1、Designation:E2886/E2886M14An American National StandardStandard Test Method forEvaluating the Ability of Exterior Vents to Resist the Entryof Embers and Direct Flame Impingement1This standard is issued under the fixed designation E2886/E2886M;the number immediately following the designation indicate
2、s the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This fire-test-response standard prescribes two indi
3、-vidual methods to evaluate the ability of a gable end,crawlspace(foundation)and other vents that mount on a verticalwall or in the under-eave area to resist the entry through thevent opening of embers and flame.The ability of such vents tocompletely exclude entry of flames or embers is not evaluate
4、d.Roof ridge and off-ridge(field)vents are excluded from thisstandard.Acceptance criteria are not provided in this standard.NOTE1Test Method E2912 records information relevant to evaluatecompletely excluding the entry of flames through the venting device.1.2 Ember entry and flame penetration are eva
5、luated sepa-rately using different test procedures.A commentary andsummary of the development of the ember test apparatus aregiven in Appendix X1.1.3 These laboratory tests are used to evaluate the responseof vents when subjected to ember and flame exposures undercontrolled conditions.1.4 UnitsThe v
6、alues stated in either SI units or inch-pound units are to be regarded separately as standard.Thevalues stated in each system are not necessarily exact equiva-lents;therefore,each system shall be used independently of theother.Combining values from the two systems has the potentialto result in non-c
7、onformance with the standard.1.5 Unless otherwise specified,the tolerance for dimensionsin figures and text in this document shall be 65%.1.6 This test method does not address interior fire spread.1.7 The standard is used to measure and describe theresponse of materials,products or assemblies to hea
8、t and flameunder controlled conditions,but does not by itself incorporateall factors required for fire hazard or fire risk assessments ofthe materials,products or assemblies and other claddingmaterials under actual fire conditions.1.8 This standard does not purport to address all of thesafety concer
9、ns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.9 Fire testing is inherently hazardous.Adequate safe-guards for personnel and propert
10、y shall be employed inconducting these tests.2.Referenced Documents2.1 ASTM Standards:2D1929 Test Method for Determining Ignition Temperatureof PlasticsE108 Test Methods for Fire Tests of Roof CoveringsE176 Terminology of Fire StandardsE2257 Test Method for Room Fire Test of Wall and CeilingMaterial
11、s and AssembliesE2707 Test Method for Determining Fire Penetration ofExterior Wall Assemblies Using a Direct Flame Impinge-ment ExposureE2912 Test Method for Fire Test of Non-Mechanical FireDampers Used in Vented Construction2.2 Other Documents:3SFM 12-7A-1,Exterior Wall Siding and Sheathing,Califor
12、-nia Office of the State Fire Marshal,Sacramento,CASFM 12-7A-3,Under Eave,California Office of the StateFire Marshal,Sacramento,CA3.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod refer to Terminology E176,Test Method E108,andTest Method E2912.3.2 Definitions of Terms Spec
13、ific to This Standard:3.2.1 ember,nsmall burning or glowing pieces of vegeta-tion or other cellulosic-based material.3.2.2 flaming combustion,nignition of combustible mate-rial that results in flaming combustion.1This test method is under the jurisdiction of ASTM Committee E05 on FireStandards and i
14、s the direct responsibility of Subcommittee E05.14 on External FireExposures.Current edition approved May 1,2014.Published June 2014.DOI:10.1520/E2886_E2886M-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of AS
15、TMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Availablefrom:http:/osfm.fire.ca.gov/codedevelopment/wildfireprotectionbuildingconstruction.phpCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1
16、 3.2.3 smoldering combustion,nignition of combustiblematerial where a transition to flaming combustion does notoccur but a charred area indicating locations where emberslanded can be observed.3.2.4 sustained flaming,nexistence of flame on or overthe surface of the vent for continuous periods of at least 4 s.3.2.5 unexposed side,nthe face of the vent not directlyexposed to the fire in the Flame Intrusion Test.3.2.6 vent,na device or assembly placed in an exterioropening of a building(located in a