ASTM_E_1680_-_11.pdf

Designation:E168011Standard Test Method forRate of Air Leakage Through Exterior Metal Roof PanelSystems1This standard is issued under the fixed designation E1680;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 air infiltrationresulting from either positive or negative air pressure differ-ences.The test method described is for tests with constanttemperature and humidity across the specimen.This testmethod is a specialized adaption of Test Method E283.1.2 This test method is applicable to any roof area.This testmethod is intended to measure only the air leakage associatedwith the field of the roof,including the panel side laps andstructural connections;it does not include leakage at theopenings or perimeter or any other details.1.3 The proper use of this test method requires knowledgeof the principles of air flow and pressure measurements.1.4 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 to be requirements of the test method.1.5 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.6 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 specificprecautionary statements,see Section 7.2.Referenced Documents2.1 ASTM Standards:2E283 Test Method for Determining Rate of Air LeakageThrough Exterior Windows,Curtain Walls,and DoorsUnder Specified Pressure Differences Across the Speci-menE631 Terminology of Building ConstructionsE1592 Test Method for Structural Performance of SheetMetal Roof and Siding Systems by Uniform Static AirPressure DifferenceE1646 Test Method for Water Penetration of Exterior MetalRoof Panel Systems by Uniform Static Air PressureDifference2.2 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 air leakage(Q)the volume of air flowing per unit oftime through the assembled specimen under a test pressuredifference,expressed in cubic feet per minute(cubic metres persecond).3.2.2 extraneous air leakage(QL)the difference betweenthe metered air flow(Qm)and air leakage(Q);the leakage ofthe remainder of the test chamber.3.2.3 metered air flow(Qm)the volume of air flowing perunit of time through the air flow metering system,expressed incubic feet per minute(cubic metres per second).3.2.4 rate of air leakagethe air leakage per unit ofspecimen area(A),expressed in cubic feet per minute persquare foot(cubic metres per second per square metre).3.2.5 reference standard conditionsdry air at a pressure of29.92 in.Hg(101.3 kPa),temperature of 69.4F(20.8C),andair density of 0.075 lb/ft3(1.2 kg/m3).3.2.6 specimenthe entire assembled unit submitted fortesting as described in Section 8.1This 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 Nov.1,2011.Published November 2011.Originallyapproved in 1995.Last previous edition approved in 2003 as E1680 95(2003).DOI:10.1520/E1680-11.2For 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 3.2.7 specimen area(A)the area determined by the overalldimensions of the test specimen expressed in square feet(square metres).The dimensions used to determine area shallnot include exterior framework.3.2.8 test pressure differencethe specified difference instatic air pressure across the fixed specimen,expressed inpounds-force per square foot(pascals).4.Summary of Test Method4.1 The test procedure consists of sealing and fixing a testspecimen into or against one face of an air chamber,supplyingair to or exhausting air from the chamber at the rate r