1、Designation:E295715An 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.2.Referenced Documents2.1 ASTM Standards:2C1396 Specification for Gypsum BoardD2898 Practic
10、e 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 for Polyolefin-Based
11、 Plastic LumberDecking BoardsD7032 Specification for Establishing Performance Ratingsfor Wood-Plastic Composite Deck Boards and GuardrailSystems(Guards or Handrails)E176 Terminology of Fire StandardsE631 Terminology of Building ConstructionsE2707 Test Method for Determining Fire Penetration ofExteri
12、or 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 Impingement2.2 Other Standards:ISO
13、13943 Fire SafetyVocabulary3NFPA 286 Standard Methods of Fire Tests for EvaluatingContribution of Wall and Ceiling Interior Finish to RoomFire Growth41This test method is under the jurisdiction of ASTM Committee E05 on FireStandards and is the direct responsibility of Subcommittee E05.14 on External
14、 FireExposures.Current edition approved July 1,2015.Published August 2015.DOI:10.1520/E2957-152For 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 Summ
15、ary page onthe ASTM website.3Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,CP 56,CH-1211 Geneva 20,Switzerland,http:/www.iso.org.4Available from National Fire Protection Association(NFPA),1 BatterymarchPark,Quincy,MA 02169-7471,http:/www.nfpa.org.Copyright
16、ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.Terminology3.1 DefinitionsFor definitions of terms used in thisstandard,see Terminology E176,E631 and ISO 13943.In caseof conflict between E176 and E631 or ISO 13943,thedefinitions given in Terminology E176 shall prevail.In case ofconflict between E631 and ISO 13943,the definitions given inTerminology E631 shall prevail.3.2 Definitions of Terms Specific to This Standard:3.2.1 building envelope,n