1、Designation:E276811(Reapproved 2018)An American National StandardStandard Test Method forExtended Duration Surface Burning Characteristics ofBuilding Materials(30 min Tunnel Test)1This standard is issued under the fixed designation E2768;the number immediately following the designation indicates the
2、 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 The purpose of this fire-test-response standard is toevalu
3、ate the ability of a product to limit the surface spread offlame when evaluated for 30 min.This fire-test-responsestandard uses the apparatus and procedure of Test Method E84with the total test period extended to 30 min.1.2 Building applications affecting fire and life safety oftenrequire products w
4、ith specific criteria for surface spread offlame and flame spread index.The resulting performancecharacteristics included in the conditions of classification forthis fire-test-response standard are intended to be used forregulatory purposes to determine the suitability of materials orproducts for us
5、e in buildings under specified conditions wheresignificantly reduced surface burning characteristics are re-quired.1.3 Materials and products that are beyond the scope of TestMethod E84 are beyond the scope of this standard.1.4 Materials or products which melt,drip or delaminate tothe extent that th
6、e continuity of the flame front is destroyed arebeyond the scope of this standard.NOTE1Testing of materials that melt,drip,or delaminate to such adegree that the continuity of the flame-front is destroyed,results in lowflame spread indices that do not relate directly to indices obtained bytesting ma
7、terials that remain in place.Materials or products that melt,drip,or delaminate,or that cannot support their own weight,have the potentialfor demonstrating reduced flame spread results as compared to the flamespread results where the materials or products remain in place duringtesting.1.5 The values
8、 stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.6 The text of this standard references notes and footnotesthat provide explanatory information.The
9、se notes andfootnotes,excluding tables and figures,shall not be consideredas requirements of the standard.1.7 This standard is used to measure and describe theresponse of materials,products,or assemblies to heat andflame under controlled conditions,but does not by itselfincorporate all factors requi
10、red for fire hazard or fire riskassessment of the materials,products,or assemblies underactual fire conditions1.8 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,h
11、ealth,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.9 Fire testing is inherently hazardous.Adequate safe-guards for personnel and property shall be employed inconducting these tests.1.10 This international standard was developed in accor-dance
12、with internationally recognized principles 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:
13、2E84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE176 Terminology of Fire Standards2.2 ICC Codes3IBC International Building CodeIWUIC International Wildland Urban Interface CodeIRC International Residential Code2.3 NFPA Code4NFPA 101 Life Safety Code1This test method is under
14、 the jurisdiction of ASTM Committee E05 on FireStandards and is the direct responsibility of Subcommittee E05.22 on SurfaceBurning.Current edition approved Aug.1,2018.Published August 2018.Originallyapproved in 2011.Last previous edition approved in 2011 as E2768-11.DOI:10.1520/E2768-11R18.2For refe
15、renced 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.3ICC codes are available from International Code Council,4051 W.FlossmoorRd
16、.,Country Club Hills,IL 60478.4NFPA Codes are available from National Fire Protection Association,1Batterymarch Park,Quincy,MA,02269.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