1、Designation: E2692 10Standard 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 o
2、f 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 brokencompo
3、site 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
4、 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 uni
5、ts 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 regu
6、latory 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 Bar-rier Framing Systems3. Terminology3.1 Definitions:3.1.1 adhesive failure, nwhen an fenestration fr
7、amingmember 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
8、.1.3 fenestration products, nwindows, doors, and sky-lights.3.1.4 longitudinal shear, nshear in a longitudinal plane,or parallel to the longitudinal axis, of the fenestration framingmember.3.1.5 metal failure, nyielding of the metal prior or equalto 3mm of displacement in the thermal barrier during
9、theapplication 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
10、)material used for the purpose of reducing heat transfer acrossthe assembly.3.1.8 thermally broken composite, na fenestration fram-ing member composed of an inner and outer metal profileconnected by a thermal barrier, affixed along their long axis.4. Summary of Test Method4.1 This test method subjec
11、ts 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 membersthr
12、oughout 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.5.3 The reader is encouraged to read AAMA TIR-A8 forfurther information on thermal ba
13、rriers and testing.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: 10.1
14、520/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 Manuf
15、acturers Association(AAMA), 1827 Walden Office Square, Suite 550, Schaumberg, IL 60173-4268,http:/www.aamanet.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Apparatus6.1 An environmental chamber shall be capable of main-taini
16、ng 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
17、 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 while exerting force on theopposite si
18、de of the fenestration framing member. (See Fig. 2.)6.4 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
19、 hot and cold materials.FIG. 1 Thermal Cycling Schedule: One Cycle Air TemperaturesE2692 1028. 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
20、 manufacturers application technique andproduction inventory. In cases in which a complete windowwould use different profiles for sills, jamb, head, or interme-diates, a jamb extrusion may be considered representative ofthe other members provided the thermal barrier cavity pocketdesign, pretreatment
21、, finish type, and manufacturing methodare the same. When the window system being tested is anoperable 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 desi
22、gn, pretreatment, finish type,and manufacturing method are the same.8.2 Each 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
23、cut from a prepared stocklength not less than 2.5 m in length. The stock length 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
24、 testing, cut a 100 6 3 mm section off the lead end ofeach specimen (see Fig. 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 bede
25、fined as the maximum load at failure of the sample or themaximum load up to 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 modeexa
26、mples are, metal failure, cohesive failure, and adhesivefailure.NOTE 1For the purposes of this test procedure, room temperature isdefined as 22 6 3C.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 a
27、t temperatures between29 and 60C for 90 cycles in accordance with Fig. 3. 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 measuringdevice to determine if any dry shrinkage o
28、f 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 environmental chamber and continue
29、 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 theNOTE 1Excerpted from AAMA 505 and used with perm
30、ission of AAMA.FIG. 2 Shear Test FixtureE2692 103completion of 90 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 i
31、n the test fixture (see Fig.2) and load to failure at a crosshead 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
32、failure and adhesivefailure.11. Report11.1 Report the complete description 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 instructio
33、ns for the fenestration manufacture, itshould be acknowledged if these 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
34、 the precycle shearstrength, shrinkage at 30, 60, and 90 cycles and 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 pos
35、sible to specify the precision ofthe procedure in this test method.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 p
36、ocket; skylights; thermalbarrier; windowsASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and th
37、e riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision o
38、f this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should
39、make your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtaine
40、d by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).FIG. 3 Cutting of Stock MaterialE2692 104
