1、BRITISH STANDARD BS EN 13446:2002 Wood-based panels Determination of withdrawal capacity of fasteners The European Standard EN 13446: 2002 has the status of a British Standard ICS 79.060.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 13446:2002 This British Standard,
2、having been prepared under the direction of the Building and Civil Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 1 July 2002 BSI 1 July 2002 ISBN 0 580 39976 1 National foreword This British Standard is the offic
3、ial English language version of EN 13446:2002. The UK participation in its preparation was entrusted to Technical Committee B/541, Wood-based Panels, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references T
4、he British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standa
5、rds Online. This publication does not purport to include all the necessary provisions of a contract. Users of this publication are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the
6、text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front
7、cover, an inside front cover, the EN title page, pages 2 to 10 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 CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENOR
8、M EN13446 May2002 ICS79.060.01 Englishversion WoodbasedpanelsDeterminationofwithdrawalcapacityof fasteners PanneauxbasedeboisDterminationdelacapacit larrachementdlmentsdefixation HolzwerkstoffeBestimmungdesHaltevermgensvon Verbindungsmitteln ThisEuropeanStandardwasapprovedbyCENon25March2002. CENmemb
9、ersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember
10、. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgiu
11、m,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brusse
12、ls 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN13446:2002EEN13446:2002(E) 2 Contents page Foreword3 1 Scope 4 2 Normativereferences 4 3 Termsanddefinitions. .4 4 Symbols 4 4.1 Fastenercharacteristic. .4 4.2 Testcharacteristics .4 5 Principle
13、5 6 Apparatus .5 6.1 Testingmachine. 5 6.2 Grip5 6.3 Testjig .5 6.4 Measuringinstrument .6 6.5 Conditioningequipment 6 7 Testpieces. .6 7.1 Sampling.6 7.2 Dimensions.7 7.3 Conditioning.7 7.4 Insertionoffasteners 7 8 Testprocedure .8 8.1 Thicknessanddensity . .8 8.2 Fastenerpenetration .8 8.3 Applica
14、tionofload. 8 8.4 Measurementofmaximumload . 8 9 Expressionofresult 8 10 Testreport 9 Bibliography 10EN13446:2002(E) 3 Foreword ThisdocumentEN13446:2002hasbeenpreparedbyTechnicalCommitteeCEN/TC112“Woodbasedpanels”, thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationa
15、lstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyNovember2002,andconflictingnationalstandardsshallbewithdrawnatthelatest byNovember2002. ThestandardispartlybasedEN1382. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesar
16、eboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain, Sweden,SwitzerlandandtheUnitedKingdom.EN13446:2002(E) 4 1Scope ThisEuropeanStandardspecifiesatestmethodfordeterminingth
17、ewithdrawalcapacityofnails,screwsand staplesinsertedintowoodbasedpanels. Thistestmethodcanbeusedforanycombinationoffastenertypeandwoodbasedpanelproduct. NOTE ThismethoddiffersfromEN320whichcharacterisesfibreboardsintermsoftheirresistancetothewithdrawalload ofonlyasingletypeofscrew. 2 Normativerefere
18、nces ThisEuropeanStandardincorporates,bydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean stand
19、ardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN323, WoodbasedpanelsDeterminationofdensity. EN325, WoodbasedpanelsDeterminationofdimensionsoftestpieces. EN1381, TimberstructuresTestmethodsLoadbearingstapl
20、edjoints. EN102301, SteelwirenailsPart1:Loosenailsforgeneralapplications . 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiveninEN1381relatingtostaplesand thosegiveninEN102301relatingtonailsandthefollowingapply. 3.1 withdrawalcapacity parametermeasuringtheresistanc
21、etowithdrawaloffastenersfromwoodbasedpanels 4Symbols 4.1 Fastenercharacteristic d nominaldiameteroffastener,inmillimetres forsquarenails disthesidedimension forroundnails disthediameter forgroovedandringshanknails d isthesmallestprojecteddiameter forscrews disthediametergivenbythemanufacturer forsta
22、ples disthesmallestdimensionofthecrosssection a staplewidth,inmillimetres. 4.2 Testcharacteristics l lengthoftestpiece,inmillimetres h heightoftestpiece,inmillimetresEN13446:2002(E) 5 t thicknessoftestpiece,inmillimetres F max maximumwithdrawalload,innewtons f withdrawalcapacity,innewtonspersquaremi
23、llimetre l p depthofpenetrationoffastener,inmillimetres 5Principle Thepanelsurfaceandpaneledgewithdrawalcapacitiesoffastenersaredeterminedbymeasuringtheforce requiredtowithdrawadefinedfastenerwithadefineddepthofpenetrationfromthetestpiece. 6Apparatus 6.1 Testingmachine Testingmachine,capableofapplyi
24、ngatensileforceatacontrolledrateofloadingtothefastenerbymeansofa gripandmeasuringtheforcetoatoleranceof1%ofthemaximumload. 6.2Grip Selfaligninggrip,incorporatingaballandsocketjoint. Inthecaseoftestingwithdrawalofstaples,thegripshallbeaswideaspossibleinordertopreventbendingofthe staple. 6.3 Testjig F
25、ortheconnectionofthetestpiecetothetestingmachine,ajigisnecessary(seeFigure1). Itcomprisesasupportwithacentralholeorslot,wheretheedgesofwhicharelocatedbetween5mmand10mm fromtheedgeofthefastener. Thejigshallbestiffenoughtoavoiddistortionduringtesting.EN13446:2002(E) 6 Dimensionsinmillimetres a)Panelsu
26、rfacewithdrawal Key 1B a l l 2G r i p 3 Support 4 Testpiece 5 Fixedtotestmachine b) Paneledgewithdrawal (frontview) c) Paneledgewithdrawal (sideview) Figure1Principleofatestjigforfastenerwithdrawal 6.4Measuring instrument Asuitableinstrumentcapableofmeasuringthethicknessofthetestpieceandthedepthofem
27、bedmenttoalimit deviationof 0,1mmaccordingtoEN325. 6.5Conditioning equipment Equipmentcapableofestablishingandmaintainingthefollowingclimates: (20 2) Cand(65 5)%relativehumidity; (20 2) Cand(85 5)%relativehumidity. 7 Testpieces 7.1Sampling Threesidematchedtestpiecesshallberemovedfromsixlocationsfrom
28、apanel.Eachofthesidematchedtest piecesshallbeusedtodeterminethedensityandthewithdrawalcapacityofthefastenerinthesurfaceorinthe edgepercondition(see7.3).EN13446:2002(E) 7 7.2Dimensions Thedimensionofthetestpiecesshallbe50mm 50mm thickness, t,ordefinedbytheuser. 7.3Conditioning Priortotheinsertionofth
29、efastener,testpiecesshallbeconditionedatanequilibriummoisturecontentcorres pondingtotheappropriateconditionsofuse. Fordryconditionsthetestpiecesshallbeconditionedtoconstantmassatatemperatureof(20 2) Canda relativehumidityof(65 5)%priortoinsertionofthefastenersandtesting. Forhumidconditionsthetestpie
30、cesshallbeconditionedtoconstantmassatatemperatureof(20 2) Canda relativehumidityof(85 5)%.Afterinsertionofthefastenersat85%relativehumidity,thetestpiecesshallbe reconditionedtoconstantmassatatemperatureof(20 2) andarelativehumidityof(65 5)%. Constantmassisconsideredtobereachedwhentheresultsoftwosucc
31、essiveweighingoperations,carriedoutat anintervalof24h,donotdifferbymorethan0,1%ofthemassofthetestpiece. Forcertaininvestigationsothermoisturecontentscanbeappropriate.Theseshallbereported. 7.4 Insertionoffasteners 7.4.1General Unlessotherwisespecified,theinsertionoffastenersshallbecarriedoutaccording
32、tothemanufacturers recommendations.Theaxisofthefastenersshallbeperpendiculartothepanelsurfaceorpaneledge. 7.4.2 Edgewithdrawal ThetestpiecesshallcomplywithFigure2.Thefastenersshallbeinserted,unlessotherwisespecified,intothe paneledgetoapenetrationof8 d,uptoaspacemaximumof30mmandshallbepositionedassh
33、owninFigure2. NOTE Inpanelswithahighdegreeofanisotropy(e.g.Plywood,OSBandLVL)theedgewithdrawalcapacitycanvarywith paneldirectionandtheorientationofthetestededgeshouldberecorded. a)Nailorscrew b)Staple Figure2EdgewithdrawalcapacityEN13446:2002(E) 8 7.4.3Surface withdrawal Thetestpiecesshallcomplywith
34、figure 3.Thefastenersshallbeinserted,unlessotherwisespecified,toa penetrationof8 dorthefullthicknessofthetestpiece(whichevertheshorter)andshallbepositionedasshownin figure3. a)Nailorscrew b)Staple Figure3Surfacewithdrawalcapacity 8 Testprocedure 8.1 Thicknessanddensity Determinethethicknessofthetest
35、piecetothenearest0,1mminaccordancewithEN325andthedensityin accordancewithEN323. 8.2 Fastenerpenetration Determinethedepthofthefastenerpenetration l p tothenearest0,1mmandrecordtheresult. 8.3 Applicationofload Placethetestpieceinthetestjig,ensuringtheapplicationofthewithdrawalforceisalongtheaxisofthe
36、fastener orthattheaxisofthestaplelegsareparalleltothetensionforce. Theloadshallbeappliedataconstantrateofcrossheadmovementthroughoutthetest. Therateofcrossheadmovementshallbeadjustedsothatthemaximumloadisreachedwithin(6030)s. 8.4 Measurementofmaximumload Measurethemaximumloadwithatoleranceof1%andrec
37、ordtheresult. 9 Expressionofresult Thewithdrawalparameter f shallbedeterminedinNewtonspersquaremillimetrefromtheequations: p l d F f = max fornailsorscrews (1)EN13446:2002(E) 9 p l d F f = 2 max forstaples (2) Ifthefastenerspenetratethepanelthickness, l p isthepanelthickness. 10 Testreport Thetestre
38、portshallcontainthefollowinginformation: a) referencetothisstandard; b)sampling procedure; c) specificationofthewoodbasedpanel; d) dimensionsanddensityofthetestpieces; e) conditioningor,ifnecessary,moisturecontent; f) numberoftestpiecesused; g) specificationandnumberoffastenerstested(type,sizes,mate
39、rial,surfacecoatingorconditionandother particulars); h) methodofinsertionoffastener; i) individualtestresults,meanvaluesandstandarddeviationof f, l p , F max ,timetoreachthemaximumload F max , descriptionofthemodeoffailure.EN13446:2002(E) 10 Bibliography 1 EN320, FibreboardsDeterminationofresistance
40、toaxialwithdrawalofscrews. 2 EN1382, TimberstructuresTestmethodsWithdrawalcapacityoftimberfasteners.blankBS EN 13446:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK vi
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