1、Designation: E2692 10 (Reapproved 2018)Standard Test Method forStructural Performance of Thermal Barriers in FenestrationProducts1This standard is issued under the fixed designation E2692; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revi
2、sion, 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 therm
3、ally 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
4、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 asstanda
5、rd. 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, health, and environmental practices and dete
6、r-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendat
7、ions issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 AAMA Standards:2AAMA 505 Dry Shrinkage and Composite PerformanceThermal Cycling Test ProcedureAAMA TIR-A8 Performance of Composite Thermal BarrierFraming Systems3. Terminology3.1 Definit
8、ions: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
9、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
10、 to3 mm of displacement in the thermal barrier during theapplication of the load in the shear test.3.1.6 room temperature, nfor this test method, it shall bedefined as 22 6 3 C.3.1.7 thermal barrier or thermal break, nstructure con-necting inner and outer metal profiles of a fenestration framingmemb
11、er 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 ax
12、is.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 he
13、at transfer through the depth of the framing membersthroughout their service life.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
14、edition approved Sept. 1, 2018. Published September 2018. Originallyapproved in 2010. Last previous edition approved in 2010 as E269210. DOI:10.1520/E269210R18.2Available from the American Architectural Manufacturers Association(AAMA), 1827 Walden Office Square, Suite 550, Schaumberg, IL 60173-4268,
15、http:/www.aamanet.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for t
16、heDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15.2 Sustained gravity, bending and tensile loads that stressthe thermal barrier (that is, glazing infill weight, wind loads,and glazing gasket pres
17、sure) are not covered by this testmethod.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 3 C and maintaining a lowtemperature of 29 6 3 C and t
18、he 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 sh
19、all 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 while exerting force on theopposite side of the fenestration framing member. (See Fig. 2.)FIG. 1 Thermal Cycling Schedul
20、e: One Cycle Air TemperaturesE2692 10 (2018)26.4 A measuring device capable of measuring 0.03 mmincrements.7. Hazards7.1 Take precautions when working near the testing ma-chine for specimens breaking under loading and creating flyinghazards. Take appropriate precautions when working aroundthe hot an
21、d cold materials.8. Test Specimens8.1 Test specimens shall be actual window extrusions froma manufactures production inventory. The test extrusionspretreatment, finish, and coating shall be identified and con-sistent with the manufacturers application technique andproduction inventory. In cases in w
22、hich a complete windowwould use different profiles for sills, jamb, head, orintermediates, a jamb extrusion may be considered represen-tative of the other members provided the thermal barrier cavitypocket design, pretreatment, finish type, and manufacturingmethod are the same. When the window system
23、 being tested isan operable window with frame and sash both using similarthermal barriers, then the jamb member of the sash shall beconsidered representative of the other members provided thethermal barrier cavity pocket design, pretreatment, finish type,and manufacturing method are the same.8.2 Eac
24、h individual specimen shall be a minimum of700 mm in length. The width and thickness will vary.8.3 A minimum of three specimens at 700 mm in lengthshall be submitted for testing.9. Conditioning9.1 The test specimens shall be cut from a prepared stocklength not less than 2.5 m in length. The stock le
25、ngth materialshall be conditioned a minimum of seven days at roomtemperature prior to cutting the three 700 mm specimensrequired for further testing.10. Procedure10.1 Precycle Shear Strength DeterminationBefore ther-mal cycle testing, cut a 100 6 3 mm section off the lead end ofeach specimen (see Fi
26、g. 3). Place the specimens one at a timein the test fixture (see Fig. 2) and load to failure at a crossheadspeed of 5 mm/min at room temperature. Record the peak loadvalues and failure mode. Failure of the specimen shall bedefined as the maximum load at failure of the sample or themaximum load up to
27、 a relative axial displacement of the metalfaces of 3 mm measured at one of the metal/thermal barrierinterfaces, whichever comes first. Report the mode of failure, ifany was present, at the end of the testing. Failure modeexamples are, metal failure, cohesive failure, and adhesivefailure.NOTE 1For t
28、he purposes of this test procedure, room temperature isdefined as 22 6 3 C.10.2 Cyclic Soak Thermal TestPlace the test specimens,600 6 3 mm long, in an environmental chamber. Conditionedair shall be cycled over the specimens at temperatures between29 and 60 C for 90 cycles in accordance with Fig. 3.
29、 Uponcompletion of 30 thermal cycles, observe each end of eachspecimen for thermal barrier movement relative to the metalextrusion, often referred to as dry shrinkage. Use the measuringNOTE 1Excerpted from AAMA 505 and used with permission of AAMA.FIG. 2 Shear Test FixtureE2692 10 (2018)3device to d
30、etermine if any dry shrinkage of the thermal barrierhas occurred on each end of the fenestration frame member tothe nearest millimeter and record the information. Displace-ment of the profile may occur and measurements need to betaken from the same side of the profile. Return the specimensto the env
31、ironmental chamber and continue testing. Upon thecompletion of 60 thermal cycles, observe each end of eachspecimen and measure any thermal barrier movement relativeto the metal extrusion as done earlier. Return the specimens tothe environmental chamber and continue testing. Upon thecompletion of 90
32、thermal cycles, observe each end of eachspecimen and measure any shrinkage as done earlier.10.3 Postcycle Shear Strength DeterminationCut a100 6 3 mm section off each end of each specimen (see Fig.3). Place the samples one at a time in the test fixture (see Fig.2) and load to failure at a crosshead
33、speed of 5 mm min atroom temperature. Record the peak load values and failuremode. Failure of the specimen shall be defined as the maxi-mum load at failure. Report the mode of failure. Failure modeexamples are metal failure, cohesive failure and adhesivefailure.11. Report11.1 Report the complete des
34、cription of the test specimens,including metal alloy and temper, finish, thermal barriermaterial, and supplier of thermal barrier material. If thesupplier of the thermal barrier material has special handlingand installation instructions for the fenestration manufacture, itshould be acknowledged if t
35、hese instructions were followed.List the manufacturer of the fenestration profile and the seriesof product. Include a diagram of the shape. Report anydeviations from the test method procedure.11.2 Report the test data and averages for the precycle shearstrength, shrinkage at 30, 60, and 90 cycles an
36、d post cycleshear strength. Report the mode of failure, if any was present,at the end of the testing in 10.1 and 10.3 (for example, metalfailure, cohesive failure, or adhesive failure.)12. Precision and Bias12.1 PrecisionIt is not possible to specify the precision ofthe procedure in this test method
37、.12.2 BiasNo justifiable statement can be made on the biasof the procedure in this test method because the bias of this testmethod within or between laboratories has not been estab-lished.13. Keywords13.1 doors; glazing leg; glazing pocket; skylights; thermalbarrier; windowsFIG. 3 Cutting of Stock M
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