1、Designation:D737421Standard Practice forEvaluating Elevated Temperature Performance of AdhesivesUsed in End-Jointed Lumber1This standard is issued under the fixed designation D7374;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the
2、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 practice is to be used to evaluate the elevatedtemperature performance of adhesives used in end-jointedlumber.
3、1.2 Asymmetric wall assembly containing end-jointed lum-ber studs is exposed to a standard fire exposure specified inTest Methods E119.1.3 The wall assembly shall sustain the applied load duringa standard fire exposure specified in Test Methods E119 for aperiod of 60 min or more.1.4 This practice is
4、 used to evaluate the performance ofadhesives used in end-jointed lumber to heat and flame undercontrolled conditions,but it does not by itself incorporate allfactors required for fire hazard or fire risk assessment underactual fire conditions.1.5 The values stated in inch-pound units are to be rega
5、rdedas 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
6、this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Dec
7、ision 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:2C1396/C1396M Specification for Gypsum BoardD9 Terminology Relating to Wood and Wood-
8、Based Prod-uctsD4688 Test Method for Evaluating Structural Adhesives forFinger Jointing LumberD6513 Practice for Calculating the Superimposed Load onWood-frame Walls for Standard Fire-Resistance TestsE119 Test Methods for Fire Tests of Building Constructionand MaterialsF1667 Specification for Driven
9、 Fasteners:Nails,Spikes,andStaples2.2 Other Standards:ANSI/AF&PA NDS National Design Specification for WoodConstruction33.Terminology3.1 Definitions:3.1.1 For general definitions of terms related to wood,referto Terminology D9.3.2 Definitions of Terms Specific to This Standard:3.2.1 end joint,njoint
10、 formed by adhesive bonding ofmachined,mated surfaces at the ends of two pieces of lumber.3.2.1.1 DiscussionTypical end joint configurations in-clude finger joints and scarf joints.3.2.2 finger joint,nend joint formed by multiple interlock-ing tapered profiles(“fingers”).3.2.3 scarf joint,nend joint
11、 formed by a single taperedprofile.1This practice is under the jurisdiction of ASTM Committee D07 on Wood andis the direct responsibility of Subcommittee D07.02 on Lumber and EngineeredWood Products.Current edition approved July 15,2021.Published August 2021.Originallyapproved in 2008.Last previous
12、edition approved in 2015 as D7374 08(2015).DOI:10.1520/D7374-21.2For 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.3A
13、vailable from American Forest and Paper Association(AF&PA),1111 19thSt.,NW,Suite 800,Washington,DC 20036,http:/www.afandpa.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 inte
14、rnationally 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.13.2.4 end-jointed lumberlumber containing one or m
15、oreend joints.4.Summary of Practice4.1 This practice shall be used to evaluate end-jointedlumber adhesives intended for use in end-jointed lumber by firetesting a wall assembly under a vertical load associated withthe highest visual grade for the species group of DouglasFirLarch or Southern Pine.The
16、 results are deemed applicableto all other species,grades,and joint configurations.NOTE1In the United States,the visual grade and species with thehighest capacity in the ANSI/AF&PA NDS are Select Structural Douglas-fir Larch and Dense Select Structural Southern Pine.5.Significance and Use5.1 End-jointed lumber studs used in fire resistance-ratedassemblies shall be able to support the superimposed designload for the specified time under an elevated temperatureexposure,when a wall assembly is expo
