1、DRAFT FOR DEVELOPMENT DD ENV 13381-7:2002 Test methods for determining the contribution to the fire resistance of structural members Part 7: Applied protection to timber members ICS 13.220.50 DD ENV 13381-7:2002 This Draft for Development, having been prepared under the direction of the Health and E
2、nvironment Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 2 August 2002 BSI 2 August 2002 ISBN 0 580 40158 8 National foreword T h i s D r a f t f o r D e v e l o p m e n t i s t h e o f f i c i a l E n g l i s h l a n g u a
3、g e v e r s i o n o f ENV 13381-7:2002. This publication is not to be regarded as a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature because of insufficient experience in this area. It should be applied on this provisional basis,
4、 so that information and experience of its practical application may be obtained. Comments arising from the use if this Draft for Development are requested so that UK experience can be reported to the European organization responsible for its conversion into a European Standard. A review of this pub
5、lication will be initiated 2 years after its publication by the European organization so that a decision can be taken on its status at the end of its three-year life. The commencement of the review period will be notified by an announcement in Update Standards. According to the replies received by t
6、he end of the review period, the responsible BSI Committee will decide whether to support the conversion into a European Standard, to extend the life of the prestandard or to withdraw it. Comments should be sent in writing to the Secretary of BSI Subcommittee FSH/22/12, Test procedures for protectio
7、n systems, at 389 Chiswick High Road, London W4 4AL, giving the document reference and clause number and proposing, where possible, an appropriate revision of the text. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Sta
8、ndards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. Summary of page
9、s This document comprises a front cover, an inside front cover, the ENV title page, pages 2 to 34, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANP
10、RESTANDARD PRNORMEEUROPENNE EUROPISCHEVORNORM ENV133817 July2002 ICS13.220.50 Englishversion Testmethodsfordeterminingthecontributiontothefire resistanceofstructuralmembersPart7:Appliedprotectionto timbermembers ThisEuropeanPrestandard(ENV)wasapprovedbyCENon1March2002asaprospectivestandardforprovisi
11、onalapplication. TheperiodofvalidityofthisENVislimitedinitiallytothreeyears.AftertwoyearsthemembersofCENwillberequestedto submittheir comments,particularlyonthequestionwhethertheENVcanbeconvertedintoaEuropeanStandard. CENmembersarerequiredtoannouncetheexistenceofthisENVinthesamewayasforanENandtomake
12、theENVavailablepromp tly atnationallevelinanappropriateform.Itispermissibletokeepconflictingnationalstandardsinforce(inparalleltothe ENV)untilthefinal decisionaboutthepossibleconversionoftheENVintoanENisreached. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,F
13、rance,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitatio
14、ninanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENV133817:2002EENV133817:2002(E) 2 Contents page Foreword. 3 1 Scope 4 2 Normativereferences5 3 Termsanddefinitions,symbolsandunits 5 4 Testequipment . 7 5 Testconditions. . 7 6 Testspecimens 8 7 Installationofthetestconstruction
15、 12 8 Conditioningofthetestconstruction 12 9 Applicationofinstrumentation. 13 10 Testprocedure . . 14 11 Testresults. . 15 12 Testreport . 16 13 Assessment . 16 14 Reportoftheassessment 18 15 Limitsofapplicabilityoftheresultsoftheassessment 18 AnnexA(normative)Testmethodtothesmoulderingfireorslowhe
16、atingcurve. 23 AnnexB(informative)Guidelinesforfireprotectionoftimberstructuresaccordingto ENV199512Loadbearingfunction. 26 AnnexC(normative)Measurementofpropertiesoffireprotectionmaterials . 29 AnnexD(informative)Alternativeconstructionforloadedbeamtestspecimen . 32 Bibliography . 34ENV133817:2002(
17、E) 3 Foreword ThisdocumentENV133817:2002hasbeenpreparedbyTechnicalCommitteeCEN/TC127“Firesafetyinbuildings“,the secretariatofwhichisheldbyBSI. ThisdocumenthasbeenpreparedunderthemandategiventoCEN/TC127bytheCommissionandtheEuropeanFreeTrade Association. Astherewaslittleexperienceincarryingoutthesetes
18、tsinEuropeCEN/TC127agreedthatmoreexperienceshouldbebuilt upduringaprestandardizationperiodbeforeagreeingtextasEuropeanStandards.Consequentlyallpartsarebeingprepared asEuropeanPrestandards. ThisEuropeanPrestandardisoneofaseriesofstandardsforevaluatingthecontributiontothefireresistanceofstructural mem
19、bersbyappliedfireprotectionmaterials.OtherpartsofthisENVare: Part1: Horizontalprotectivemembranes. Part2: Verticalprotectivemembranes. Part3: Appliedprotectiontoconcretemembers. Part4: Appliedprotectiontosteelmembers. Part5: Appliedprotectiontoconcrete/profiledsheetsteelcompositemembers. Part6: Appl
20、iedprotectiontoconcretefilledhollowsteelcolumns. AnnexesAandCarenormative.AnnexesBandDareinformative. Caution Theattentionofallpersonsconcernedwithmanagingandcarryingoutthisfireresistancetest,isdrawntofactthatfiretes ting canbehazardousandthatthereisapossibilitythattoxicand/orharmfulsmokeandgasescan
21、beevolvedduringthetest. Mechanicalandoperationalhazardscanalsoariseduringtheconstructionoftestelementsorstructures,theirtestingandthe disposaloftestresidues. Anassessmentofallpotentialhazardsandriskstohealthshouldbemadeandsafetyprecautionsshouldbeidentifiedand provided.Writtensafetyinstructionsshoul
22、dbeissued.Appropriatetrainingshouldbegiventorelevantpersonnel.Laboratory personnelshouldensurethattheyfollowwrittensafetyinstructionsatalltimes. Thespecifichealthandsafetyinstructionscontainedwithinthisprestandardshouldbefollowed. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorga
23、nizationsofthefollowingcountriesare boundtoannouncethisEuropeanPrestandard:Austria,Belgium,CzechRepublic,Denmark,Finland,France,Germany, Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,Switzerlandandthe UnitedKingdom.ENV133817:2002(E) 4 1S c o p e ThisPartofthi
24、sEuropeanPrestandardspecifiesatestmethodtobefollowedfordeterminingthecontributionof fireprotectionsystemstothefireresistanceofstructuraltimbermembers. Suchfireprotectionsystemsincludecladdings,sprayedfireprotectionandcoatings. Themethodisapplicabletoallfireprotectionsystemsusedfortheprotectionoftimb
25、ermembers.Thesecanbefixed directly,totallyorinpart,tothetimbermemberandcanincludeanairgapbetweenthefireprotectionsystemand thetimbermember,asanintegralpartofitsdesign. EvaluationoftimberconstructionsprotectedbyhorizontalorverticalprotectivemembranesarethesubjectofENV 133811orENV133812respectively. T
26、hetestmethodisapplicabletothedeterminationofthecontributionoffireprotectionsystemstothefireresistance ofloadbearingtimberstructuralmembersandnonloadbearingpartsoftheworks,includingfloors,roofs,walls, beamsandcolumns.Itisalsoapplicabletotimberstructuralmembersincorporatinginsulatingmaterialsbetween t
27、hetimbermembers,e.g.betweentimberjoistsinfloorconstructions. Thetestmethodanditsassessmentprocedureisdesignedtopermitdirectapplicationoftheresultstocoverarange ofthicknessesoftheappliedfireprotectionmaterial. ThisEuropeanPrestandardcontainsthefiretest whichspecifiesthetesttobecarriedouttodetermineth
28、eability ofthefireprotectionsystemtodelaythetemperaturerisethroughoutthetimbermember,todeterminetheability ofthefireprotectionsystemtoremaincoherentandfixedtothetimbermemberandtoprovidedataofthe temperatureprofilethroughoutthetimbertestmember,whenexposedtothestandardtemperature/timecurve accordingto
29、theproceduresdefinedherein. Inspecialcircumstances,wherespecifiedinnationalbuildingregulations,therecanbeaneedtosubjectreactive protectionmaterialtoasmoulderingcurve.Thetestforthisandthespecialcircumstancesforitsusearedetailed inannexA. Thefiretestmethodologymakesprovisionforthecollectionandpresenta
30、tionofdatawhichcanbeusedasdirect inputtothecalculationoffireresistanceoftimbermembersinaccordancewiththeproceduresgivenin ENV199512. Adescriptionoftherelationshipofthistestmethodandtheassessmentoftheresultsobtainedtherefromto ENV199512andguidelinesfortheuseofthistestmethodinaccordancewiththatstandar
31、daregiveninannexB. ThisEuropeanPrestandardalsocontainstheassessmentwhichprescribeshowtheanalysisofthetestdatashould bemadeandgivesguidancetotheproceduresbywhichinterpolationshouldbeundertaken. Thelimitsofapplicabilityoftheresultsoftheassessment arisingfromthefiretestaredefined,togetherwith permitted
32、directapplicationoftheresultstodifferenttimberconstructionsovertherangeofthicknessesofthe appliedfireprotectionsystemtested.ENV133817:2002(E) 5 2 Normativereferences ThisEuropeanPrestandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheapp
33、ropriateplacesinthetext,andthepublicationsarelistedhereafter.Fordated references,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropeanPrestandard onlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthepublication referredtoapplies(includingamend
34、ments). EN13631 FireresistancetestsPart1:Generalrequirements. EN13632 FireresistancetestsPart2:Alternativeandadditionalprocedures. EN13651 FireresistancetestsforloadbearingelementsPart1:Walls. EN13652 FireresistancetestsforloadbearingelementsPart2:Floorsandroofs. EN13653 Fireresistancetestsforloadbe
35、aringelementsPart3:Beams. EN13654 FireresistancetestsforloadbearingelementsPart4:Columns. ENV199512 Eurocode5:Designoftimberstructures Part12:GeneralrulesStructuralfiredesign. EN338 StructuraltimberStrengthclasses. EN312 ParticleboardsSpecifications. ISO84212 FireprotectionVocabularyPart2:Structural
36、fireprotection. ISO13943 FiresafetyVocabulary(ISO13943:1999). 3 Termsanddefinitions,symbolsandunits 3.1 Termsanddefinitions ForthepurposesofthisEuropeanPrestandard,thetermsanddefinitionsgiveninEN13631,ENISO13943andISO84212, togetherwiththefollowing,apply. 3.1.1 timberstructuralmember elementofbuildi
37、ngconstructionwhichmaybeloadbearingornonloadbearingandwhichismainlyconstructedfromsolid timberand/orotherwoodbasedproducts 3.1.2 fireprotectionmaterial materialorcombinationofmaterialsappliedtothesurfaceofatimberstructuralmemberforthepurposeofincreasingitsfir e resistance 3.1.3 passivefireprotection
38、materials materials whichdonotchangetheirphysicalformuponheating,providefireprotectionbyvirtueoftheirphysicalorthermal properties.Theymayincludematerialscontainingwaterwhich,onheating,isremovedtoproducecoolingeffects 3.1.4 reactivefireprotectionmaterials materialswhicharespecificallyformulatedtoprov
39、ideachemicalreactionuponheatingsuchthattheirphysicalformchanges andinsodoingprovidefireprotectionbythermalinsulativeandcoolingeffectsENV133817:2002(E) 6 3.1.5 fireprotectionsystem fireprotectionmaterialtogetherwithaprescribedmethodofattachmenttoatimberstructuralmember.Thefireprotection systemmayincl
40、udemultiplelayersofmaterialsandmultiplecombinationsofmaterials 3.1.6 fireprotection protectionaffordedtothetimbermemberbythefireprotectionsystemsuchthattheriseoftemperatureofthetimberand fixingsislimitedordelayedthroughouttheperiodofexposuretofire 3.1.7 testspecimen completeassemblyofthetimbertestme
41、mberplusthefireprotectionsystemundertest.Withinthistestmethod,severaltimber beamsrepresentativeoftimberinvariousconstructionalenvironmentsinastructuralbuildingmember,maybecombinedinto asingletestspecimen 3.1.8 stickability abilityofafireprotectionmaterialtoremainsufficientlycoherentandinpositionfora
42、welldefinedrangeofdeformations, andfurnaceandtestspecimensurfacetemperatures,suchthatitsabilitytoprovidefireprotectionisnotsignificantlyimpai red 3.1.9 charringdepth distancefromtheoriginalsurfaceofthetimbermembertothecharline.Thecharlineistheborderlinebetweencharlayer andtheresidualcrosssection 3.2
43、 Symbolsandunits Symbol UnitDesignation. t min Time. t pr min Thefailuretimeofthefireprotectionsystem,i.e.thetimewhenthetemperature onthesurfaceofthetimbertestmember(interfacebetweentimberandfire protectionorairgapbeneaththefireprotection)reaches300 C. t 300,prot min Timeatwhichthetemperatureindicat
44、edbyathermocoupleplacedatthe interfacebetweenthetimbertestmemberandthefireprotectionsystem,orat aspecifiedpointwithinaprotectedtimbertestmember,reaches300 C. t 300,unprot min Timeatwhichthetemperatureindicatedbyathermocoupleonthesurfaceof anunprotectedtimbertestmember,orataspecifiedpointwithinan unprotectedtimbertestmember,reaches
