【bs英國標(biāo)準(zhǔn)word原稿】bs en 1398 k levellers - safety requirements

BRITISHSTANDARD

BSEN1398:2009Docklevellers—SafetyrequirementsICS53.080NOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBYCOPYRIGHTLAWBSEN1398:2009NationalforewordThisBritishStandardistheUKimplementationofEN1398:2009.ItsupersedesBSEN1398:1998whichiswithdrawn.TheUKparticipationinitspreparationwasentrustedtoTechnicalCommitteeMHE/12,Liftingplatforms.Alistoforganizationsrepresentedonthiscommitteecanbeobtainedonrequesttoitssecretary.Thispublicationdoesnotpurporttoincludeallthenecessaryprovisionsofacontract.Usersareresponsibleforitscorrectapplication.CompliancewithaBritishStandardcannotconferimmunityfromlegalobligations.ThisBritishStandardwaspublishedundertheauthorityoftheStandardsPolicyandStrategyCommitteeon30April2009?BSI2009ISBN9780580545764

Amendments/corrigendaissuedsincepublicationDate CommentsNEE

NMarch2009ICS53.080 SupersedesEN1398:1997EnglishVersionDocklevellers-SafetyrequirementsRampesajustables-Prescriptionsdesécurité Ladebrücken-SicherheitsanforderungenThisEuropeanStandardwasapprovedbyCENon14February2009.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCENManagementCentreortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCENManagementCentrehasthesamestatusastheofficialversions.CENmembersarethenationalstandardsbodiesofAustria,Belgium,Bulgaria,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,ortugal,Romania,Slovakia,Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom.RPNCMMERSRCOMITéEUROPéENDENORMALISATIONEUROP?ISCHESKOMITEEFüRNORMUNGManagementCentre:AvenueMarnix17,B-1000Brussels?2009CEN AllrightsofexploitationinanyformandbyanymeansreservedworldwideforCENnationalMembers.

Ref.No.EN1398:2009:Es geForeword..............................................................................................................................................................4Intoduction........................................................................................................................................................51 Scope......................................................................................................................................................62 Normativereferences............................................................................................................................73 Termsanddefinitions..........................................................................................................................84 Listofsignificanthazards................................................................................................................105 Safetyrequirementsand/orprotectivemeasures...........................................................................125.1 Calculationsanddimensions...........................................................................................................125.2 Generalsafetyrequirementsandprotectivemeasures..................................................................165.3 dditionalrequirementsformanuallyoperateddocklevellers.....................................................195.4 dditionalrequirementsforpower-operateddocklevellers.........................................................206 Verificationofthesafetyrequirementsand/orthepotectivemeasures.....................................247 Informationforuse............................................................................................................................257.1 General.................................................................................................................................................257.2 Marking................................................................................................................................................257.3 Instructionsforuse............................................................................................................................257.4 Instructionsformaintenanceandinspection..................................................................................26nnexA(ifma)Examplesofsuitabletests........................................................................................28.1 General.................................................................................................................................................28.2 Stabilitytest.........................................................................................................................................28.3 Functiontestoftheautomaticsafetydevice..................................................................................30nnexZA(ifma)RelationshipbetweenthisuopeantandadandthessentialRequirementsofEUDirective98/37/EC...........................................................................................31nnexZB(ifma)RelationshipbetweenthisuopeantandadandthessentialRequirementsofEUDirective2006/42/EC.......................................................................................32Bibliography.....................................................................................................................................................33FiguesFigue1—Tpesofdocklevellers..................................................................................................................6Figure2—Mainpartsofadockleveller.........................................................................................................9Figure3—Positionofcontactareas...........................................................................................................14Figue4―Max.permanentdeformationofbridgedecksheets................................................................15Figure5—Safeguardingofcrushingandshearinghazards.....................................................................18Figure.1—Stabilitytestforloadcase1....................................................................................................29Figure.2—Stabilitytestforloadcase2....................................................................................................29Figue.3―Max.deformationofbidgedecksheets................................................................................29TablesTable1—Significanthazardsandsafetyrequirements..............................................................................11Table2—pplicablefactosandloadsatdifferentloadcombination....................................................13Table3—Meansofverificationofthesafetyrequirementsandmeasures..............................................24rwrdThisdocment(N1398:2009)hasbeenpreparedbyTechncalCommitteeCEN/TC98“Liftingpatforms”,thesecretariatofhichisheldbyDIN.ThisEuropeanStandardshallbegventhestatusofanationalstandard,eitherbypublicationofanidenticaltextorbyendorsement,atthelatestbySeptember2009,andconflctingnationalstandardsshalbewithdranatthelatestbySeptember2009.Attentionisdrawntothepossbilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrghts.CN[and/orCNELC]shalnotbeheldresponsbleforidentifinganyorallsuchpatentrghts.ThisdocumentsupersedesEN1398:1997.ThisdocumenthasbeenpreparedunderamandategiventoCNbytheEuropeanCommissonandtheEuropeanFreeTradeAssocation,andsupportsessentialrequirementsofECDirective(s).ForrelationshipwithECDrectie(s),seeinfomativeAnnexesZAandZ,whichareintegralpartsofthisdocument.AccordingtotheCEN/CENELCInternalRegulations,thenationalstandardsorganizatonsofthefollowingcountresareboundtoimplmentthisEuropeanStandard:Austra,Belgium,Bulgaria,Cprus,CechRepublic,Denmak,Estona,Finland,France,German,Greece,Hungar,Iceland,Ireand,Ital,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Nora,Poland,Portugal,Romania,Soakia,Soenia,Spain,Seden,SwitzerandandtheUnitedKngdom.IriThisEuropeanStandardisatpeC-standardasdefinedinENIO12100.Themachineryconcernedandtheextenttowhichhaards,hazardousstuationsandhazardouseventsarecoredreicadnescopefhsropenar.ndton,machryshllcomplyappropriateithENIO12100forhazardswhicharenotcoveredbythisEuropeanStandard.WereprovisionsofthistpeCstandardaredifferentfrmthosehicharestatedintpeAorBstandards,theprovisionsofthistpeCstandardtakeprecedenceoertheproisionsoftheotherstandards,formchinesthathavebeendesgnedandbuiltaccordingtotheproisionsofthistpeCstandard.1 Scope1.1 ThisEuropeanStandardspecifiesthesafetyrequirementsfordesign,construction,instalation,maintenanceandtestingofdocklevellersandforsafetycomponentsondocklevellers.Wththeexceptionof:)ckersformarendrcraftpcatos;)fngas;c)vehcemountedtaillfts.E1 equirmntsoriftngtblsareliddoninEN170.NE2 RequirmntsorehcemntedaillifsaeaiddoninN17561.1.2 Thsropnnrdsplcleockeerschresedbyperssnrmlpoerdrientransportequpment(e.g.forkfttrucks)astraffcpathsbeteengoodsehcles,bothroadvehcesandrailwagons,andpartsofbuildingssuchasloadingdocks.ThisstandarddoesnotdealwithotherbridgngdevicesnotshoninFgure1.a) Bridgeplate(dockplate)manuallyopeated,mobilec)Manuallyoperateddocklevelle,installedinapit,hingedlip

b)Manuallyorpoweroperateddockleveller,fixedatthedockedged)oweropeateddockleveller,installedinapit,telescopicorhingedlipFigue1—TpesofdocklevellersNE nlydockeelersfttedithadriesstmohertandictlyaplidhmanefortaemahiesntheseseoftheachneryirctie.1.3 ThisEuropeanStandardspecifiesrequirementsinordertoprotectpersonsandobjectsagainstaccdentsandhealthproblemsanddamageduringuseandoperationofdocklevelers.Personstoprotectare:a) operatorsandusers;) maigdspcngrsec) personsnearthedockleveler.Objectstobeprotectedare:) sndockers;e) transportequpmentondocklevelers.1.4 Tesfctardsfcklrsrestdnse4.TseaardsebnenfedbyrskassessmentaccordingtoENIO12100-2andrequireactionstoavoidthehaard,ortoreducethersk,whicharecoveredinClause5.1.5 Thesafetyrequirementsarebasedontheassumptionthatthedocklevelersareregularlymaintainedbycompetentpersonstotheinstructionsofthemanufacturerandthattheoperatingpersonhasbeenstructdnesefecker.1.6ThsrenardstappcbeodockelrshchremfcrdfrehedaefpubctnsN.1.7Thsrantdrddsihalsifcantazards,ardousstsdensreentdockLevelers,hentheyareusedasintendedandundertheconditionsforeseenbythemanufacturer(seeClause4).2 NormatiereferencesThefolloingreferenceddocumentsareindispensablefortheapplicationofthisdocument.Fordatedreferences,onlytheeditionctedapplies.Forundatedreferences,thelatesteditonofthereferenceddocument(ncludinganyamenments)applies.EN349,Safetyofmachinery—inimumgapstoavoidcrushingofpartsofthehumanbodyEN982,Safetyofmachinery—afetyrequrementsforfudpowersystemsandthercomponents—HydraulicsEN983,Safetyofmachinery—afetyrequrementsforfudpowersystemsandthercomponents—euacsEN60204-1:2006,Safetyofmachinery—Eectricalequipmentofmachines—Part1:Generalrequirements(IEC60204-1:2005,modifed)EN60529:1991,Degreesofprotectonprovidedbyencosures(IPcode)(IEC60529:1989)EN60947-4-1,Low-voltageswitchgearandcontrolgear—Part4-1:Contactorsandmotor-starters;Electromechanicalcontactorsandmotor-starters(IEC60947-4-1:2000)EN60947-4-2,Low-voltageswitchgearandcontrolgear—Part4-2:Contactorsandmotor-starters—ACsemiconductormotorcontrollersandstarters(IEC60947-4-2:1999)ENIO12100-1:2003,Safetyofmachinery—Bascconcepts,generalprinciplesfordesign—Part1:Bascterminology,methodology(ISO12100-1:2003)ENIO12100-2:2003,Safetyofmachinery—Basicconcepts,generalprinciplesfordesign—Part2:Teccalrincps(IO1-2:0ENIO13849-1:2008,afetyofmachnery—afetyreatedpartsofcontrolsystems—art1:Generalprincpesfordesign(ISO13849-1:2006)ENIO13850,Safetyofmachinery—Emergencystop—Principlesfordesign(ISO13850:2006)ISO11228-1,Ergonomics—anualhandling—Part1:LftingandcarryingISO11228-2,Ergonomics—anualhandling—Part2:PushingandpullingCNLCHD60364-4-41,Low-voltageeectricalinstallatons—Part4-41:Protectionforsafety—Protectonagainstelectricshock(IEC60364-4-41:2005,modifed)3 TermsandefinitionsForthepurposesofthisdocment,thetermsanddefinitionsgiveninENISO12100-1:2003andthefollowingappl.3.1docklevellerstcrmieeceobrehesceetenaoigckrsmrloadngreasadtheodsurfcefacechmayetdfferteeNOE1 ockleelersmaybebilts:a) manallyperaed,moiledkleeler,clledbrdgeplaerdokoard,seFiure1a);b) poeroperaedoklelleruiltintoaoaingdokorfiedattheegeofaok,eeiure1b)andd);c) manallyperaedokeelerbultntoaoadngdokoriedtothedgeofadck,seeFigue1b)andc).NE2 Dockleelersarepoiddforloaingandunoaingopeatonsandareotesgndtolitorloerlad.NE3 heliftngoroeringmchnimsonlypoidedtomealeraiosnteoitinoftheunoaeddkleelle.3.2dockboad/bidgeplatedockleveller,consistingofamanuallyoperatedplate,suspendedorloose3.3latcheddocklevellerckerchsedinacertanstnbyaosilygedlockgece3.4bidgedeckpartofthedocklevelerinthefomofaplatehichisusedastraffcpathforpersonsand/ortransportequipment,butexcudingthelp(seeFgure2)Key1 Bridgedek2 Bearer3 HingedlpFigue2—Mainpatsofadockleveller3.5bersupportingpartofadocklevellerintheformofabeam,fxedattheundersdeofthebridgedeck(seeFgure2)3.6suppotdevicertfadockelr,e..nheformfack,rrotchsuprsteckelrintheritstoredposition3.7hingedlippartofadocklevellerhingedtothebridgedeckandrestingonthevehceintheoperationalposton(seeFgure2)3.8telescopiclippartofadocklevellerhichcanbetelescopcallyextendedtowardsthevehceandhichrestsonthevehcenteortnalston3.9loadingadngrunldgahicesigackvel3.10feefloatingconditionmenchheckersupredntevecemayfoowtmclyhevertcalmomsthevehceduringtheloadingprocess3.11stoedpositionstnochteckelrspu,rochtrerns,hnadnghasfshed3.12automaticretunreturnccleofthedocklevellertoitsstoredpositionwithorthoutoperatorinitiation3.13installedfxedtoadockedgeorbuiltintotheloadingdockorasmilararea3.14automaticsafetydevicedevicewhichautomaticallypreventsanuncontrolledanddangerousloeringoftheloadeddockleveller3.15emergencystopdevicemanuallyoperateddevceintendedtostopallmovementsofadocklevelerintheeentofdanger3.16ratedloadweightofthegreatestmovingload(ncludnggoods,personsandtransportequipmentforgoods)forhichtheckerssied3.17competentpersonpersonwho,inaccordanceithhistrainngandexperience,hassuffcentknoledgeinthefedofdockelrsadssuffclyfmrihreentregulaonsoeletossessesafecdtnfckelrs3.18opeationalpositionstnfedockernchtsroddforldgdnading4 ListofsigniicantaardsThehaardsthatcaninfuencethesafetyofpersonsdurngoperation,maintenanceorinspectionhavebeenidentifedbytherskassesmentprocedureandthecorrespondingrequirementsformulated.Table1shosthehaardshichhavebeenidentifedandherethecorrespondingrequirementshavebeenformulatedinthisEuropeanStandard.Table1—Significanthazardsandsafetyrequirementsignificanthazadsafetyequirements;Relevantclausesinthisstandard1.1Crushinghazard5.2.9,5.2.10,,,,,,1.2Shearnghazard5.2.9,5.2.10,,,,,,1.6ImpacthaardHighpressurefuidejectionhazard,,,,2.1Contactofpersonsthliepart(directcontact),Contactofpersonsthpartswhichhavebecomeliveunderfaultyconditons(ndirectcontact)5.4.3,4Hazardsgeneratedbynoise5.2.68Hazadsgeneratedbyneglectingegonomicpinciplesinmachinedesign8.1Unhealthyposturesorexcessveeffort5.3.3,Inadequateconsiderationofhand-armorfoot-eganatomy5.3.3,tlvrodaddrl,stresstappcb8.6Humanerror,humanbehavour,duesg,catnrdtfconfmlcontro,,8.8Inadequatedesignorlocationofvsualsplayn10Unexpectedstart-up10.1Failure,malfunctionofcontrolsstem,,Restorationofenergysupplyafterannterruption,Otherexternalinfuencegravit,indetc.,5.2.511Impossbletostopthemachineinthebestst5.2.2,5.4.114Failureofthepowersupply,,18Lossofstabilty5.119Slip,tripandfallhaard5.2.2,5.2.3,5.2.4,5.2.5,5.2.6,5.2.7,5.2.8,5.2.11,5.3.2,5.4.15 Saetyrequiremensand/orproeciemeasurs5.1 Calculationsanddimnsions5.1.1 Generalcklrsslleesedostadaladsdforcsralprngndsttccionsaccordingtothescope.Docklevelershaveanadequatestrengthifwhentheloadsandforcesgivenin5.1.2areusedinthecalculationmethodsgivenin5.1.3thenecessarydesgncriteria/safetyfactorsof5.1.5areacheed.5.1.2 tuctualdesign GeneralDocklevellerswiderthan1,25mshall,inprincple,bedesignedtowithstandthepassageoffokliftandsmilarindustraltrucks.Atdthsupto1,25m,suchdocklevellersmaybedesgnedtoithstandloadsresultingfrmpedestriantraffcandpedestrianoperatedindustrialtrucksonl. Loadsandfoces.1 GeneralWncaclingckeersllreeatosdforcssdvedtormryandspmryldsandforcesshallbetakenintoaccount.rmryadsndforcsresfolos:a) deadloads;b) ratedloadpusdnamiceffects.Supplementaryloadsandforcesareconsideredtobe:c) windforces;d) brakingandstartingloads;e) inertaforces;f) mcts.ApplicableforcesandloadsatdfferentloadcombinationsareshowninTable2.Table2—pplicablefactosandloadsatdifferentloadcombinationsPrimaryloadsSafetygainstyildstrss(actorforcmbiedlods)*Safetygainstyildstrss(actorfornotcominedloas)*Suppleentaryloadspplicablefactosandloadsatdiffeentloadcombinationseadlods(fcto)Ratedlod(dyamicfactor)Inertiafores,actorutofservceindoadkN/m2)Impactloas(at1m)akingadstatiglods(acto)*laue5.1.525.1.5Normalopeatin,leellerinue,ornotinuse11,41,331,5–––0,3Crosstaffcperaio,leellerinstoedpostin11,41,331,5–––0,3Leellerinstoedpostin,noratdlad,indloadcanocur1–1,331,5–110Exceptinalituatin,emegecystop11111,4––0* Sftyfctritteildsss,3nimydlmtylsecmi,r,5ncmidl** Bkigdttiglsetgintffcicin.2 DeadloadsThemassesofallpermanentlyfxedandmovabecomponentsshallbetakenasdeadloads..3 RatedloadincludingdnamiceffectsInadditontotheratedloaddnamceffectsshallbeconsidered.TedmcffectsferadaduetosmoemtslbecacutdbymulngheratdadbythednamicfactorΦ=,.Thsadshl,endgontheihbofthedeckstructure,generalybeexpressedintermsof:a) pointloadforb≤1,25m;b) axleloadononeaxleforb>,5m.Pointloadsshallbetakenasactingoerasquarecontactarea.Axleloadsshallbetakenactingovertorectangularcontactareasat1mlateraldistance.Theseareasshallonlyapplyiftheactualconditionsdonotcalformoresereldn.Tesiefthefrintmm2]isderiedfromthewheelload[N]divdedby2[N/mm2].TheratiooftherectangularprintisW:L=3:2.ThepositionofthecontactareasisshowninFigure3.Key1 Centreocntre L Lenghofthecotactara2 irecionoftetrafic W WthofteontctareaFigue3—Positionofcontactareas.4 WindforcesDocklevelersexposedtotheenvronmentshallbedesignedtowithstandawindpressureofw=1,0kN/m2bothdrections,drectlyontothefrontofthedeckandasodrectlyontothebackofthedeck.Thisisrcurlyadforckershchrestoedinertcalpostnennotins.5 BrakingandstatingloadsThebrkingandstartngloadsfortransportequipmentoperationsshallbedeemedtobeeffectiveatthelevelofthebridgedeck.Theyshallbecalculatedat30%oftheratedload..6 InertiaforcesTheeffectsofinertiashallbetakenintoaccountforshock-inducingspeedchangesofmovablecomponents,inpartcularwhenadockevellertravesatoperationalspeedtothefnalendpostionineitherdirectionorwhentheautomaticsafetydevice(see5.4.1)isoperated..7 ImpactloadsForverticallystowedandlatcheddocklevelers,adrectlyappliedhoriontalloadof1kN/mfidtheenlydistrbutedonalneshallbedeemedtobeeffectiveatalocation1mabovethetopofthehingelineofthedocklevelerandatrghtanglestothebridgedeck.Fordocklevelersshorterthan1mthishoriontalloadshallbeappliedtothetopedgeoftheraiseddockleveler.Vehceimpactloadsneednotbeconsidered.NE hedefnedhoiontlloadasobecnsderd,oprenttedokleelerpltefrombengkokedorbypersnsorecancalhdligeuimet.5.1.3 Calculationofdocklevelles GeneralCalcuationsshalbeperformedinaccordancewithgenerallyacceptedrules.Tesrce,frlyccess,shalbestedncasefnyusalfomaercaclinmeds.Otherseformulaeshallbedevelopedsothattheymayeasilybeverfed. uppotingstuctures,genealfetynrmsfstresslerodbycacutonforlsuprngstructres.Tercpalmss,crsssects,marsdfastigmssllbestat.Teseverestniialrmryandsupplementaryloadratingsshallbegivenrespectvelyforeachmostunfavourableposition.Thehingedortelescopiclips,whennotsupportedonthevehice,neednotbecalculatedththeratedloadfortheoperationoftheautomaticsafetydevceortheemergencystopdevce.llssieodcasecombnisshaletakntocct.Adequatestrengthshallbeprovedbycalculationforcomponentsundercompresson. BridgedeckForcalculationpurposes,onlyonebearershallbetakenassupportingthepointloadortheaxleloadunlesslateraldstrbutionoftheloadisproen.Forthecalculationofthedeckplatesheetsonlytheratedloadithoutthednamcfactorshallbeused.Wreaotldrxeadllesurtdbyseralrrs,suchralstritnshalbedemonstratedfortheworstloadcase(e.g.loadingoftheendbearer).Non-stiffenedsheetsshalbecalculatedaccordingtotheplatetheor.Thepermanentdeformationofthesheetsshallbemax.3%ofthespana(seeFigure4).Keya WthofekpatesuporingsetinsFigue4―MaximumpermanentdefomationofbridgedecksheetsDistortionofbridgedecksccurrngunderoperatingconditons,e.g.byaforklifttruckoffsettoonesideshalbeconsidered.5.1.4 DesignTestAsanaternatietocalculations,componentsmaybesubjectedtotestingtodemonstratethersatsfactorydesign.Theratedloadmultipledbythednamcfactor(see.3)andthevalidsafetyfactor(see)slbepidoeffevetemostfrbesto.msnrbuckgshllaesafetyfactor2,0applied.Thereshallbenopermanentdeformation.Thetestsshallbeperfomedandcontrolledrespectivelybycompetentpersonsortestingorganisatons.5.1.5 Designciteria(factors) StabilityTestityfckelershnsjcdolsscfdin.2sllberoedbycacutn.Teffectoftherestoringforcesshallbe1,5tmestheeffctofthetippingforces. SafetyintermsofstressGeneralsafetyintermsofstressofthesteelshallbeproedbycalcuationbyapplingtheuniformsfetyfactorS=1,5againsttheieldstress.Othermateralsshallbedealtwithsmilarl.Intheloadcaseswhereprimaryandsupplementaryloadsarecombined,thesafetyfactorS=,3maybeused.Thisloadcaseisgivene.g.forfoklifttrucks,wheretheratedloadononeaxleonlyoccurshenthetruckisbrked. BucklingProofofadequateresstancetobucklingforcomonentssubjectedtocomressonshalbeobtainedinccorcehaidstnrsndudls. StressescausedbytheoperationoftheautomaticsafetydeviceForthisloadcasetheiedstressmaybeapplied(safetyfactor1,0)throughoutthefullcrosssectionaslongasthereisequilibrumbetweentheinternalandexternalforces.ProofofresstancetobuckngforcomponentssubjectedtocompressonmayinthiscasebedemonstratedbyapplingthesafetyfactorS=1,E Inthsoadcseeraneteforatinsccptale,prodedfilreofthestrctuedsnotocur.5.2 Generlsfetyrequirmentsandprteciemeasures5.2.1 GeneralDocklevelersshalcomplywiththesafetyrequirementsand/orprotectivemeasuresofthisclause.Inaddtion,cklrssllesndccordigoterncsfNIO100forrevttnotsgnfcnthazards,hicharenotdealtthbythisEuropeanStandard.Ifrmovabeguardsareusedthefxngsstemshallremaintotheguardsortothedocklevelerwhentheguardsareremoved.5.2.2 GadientsDocklevelersshallbesodesignedthatthemaxmumgradientofthepatforminitshighestandloestoperationalpositiondoesnotexceed12,5%(approximately7°).5.2.3 ntislippoperties(slipresistance)Theareasofdocklevelershichareusedbypersonsortransportequipmentshallhaveantisipproperte.Thesurfaceshouldbesodesgnedthatfudscanrunaa.NE1 Suitalentisippoperisaesuraesithpofiesoratisliptretmnt.5.2.4 Width tandadwidthThedocklevellershallbeamnmmf0,70mderthanthetrackdthofthetransportequipmentasspecifiedinthemanufacturer'sinstruction,butatleast1,25mwide.NE1 hisistomaeaalaleamnimmsaftyidthonachsdeofrasporteqiment.NE2 heidthofaoklellersouldcoresondtoteidthftheloaingsuraeofhelodingeile. Reducedwidthsnxctnemmumhf25mmayercdffactstteorr'srmssmkenecessaryandtheoperatortakesmeasurestopreentpersonsortransportequipmentfalling.Thismaybefufdf.g.a) transportequipmentisguidedontothedocklevellerandtheoperatingpersonnelcanuseanareainthemefeeerb) docklevelersareusedforaccesstodoorsinvehcesorbuildingshicharelessthan1,25minwidthandprecautionsaganstfallinghavebeentaken(e.g.thegapbetweenthedockandvehceislessthan0,20m).5.2.5 uppotinthestoredpositionDocklevellershichareattachedtorampedgesandfoldedupwardsintheunusedpostionshallbeequippedwithautomaticallyoperatingandpostivelyengagedmchanicaldevcestopreentthemfrmfallingdown,e.g.hooks,boltsorbars.Tsecsshalstadeodresultngfedadfedocklrntestredsito,thewindforceasgvenin.4andoftheimpactloadgivenin.7.Thedeviceshallbesodesgnedthatitcannotbedisengagedunintentionall.cklrschrentrednorffcrsslesosndhtheyformaelsurfcenhestoredpositionwiththerneighbouringsurfacesandshallbeautomaticallysupported.Inthestoredpostionthesameloadsasintheoperationpostionshallbeconsidered.5.2.6 TippinghazadsDocklevelersshallbedesignedsothattheydonotcauseatrippnghazardinthetraffcareaforloading.ckelrs,suprdntheldgsurfcefahc,shalaumacalyjsttoetchaes(freefoatingcondition)duringtheloadingoperation.Trgardstencklrsdhcleadngsurfcshchccurfehceldngsurfcesedangit