ASTM_E_2692_-_10.pdf

Designation:E269210Standard Test Method forStructural Performance of Thermal Barriers in FenestrationProducts1,2This standard is issued under the fixed designation E2692;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 evaluates the longitudinal shearstrength before and after thermal cycling for thermally brokencomposite thermal barriers used in framing of windows,doors,and skylights.It also evaluates the ability of a thermal barrierto maintain its longitudinal dimension after thermal cycling.1.2 This test method is applicable to all fenestration prod-ucts that are constructed with structural thermal barriers thatare affixed along their length to the adjoining metal profile1.3 This test method is meant to be applicable to many typesof fenestration frame types and is not meant to be specific toany single frame construction type.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 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.2.Referenced Documents2.1 AAMA Standards:3AAMA 505 Dry Shrinkage and Composite PerformanceThermal Cycling Test ProcedureAAMA TIR-A8 Performance of Composite Thermal BarrierFraming Systems3.Terminology3.1 Definitions:3.1.1 adhesive failure,nwhen an fenestration framingmember loses the bond with the thermal barrier,during theapplication of the load in the shear test.3.1.2 cohesive failure,nwhen the thermal barrier in afenestration framing member breaks apart within the matrix ofthe thermal barrier itself during the application of the load inthe shear test.3.1.3 fenestration products,nwindows,doors,and sky-lights.3.1.4 longitudinal shear,nshear in a longitudinal plane,orparallel to the longitudinal axis,of the fenestration framingmember.3.1.5 metal failure,nyielding of the metal prior or equal to3mm of displacement in the thermal barrier during the appli-cation of the load in the shear test.3.1.6 room temperature,nfor this test method,it shall bedefined as 22 6 3C.3.1.7 thermal barrier or thermal break,nstructure con-necting inner and outer metal profiles of a fenestration framingmember that consists of a thermally insulating(nonmetallic)material used for the purpose of reducing heat transfer acrossthe assembly.3.1.8 thermally broken composite,na fenestration framingmember composed of an inner and outer metal profile con-nected by a thermal barrier,affixed along their long axis.4.Summary of Test Method4.1 This test method subjects thermally broken fenestrationextrusions to shear load before and after thermal cycling.5.Significance and Use5.1 Thermal barriers require sufficient structural strength tocarry the loads imposed on fenestration members while reduc-ing the heat transfer through the depth of the framing membersthroughout their service life.5.2 Sustained gravity,bending and tensile loads that stressthe thermal barrier(that is,glazing infill weight,wind loads,and glazing gasket pressure)are not covered by this testmethod.1This test method is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is the direct responsibility of Subcommittee E06.51on Performance of Windows,Doors,Skylights and Curtain Walls.Current edition approved Jan.15,2010.Published March 2010.DOI:10.1520/E2692-10.2For 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 the American Architectural Manufacturers Association(AAMA),1827 Walden Office Square,Suite 550,Schaumberg,IL 60173-4268,http:/www.aamanet.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.3 The reader is encouraged to read AAMA TIR-A8 forfurther information on thermal barriers and testing.6.Apparatus6.1 An environmental chamber shall be capable of main-taining a high temperature of 70 6 3C and maintaining a lowtemperature of 29 6 3C and the ability to ramp between thetwo temperatures at a controlled rate,within the time requiredon Fig.1.The chamber shall have at least one thermocouple tomonitor the interior temperature of the chamber.6.2 A universal testing machine or similar equipment with aconstant rate of crosshead movement shall be capable ofexerting a measured force of up to 45 KN at a crosshead speedof 5 mm min.6.3 A test fixture shall be capable of holding one side of thefenestration framing member whil