ASTM_E_1646_-_95_2011.pdf

Designation:E164695(Reapproved 2011)Standard Test Method forWater Penetration of Exterior Metal Roof Panel Systems byUniform Static Air Pressure Difference1This standard is issued under the fixed designation E1646;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 test method covers the determination of the resis-tance of exterior metal roof panel systems to water penetrationwhen water is applied to the outdoor face simultaneously witha static air pressure at the outdoor face higher than the pressureat the indoor face,that is,positive pressure.This test method isa specialized adaption of Test Method E331.1.2 This test method is applicable to any roof area and isintended to measure only the water penetration associated withthe field of roof including panel side laps and structuralconnections.It does not include leakage at openings orperimeter or any other details.1.3 This test method is limited to specimens in which theside seams and attachments are clearly visible and in which thesource of leakage is readily determined.Composite systems inwhich the source cannot be readily determined are outside thescope of this test method.1.4 The proper use of this test method requires a knowledgeof the principles of pressure and flow measurement.1.5 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are forinformation only and may be approximate.1.6 The text of this test method references notes andfootnotes excluding tables and figures,which provide explana-tory material.These notes and footnotes shall not be consid-ered as requirements of the test method.1.7 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.For specific hazardstatements,see 7.1.2.Referenced Documents2.1 ASTM Standards:2E331 Test Method for Water Penetration of ExteriorWindows,Skylights,Doors,and Curtain Walls by Uni-form Static Air Pressure DifferenceE631 Terminology of Building ConstructionsE1680 Test Method for Rate of Air Leakage Through Exte-rior Metal Roof Panel SystemsE1592 Test Method for Structural Performance of SheetMetal Roof and Siding Systems by Uniform Static AirPressure Difference2.2 Other Standards:AAMA 501 Methods of Test for Metal Curtain Walls33.Terminology3.1 DefinitionsFor definitions of general terms relating tobuilding construction used in this test method,see TerminologyE631.3.2 Definitions of Terms Specific to This Standard:3.2.1 specimenthe entire assembled unit submitted for testas described in Section 8.3.2.2 test pressure differencethe specified difference instatic air pressure across the assembled and fixed specimenexpressed as pounds-force per square foot(newtons per squaremetre(pascals).3.2.3 water leakagepenetration of water onto the exposedinside surface of the test specimen under specified conditionsof air pressure difference across the specimen during a 15-mintest period.Water penetration at or around end dams or siderails is not leakage;end dams and side rails are installed tocause and control ponding over the panels and to support thepanels.They are not part of the roof.1This test method is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is the direct responsibility of Subcommittee E06.57on Performance of Metal Roof Systems.Current edition approved March 1,2011.Published March 2011.Originallyapproved in 1995.Last previous edition approved in 2003 as E1646 95(2003).DOI:10.1520/E1646-95R11.2For 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 Architectural Aluminum Manufacturers Association(AAMA),1827 Walden Office Square,Suite 550,Schaumburg,IL 60173,http:/www.aamanet.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Summary of Test Method4.1 This test method consists of sealing and fixing the testspecimen into or against one face of a test chamber,supplyingair to or exhausting air from the chamber at the rate required tomaintain the test pressure difference across the specimen,whilespraying water onto the outdoor face of the specimen at therequired rate and observing any water leakage.5.Significance and Use5.1 This test method is a standard procedure for determiningthe resistance to water penetration under uniform positive staticair pressure differences,and simulates wind driven rain im-posed on sidelap