1、BRITISH STANDARD BS EN 527-3:2003 Office furniture Work tables and desks Part 3: Methods of test for the determination of the stability and the mechanical strength of the structure The European Standard EN 527-3:2003 has the status of a British Standard ICS 97.140 BS EN 527-3:2003 This British Stand
2、ard was published under the authority of the Standards Policy and Strategy Committee on 14 April 2003 BSI 14 April 2003 ISBN 0 580 41599 6 National foreword This British Standard is the official English language version of EN 527-3:2003. It supersedes BS 5459-1:1977 which is withdrawn. The UK partic
3、ipation in its preparation was entrusted to Technical Committee FW/3, Office furniture, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European
4、 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 Standards Online. This publication does not purport to include all t
5、he necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on t
6、he 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 cover, an inside front cover, the EN title page, pages 2 to 13 and a back cover. The
7、 BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN5273 February2003 ICS97.140 Englishversion OfficefurnitureWorktablesanddesksPart3:Methodsoftest forth
8、edeterminationofthestabilityandthemechanicalstrength ofthestructure MobilierdebureauTablesdetravaildebureauPartie3: Mthodesdessaipourladterminationdelastabilitetde larsistancemcaniquedelastructure BrombelBroArbeitstischeTeil3:Prfverfahrenfr dieBestimmungderStandsicherheitundder mechanischenFestigkei
9、tderKonstruktion ThisEuropeanStandardwasapprovedbyCENon18January2001. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnati
10、onal standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusast
11、he official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,SlovakRepublic,Spain,Sweden,Switzerland and UnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATIO
12、N COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN5273:2003EEN5273:2003(E) 2 Contents Foreword3 1 Scope 4 2 Normativereferences 4 3 Generaltes
13、tconditions . 4 3.1 Preliminarypreparation. 4 3.2 Determinationofthedrawertestload . 4 3.3 Tolerances 5 4 Testapparatus 5 4.1 Floorsurface . .5 4.2 Stops .5 4.3 Loadingpadfortheapplicationofverticalforces .5 4.4 Horizontalforceapplicationdevice . 5 4.5 Masses 5 5 Testmethods 5 5.1 Stability .5 5.1.1
14、 Purposeofthetest . .5 5.1.2 Testprocedure .6 5.2 Strengthunderverticalforce. .6 5.2.1 Purposeofthetest . .6 5.2.2 Testprocedure .6 5.3 Strengthunderhorizontalforce . 7 5.3.1 Purposeofthetest . .7 5.3.2 Testprocedure .7 5.4 Fatigueunderhorizontalforce .8 5.4.1 Purposeofthetest . .8 5.4.2 Testprocedu
15、re .8 5.5 Fatigueunderverticalforce 9 5.5.1 Purposeofthetest . .9 5.5.2 Testprocedure .9 5.6 Droptest . 10 5.6.1 Purposeofthetest . .10 5.6.2 Testprocedure .10 6 Testreport . .11 AnnexA (informative) Stiffnessofthestructure 12 A.1 Purposeofthetest . .12 A.2 Testprocedure .12EN5273:2003(E) 3 Foreword
16、 Thisdocument(EN5273:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC207“Furniture“,the secretariatofwhichisheldbyUNI. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyAugust2003,andconflictingnationalstandardsshallbewithdra
17、wnatthelatestby August2003. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,No
18、rway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN5273:2003(E) 4 1Scope ThispartofEN527specifiesmethodsoftestforthedeterminationofthestabilityandthemechanicalstrengthof thestructureofofficeworktablesanddesks. NOTE Inthisstandard,thewordstableanddeskhavethesamemeaning.Forsimplicit
19、y,onlythewordtableis usedintheremainderofthestandard. Thetestsaredesignedtobeappliedtoanarticleoffurniturethatisfullyassembledandreadyforuse. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropri
20、ateplacesinthetextandthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies. ISO48:1994, Rubber,vul
21、canizedorthermoplasticDeterminationofhardness(hardnessbetween10IRHDand 100IRHD). 3General test conditions 3.1 Preliminarypreparation Beforeanyofthetestsarecommenced,theitemshallbeoldenoughtoensurethatithasdevelopeditsfull strength. Thefurnitureshallbetestedasdelivered.Knockdownfurnitureshallbeassemb
22、ledaccordingtotheinstructions suppliedwithit.Ifthefurniturecanbeassembled,adjustedorcombinedindifferentways,themostadverse combinationshallbeusedforeachtest.Knockdownfittingsshallbetightenedbeforetestingandshallnotbere tightenedunlessspecificallyrequiredbythemanufacturer. Thetestsshallbecarriedoutin
23、indoorambientconditionsatatemperaturebetween15Cand25C. Thetestforcesindurabilityandstaticloadtestsshallbeappliedsufficientlyslowlytoensurethatnegligible dynamicloadisapplied.Theforcesinfatiguetestsshallbeappliedsufficientlyslowlytoensurethatkineticheating doesnotoccur. Theforcescanbereplacedbymasses
24、. 3.2 Determinationofthedrawertestload Thetestloadofdrawers,M,isdefinedbythefollowingformula: 5 2 300 50 330 , ) ( = h L l kg M . where: l(inmm)istheinternalwidth:usabledistancebetweenthesidesofthedrawer. L(inmm)istheinternallength:usabledistancebetweenthefrontandbackofthedrawer. h(inmm)istheclearhe
25、ight:unobstructedheightabovethebottomofthedrawer.EN5273:2003(E) 5 3.3Tolerances Unlessotherwisestated: allforcesshallhaveanaccuracyof5%ofthenominalforce; alldimensionsanaccuracyof1mmofthenominaldimension; allmassesanaccuracyof0,5%ofthenominalmass. Thetoleranceforthepositionofloadingpadsshallbe5mm. 4
26、 Testapparatus Unlessotherwisestated,thetestsmaybeappliedbyanysuitabledevicebecauseresultsaredependentonlyupon correctlyappliedforcesandloadsandnotupontheapparatus. 4.1 Floorsurface Horizontal,flatandrigidwithasmoothsurface.Forthedroptest(5.6),arubbermat(2 0,5)mmthick,with hardnessof85IRHD 10IRHDacc
27、ordingtoISO48ontopofaconcretefloor. 4.2Stops Topreventthearticlefromslidingbutnottilting,nohigherthan12mmexceptincaseswherethedesignofthe itemnecessitatestheuseofhigherstops,inwhichcasethelowestthatwillpreventtheitemfrommovingshallbe used. 4.3 Loadingpadfortheapplicationofverticalforces Arigidobject
28、withaflatsurface,100mmindiameter,witha12mmfrontedgeradius. 4.4 Horizontalforceapplicationdevice Adevice,capableofapplyingagraduallyincreasinghorizontalforce.Thedeviceshallbecapableofapplyingthe forceattherequiredangleofinclinationofthehorizontalandshallnothinderthefreemovementofthearticle. 4.5Masses
29、 Massesdesignedsothattheydonotreinforcethestructureorredistributetheload. 5Test methods 5.1Stability 5.1.1 Purposeofthetest Tochecktheabilityoftablestoresistforceswhichcancauseoverturningunderthefollowingconditions: Stabilityunderverticalload:todemonstrateadequateresistancetobeingoverturnedbypeopleu
30、singthe table. Stabilitywithdrawersopen:todemonstrateadequateresistancetooverturningwithdrawersfullyloaded andfullyopen.EN5273:2003(E) 6 5.1.2 Testprocedure Placethetableonthefloorsurface(4.1),innormalpositionofuse.Thereshallbenoadditionalloadsonthetopor inthedrawersexceptwhereotherwisestated(see5.1
31、.2.2). Allextracomponents,e.g.pullouttraysandflapsshallbeplacedinthepositionmostlikelytocauseoverturning buttheyshallnotbetakenintoaccountwhendeterminingtheloadingpositions. Heightadjustabletablesshallbesettotheirhighestposition,butnotmorethan800mmfromthefloortothetop surface. Levellingdevicesshallb
32、esetintheclosedposition. 5.1.2.1 Stabilityunderverticalload Apply,bymeansoftheloadingpad(4.3),averticalloadof750Natanyposition50mmfromtheedgeofthetable toplikelytocauseoverturning . Inthecaseofaslidingworksurface,carryoutthetestinthemostadversepositioninwhichtheworksurfacecan belockedandused. Record
33、whetherthetableoverturns. 5.1.2.2 Stabilitywithdrawersopen Whenthetableisequippedwithdrawersorfilesuspensionframes,loadeachdrawerwiththetestloadMspecified in3.2. Openthedrawersinaccordancewiththefollowinginstructions: a) Furniturewithdrawerswithoutinterlocks:Openalldrawersintheleastfavourablecombina
34、tion. b) Furniturewithdrawerswithinterlocks:Open,intheleastfavourablecombination,thelargestdrawerofeach pedestal,orthatwhichismostlikelytooverturnthetable. Thedrawersshallbeopenedasfarastheopenstopwillallowandaverticalloadof200Nshallbeappliedtothe centreofthefrontofthetable,50mmfromtheedge. Recordwh
35、etherthetableoverturns. 5.2 Strengthunderverticalforce 5.2.1 Purposeofthetest Tocheckthestrengthoftheworktopandofthestructureofthetable,underoccasionalverticalloadsofshort duration. 5.2.2 Testprocedure Placethetableonthefloorsurface(4.1),innormalpositionofuse. Levellingdevicesshallbeopened10mm. Load
36、alldrawerswiththetestloadMspecifiedin3.2.Closethedrawersandkeepthedrawersclosedthroughout thetest. Applytotheworksurface,bymeansoftheloadingpad(4.3),adownwardsverticalforceof1000N,10times.The forceapplicationshallbemaintainedfor10s 2s.EN5273:2003(E) 7 Carryoutthetestatthefourpointsshowninfigure1,ora
37、nywhereelseontheworksurfacethatisconsidered likelytocausefailure. Theforcesshallbeapplied50mmfromtheedges. Recordanydefects. Dimensionsinmillimetres Legend 1,2,3and4 Forceapplicationpoints Figure1Strengthunderverticalload 5.3 Strengthunderhorizontalforce 5.3.1 Purposeofthetest Tochecktheabilityofoff
38、icetablestowithstandhorizontalforcesappliedforexamplebyapersonpushingor pullingthetable. 5.3.2 Testprocedure Placethetableonthefloorsurface(4.1),innormalpositionofuse. Heightadjustabletablesshallbesettotheirhighestposition,butnotmorethan800mmfromthefloortothetop surface. Levellingdevicesshallbeopene
39、d10mm. Restrainthebase/legsofthetablebystops(4.2)placedononeshortside. LoadalldrawerswiththetestloadMspecifiedin3.2.Closethedrawersandkeepthedrawersclosedthroughout thetest. Applyaforceof450Nbymeansofthehorizontalforceapplicationdevice(4.4)horizontallyandalternatelyfrom thecentreoftheshortsides. One
40、applicationfromoneshortsideandonefromtheothershortsiderepresentonecycle. Carryout10cycles. Eachforceapplicationshallbemaintainedforatleast10s.EN5273:2003(E) 8 Ifthetabletendstooverturn,inclinethetestforcedownwardsgraduallyuntilthetableisjustpreventedfrom overturning. Ifthetableisnonsymmetricalwithre
41、gardstoitstransversecentreline,carryoutthetestfirstwiththestops positionedatoneendandthenrepeatwiththestopsattheoppositeend. Movethestopstoonelongside. Repeatthetestasdescribedabovewiththeforceof450Nappliedatthecentreofthelongsides. Recordanydefects. 5.4 Fatigueunderhorizontalforce 5.4.1 Purposeofth
42、etest Tocheckthedurabilityoftablesundersmallcyclicforces(openingandclosingofdrawers,carefulmovement, etc.),toensurethat,duringuse,theycanabsorbdisplacementswithoutasignificantdeformationofthetop. 5.4.2 Testprocedure Placethetableonthefloorsurface(4.1),innormalpositionofuse. Heightadjustabletablessha
43、llbesettotheirhighestposition,butnotmorethan800mmfromthefloortothetop surface. Levellingdevicesshallbeopened10mm. Blockthelegswithstops(4.2)inalldirectionsofforcestopreventthetablefromsliding. Loadthetabletopuniformlywithamassof100kgmax.topreventthetablefromoverturning.Themassorloads shallnotoverhangtheedgesandshallnotbecapableofmovingduringthetest. Wi
