designer to verify the structural capacity and adequacy of the <br /> Re:Structural Certification and Span Tables for IronRidge Flush Mount System aforementioned system components in regards to the applied or resultant loads of any chosen array configuration. <br /> This letter addresses the structural performance and code compliance of IronRidge's Flush Mount System. The Flush titEt609Ir <br /> Mount System is a proprietary rooftop mounting system used to support photovoltaic(PV)modules installed in portrait or Sincerely, �, ; er r, <br /> landscape orientation and set parallel to the underlying roof surface. PV modules are supported by extruded aluminum - C E.tv %. <br /> XR Rails and secured to the rails with IronRidge mounting clamps. The XR Rails are side mounted to a selected roof *: rJo 0 n,00 <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. %^o' �'?o E <br /> The IronRidge Flush Mount System is designed and certified to the structural requirements of the following reference •''S;�ONAt `, / Iyrs,y <br /> standards for the load conditions and configurations tabulated in the attached span tables: Gang Xuan,PE,LEED AP ,rrrclt rr,t� ! <br /> Senior Structural Engineer <br /> ASCE/SEI 7-10 Minimum Design Loads for Buildings and Other Structures(ASCE 7-10) <br /> • 2015 International Building Code(IBC-2015) <br /> Florida Building Code 6' 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: j <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 450 or less. <br /> 3. The mean roof height,defined as the average of the roof eave height and the roof ridge height measured from ! <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. j <br /> s <br /> ! <br /> ©2017 IronRidge,Inc. FL Flush Mount System Certification Letter-1 ©2017 IronRidge,Inc. FL Flush Mount System Certification Lotter-3 <br /> ! <br /> 3 <br />