1、Designation:D724717Standard Test Method forEvaluating the Shear Strength of Adhesive Bonds inLaminated Wood Products at Elevated Temperatures1This standard is issued under the fixed designation D7247;the number immediately following the designation indicates the year oforiginal adoption or,in the ca
2、se 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 standard describes a test method for evaluating thecomparative shear strength of a planar a
3、dhesive bond at bothambient and elevated temperatures relative to the performanceof solid wood under the same conditions.The test method isbased on the breaking load after the specimen is exposed toeither ambient or a constant elevated temperature for a speci-fied duration as described in Section 7.
4、This standard does notpreclude the development and implementation of other meth-ods that provide equivalent performance meeting the intent ofthis method.1.2 This test method is intended for the evaluation ofadhesives that can be used to assemble test specimens inaccordance with Test Method D905.The
5、evaluation of othertypes of adhesives,such as the binder systems used forstrand-based products,is beyond the scope of this test method,except as noted in 1.4.1.3 This test method is intended for the evaluation ofadhesives as a component of laminated wood products atelevated temperatures.The evaluati
6、on of fire performance onfire-rated laminated wood products or assemblies is beyond thescope of this test method.1.4 This test method may be used for the evaluation of heatdurability for binder adhesives used in strand-based structuralwood composites,such as oriented strand lumber(OSL)andlaminated s
7、trand lumber(LSL),by substituting strand-basedcomposite specimens for the bonded specimens.1.5 The formulation of adhesive supplied to the manufac-turer of laminated wood products shall be evaluated.Modifi-cations to the adhesive formulation require a separate evalua-tion unless approved by the manu
8、facturer of the laminatedwood product,qualified agency,and code evaluation agency.1.6 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with
9、 its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accor-dance with internationally recognized princ
10、iples on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D905 Test Method for Strength Proper
11、ties of AdhesiveBonds in Shear by Compression LoadingD907 Terminology of AdhesivesD2395 Test Methods for Density and Specific Gravity(Rela-tive Density)of Wood and Wood-Based MaterialsD2915 Practice for Sampling and Data-Analysis for Struc-tural Wood and Wood-Based ProductsD4933 Guide for Moisture C
12、onditioning of Wood andWood-Based MaterialsD5266 Practice for Estimating the Percentage of WoodFailure in Adhesive Bonded JointsD5456 Specification for Evaluation of Structural CompositeLumber Products2.2 Other Documents:ANSI A190.1 American National Standard for Wood Prod-ucts Structural Glued Lami
13、nated Timber3ANSI/AWC NDS-2015 National Design Specification forWood Construction(NDS)3Wood Handbook Wood as an Engineering Material41This test method is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.30 on WoodAdhesives.Current edition
14、approved Oct.15,2017.Published November 2017.Originallyapproved in 2006.Last previous edition approved in 2016 as D7247 16.DOI:10.1520/D7247-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volum
15、e information,refer to the standards Document Summary page onthe ASTM website.3APA The Engineered Wood Association,7011 S.19th St.,Tacoma,WA98466,www.apaword.org.4Available from U.S.Department ofAgriculture,Forest Service,Forest ProductsLaboratory,One Gifford Pinchot Drive Madison,WI 53726,www.fpl.f
16、s.fed.us.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 theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 3.Terminology3.1 Definitions:3.1.1 Many terms in this test method a
