1、Designation:E295717An American National StandardStandard Test Method forResistance to Wildfire Penetration of Eaves,Soffits andOther Projections1This standard is issued under the fixed designation E2957;the number immediately following the designation indicates the year oforiginal adoption or,in the
2、 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 This fire-test-response standard prescribes a method forqualitatively assessing the resistanc
3、e to fire penetration of eaveoverhangs and other projections,such as the soffits of roofeaves and cantilevered floor projections,when exposed todirect flame impingement from a simulated external wildfireexposure,such as encountered in a“Wildland Urban Interface”scenario.This test method provides dat
4、a suitable for comparingthe relative performance of materials,which are used as theexposed underside surfaces of eave overhangs and otherprojections.1.2 This test method measures the ability of eave overhangsand other projections to resist fire penetration from the exteriorinto the wall cavity or un
5、exposed side of the test specimenunder the conditions of exposure.1.3 This test method is applicable to eave overhangs andother projections such as the soffits of roof eaves and cantile-vered floor projections intended for use with either combustibleor noncombustible building envelopes.1.4 Limitatio
6、ns of the test method are listed in Section 5.1.5 The values stated in metric units are to be regarded asthe standard.Values in parentheses are for information only.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the u
7、ser of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.7 This standard is used to measure and describe theresponse of materials,products,or assemblies to heat andflame under controlled laboratory conditions
8、,but does not byitself incorporate all factors required for fire hazard or fire riskassessment of the materials,products or assemblies underactual fire conditions.1.8 Fire testing is inherently hazardous.Adequate safe-guards for personnel and property shall be employed inconducting these tests.1.9 T
9、he text of this standard references notes and footnoteswhich provide explanatory material.These notes and footnotes(including those in tables and figures)shall not be consideredas requirements of the standard.1.10 This international standard was developed in accor-dance with internationally recogniz
10、ed 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:2C1396 Specification for Gyps
11、um BoardD2898 Practice for Accelerated Weathering of Fire-Retardant-Treated Wood for Fire TestingD4442 Test Methods for Direct Moisture Content Measure-ment of Wood and Wood-Based MaterialsD4444 Test Method for Laboratory Standardization andCalibration of Hand-Held Moisture MetersD6662 Specification
12、 for Polyolefin-Based Plastic LumberDecking BoardsD7032 Specification for Establishing Performance Ratingsfor Wood-Plastic Composite and Plastic Lumber DeckBoards,Stair Treads,Guards,and HandrailsE176 Terminology of Fire StandardsE631 Terminology of Building ConstructionsE2707 Test Method for Determ
13、ining Fire Penetration ofExterior Wall Assemblies Using a Direct Flame Impinge-ment ExposureE2912 Test Method for Fire Test of Non-Mechanical FireDampers Used in Vented ConstructionE2886/E2886M Test Method for Evaluating the Ability ofExterior Vents to Resist the Entry of Embers and DirectFlame Impi
14、ngement1This test method is under the jurisdiction of ASTM Committee E05 on FireStandards and is the direct responsibility of Subcommittee E05.14 on External FireExposures.Current edition approved May 1,2017.Published May 2017.Originallyapproved in 2015.Last previous edition approved in 2015 as E295
15、7-15.DOI:10.1520/E2957-17.2For 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.Copyright ASTM International,100 Barr Ha
16、rbor 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 2.2 Other Standards:ISO 13943 Fire SafetyVocabulary3NFPA 286 Standard Methods of Fire Tests for EvaluatingContributi