ASTM_E_2766_-_13.pdf

Designation:E276613Standard Practice forInstallation of Roof Mounted Photovoltaic Arrays on Steep-Slope Roofs1This standard is issued under the fixed designation E2766;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice details minimum requirements for theinstallation of roof mounted photovoltaic arrays on steep-sloped roofs with water-shedding roof coverings.These re-quirements include proper water-shedding integration with theroof system,material properties,flashing of roof penetrations,and sufficient anchoring per regional design load requirements.1.1.1 This practice does not apply to building-integrated oradhesively attached photovoltaic systems that are applied asroof-covering components.1.2 This practice does not cover the electrical aspects ofinstallation.1.3 Installation considerations are divided into two distinctaspects:the interface between the photovoltaic module and thearray mounting structure,and the interface between the arraymounting structure and the roof or roof structure.1.4 Safety and hazard considerations unique to thisapplication,such as worker fall protection,electrical exposure,accessibility of modules,and roof clearance around the perim-eter of the array are addressed by other codes,standards,orauthorities having jurisdiction.1.5 This practice is intended to provide recommendedinstallation practices for use by installers,specifiers,inspectors,or for specification by photovoltaic module manu-facturers.1.6 This practice provides minimum guidelines and shouldbe used in conjunction with module and mounting systemmanufacturers instructions.This practice offers a set of in-structions for performing one or more specific operations.Thisdocument cannot replace education or experience and shouldbe used in conjunction with professional judgment.Not allaspects of this practice may be applicable in all circumstances.ThisASTM Standard is not intended to represent or replace thestandard of care by which the adequacy of a given professionalservice must be judged,nor should this document be appliedwithout consideration of a projects many unique aspects.Theword“Standard”in the title means only that the document hasbeen approved through the ASTM consensus process.1.7 This practice is not intended to replace or supersede anyother applicable local codes,standards or Licensed DesignProfessional instructions for a given installation.1.8 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Specific hazards aregiven in Section 8.2.Referenced Documents2.1 ASTM Standards:2D1079 Terminology Relating to Roofing and WaterproofingD1761 Test Methods for Mechanical Fasteners in WoodE136 Test Method for Behavior of Materials in a VerticalTube Furnace at 750CE772 Terminology of Solar Energy Conversion2.2 AAMA Standards:3AAMA 800 Voluntary Specifications and Test Methods forSealants2.3ASCE Standards:4ASCE 7 Minimum Design Loads for Buildings and OtherStructures2.4 IEC Standards:5IEC 617301(200410)Photovoltaic(PV)Module SafetyQualificationPart One:Requirements for Construction1This practice is under the jurisdiction of ASTM Committee E44 on Solar,Geothermal and OtherAlternative Energy Sources and is the direct responsibility ofSubcommittee E44.09 on Photovoltaic Electric Power Conversion.Current edition approved June 1,2013.Published July 2013.DOI:10.1520/E2766-132For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American Architectural Manufacturers Association(AAMA),1827WaldenOfficeSq.,Suite550,Schaumburg,IL60173,http:/www.aamanet.org.4Available from American Society of Civil Engineers(ASCE),1801 AlexanderBell Dr.,Reston,VA 20191,http:/www.asce.org.5Available from International Electrotechnical Commission(IEC),3,rue deVaremb,P.O.Box 131,CH-1211 Geneva 20,Switzerland,http:/www.iec.ch.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.5 UL Standards:6UL 1703 Standard for Flat-Plate Photovoltaic Modules andPanelsUL746C Polymeric MaterialsUse in Electrical EquipmentEvaluationsUL 609501 Table J.1 Electrotechnical Potentials(V)2.6 Other Standards:IBC International Building Code7IEC International Electrical Code7IFC International Fire Code7NFPA 1 Fire Protection Code8NDS National Design Specification for Wood Construction93.Terminology3.1 Definitions:Definitions of terms used in this stan