saej386v002

SURFACEVEHICLESTANDARD(R)OperatorRestraintSystemforOff-RoadWorkMachinesSAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmaybereaffirmed,revised,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.Copyright©2006SAEInternationalAllrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmitted,inanyformorbyanymeans,electronic,mechanical,photocopying,recording,orotherwise,withoutthepriorwrittenpermissionofSAE.TOPLACEADOCUMENTORDER:Tel:877-606-7323(insideUSAandCanada)Tel:724-776-4970(outsideUSA)Fax:724-776-0790Email:custsvc@sae.orgSAEWEBADDRESS:http://www.sae.orgIssued1969-03Revised2006-02SupersedingJ386NOV1997®J386REV.FEB20061.ScopeThisSAEStandardestablishestheminimumperformancerequirementsforpelvicrestraintsystems(seatbelts,anchorages,andthefasteningelementsofseatbelts)necessarytorestrainanoperatororriderwithinaroll-overprotectivestructure(ROPS)intheeventofamachineroll-over,asdefinedinISO3471,ortip-overprotectionstructure(TOPS),intheeventofamachinetipoverasdefinedinISO12117.ThisSAEStandardappliestooff-road,self-propelledworkmachinesfittedwithROPSasspecifiedinISO3471,TOPSasspecifiedinISO12117andoperatorrestraint.1.1RationaleThisrevisionupdatesexternalreferenecestoindustryacceptedISOspecifications.Thedocumentwasreorganizedtomeetindustryrequest.Additionaldetailwasaddedtoincorporatethecurrentstateoftheartforrestraintsystems.Theuseofreferenceddocumentswasminimizedtoallowamorecomprehensivespecification.2.NormativeReferences2.1ApplicablePublicationsThefollowingstandardscontainprovisions,which,throughreferenceinthistext,constituteprovisionsofthisInternationalStandard.Atthetimeofpublicationtheeditionsindicatedwerevalid.AllstandardsaresubjecttorevisionandpartiestoagreementsbasedonthisInternationalStandardareencouragedtoinvestigatethepossibilityofapplyingthemostrecenteditionsofthestandardsindicatedbelow.MembersofIECandISOmaintainregistersofcurrentlyvalidInternationalStandards.SAEJ386RevisedFEB2006-2-2.1.1ISOPUBLICATIONSAvailablefromANSI,25West43rdStreet,NewYork,NY10036-8002,Tel:212-642-4900,www.ansi.org.ISO3411:1995—Earth-movingmachinery—HumanphysicaldimensionsofoperatorsandminimumoperatorspaceenvelopeISO3471:1994—Earth-movingmachineryROPS—Laboratorytestsandperformance—Amendment1:1997requirementsISO5353:1995—Earth-movingmachinery—SeatindexpointISO12117:1997—Earth-movingmachinery—Tip-overprotectionstructure(TOPS)forcompactexcavators—Laboratorytestsandperformancerequirements3.Definitions3.1AdjustmentHardwareHardwaredesignedforadjustingthebeltassemblytofittheuser,includingsuchhardwarethatmaybeintegralwithabuckle,attachmenthardware,orretractor.3.2SeatBeltAnchorageThepointwheretheseatbeltassemblyand/orextension(tether)beltismechanicallyattachedtotheseatsystemand/orthemachinestructure.3.3SeatAnchoragePartsofthemachinestructureatwhichtheseatsystemissecured.3.4AttachmentHardwarePartsoftheseatbeltassemblythatconsistsofthenecessarycomponentstosecuretheseatbeltassemblytotheseatbeltanchorage.3.5AttachingBoltsThreadedfastenersintheattachmenthardwareusedtosecuretheseatbeltassemblytotheseatbeltanchorage.3.6Strap(Webbing)Aflexiblebelttorestrainthebodyandfortransmissionoftheforcestotheattachmenthardware.3.7BodyBlockThetestdeviceusedtoapplytheseatbeltforcetotheseatsystem(referenceFigure2).3.8BuckleandLatchplateAquick-releaseconnectorwhichfastensthebeltassemblyintoaloop.SAEJ386RevisedFEB2006-3-3.9Micro-Slip(Creep)Theamountofunintentionallengtheningoftheseatbeltassemblyloopduringusethatiscausedbymotionofthemachine,theseat,andtheseatbeltedoccupant.3.10Extension(Tether)BeltAnystrap,belt,wirecable,solidlink,oretc.,thataidsthetransferofseatbeltforcesfromtheattachmenthardwareattheseattothemachinestructure.3.11HardwareAnymetalorrigidplasticpartoftheseatbeltassembly.3.12LoopCompleteseatbeltassembly,asitwouldbeinstalledaroundtheseatoccupant.3.13OperatorRestraintSystemTotalsystemcomposedoftheseatbeltassembly,seatsystem,anchorages,andextension(tether)belts,ifapplicable,whichtransferstheseatbeltforcetoamachine.3.14PolyesterYarnYarnsspunfrompolyethyleneterephthalate.3.15RetractorsDevicesforstoringallorpartofthestrapmaterialofaseatbeltassembly.3.16AutomaticLockingRetractor(ALR)Aretractorallowingextractionofthestraptothedesiredlengthandwhich,whenthebuckleisfastened,automaticallyadjuststhestraptothewearer.Furtherextractionofthestrapispreventedwithoutvoluntaryinterventionbythewearer.3.17EmergencyLockingRetractor(ELR)Aretractor,whichduringnormaldrivingconditionsdoesnotrestrictthefreedomofmovementbytheweareroftheseatbelt.Suchadevicehaslengthadjustingcomponentswhichautomaticallyadjustthestraptothewearerandalockingmechanismactuatedinanemergencyby:Decelerationorrolloverofthemachine(singlesensitivity),acombinationofmachinedeceleration,strappingaccelerationoranyotherlockingmeans(multiplesensitivity).3.18NonlockingRetractorAretractorfromwhichthestrapisextractedtoitsfulllengthbyasmallexternalforceandwhichprovidesnoadjustmentforthelengthoftheextractedstrapandnomeansforlockinganystrapnotextractedfromthemechanismatanytimeincludinganemergency.SAEJ386RevisedFEB2006-4-3.19RopingTendencyofapieceofmaterialtotwistuponitselforrolluptransversely,remainingintheformofaropeinsteadofstayinginitsoriginalstrapform.3.20SeatBeltAssembly(PelvicRetraint-Type1)(Belt,SeatBelt)Anystraporbeltdeviceacrossthelaporpelvicgirdleareadesignedtoprovideoperatorrestraintinamachine;includesbucklesorotherfeaturesandmayincludetheseatbeltattachmenthardware.3.21SeatIndexPoint(SIP)PointonthecentralverticalplaneoftheseatasdeterminedbytheSIP-devicewheninstalledintheoperatorsseatasdefinedinISO5353:1995.3.22SeatSystemTotalsupportmechanismprovidingtheinterfacebetweenmachineandoperatorintendedtoseatonemachineoperator;includes,ifprovided,theseatassembly,seatadjustmentmechanisms,seatsupportandtheseatsuspension.4.MachineRelatedRequirements4.1Anchorages4.1.1Seatbeltanchoragesshallpermittheseatbeltassemblytobereadilyinstalledorreplacedandshallcomplywiththestrengthrequirementsof4.4..4.1.2Iftheseatdoesnotswivelnorhasasuspensionsystem,theseatbeltassemblymaybeanchoredtotheseatortothemachineatanypointwithinthehatchedzonesshowninFigure1.ForSIPdefinition,seeISO5353.4.1.3Alternatively,theseatbeltassemblyshallbeattachedtoanchoragesontheseatnearthecornersoftheseatcushionwithinthehatchedzoneshowninFigure1,sothattheloopsizeoftheseatbeltassemblydoesnotchangeastheseatsuspensionoscillates.4.2Extension(Tether)Belts4.2.1Belts,cables,orsimilarflexibledevicesmaybeusedtotransfertheseatbeltassemblyforcesfromtheseatbeltanchoragestothemachine.Theextensionbeltlengthmaybeadjustable.4.2.2Extensionbeltsmustmeettheseatbeltassemblyforcerequirementsof4.4inalloperatingpositions.SAEJ386RevisedFEB2006-5-FIGURE1—LOCATIONOFSEATBELTANCHORAGEWITHRESPECTTOSEATINDEXPOINT4.3SeatBeltAssemblyInstallation4.3.1TheseatbeltassemblyshallbelocatedsuchthatwhentheseatbeltsareinastraightlinethroughtheSIP,theangleformedfromthehorizontalwillbeintherangeof60degrees±15degreesasshowninFigure1foralloperatingpositions.Wherepractical,thepreferredanglethroughtheSIPistowardthemorevertical.4.3.2Theseatbeltassemblyisintendedtoremaininthepelvicgirdleareaunderoperating,collision,androlloverconditions,therebyrestrainingtheoperator'shipsandlowertorsoareatotheseatassembly.SAEJ386RevisedFEB2006-6-4.3.3Seatbeltassembliesshouldbeinspectedbytheuserregularly.Replacetheseatbeltassemblyimmediatelyifdamagesuchaswornordamagedhardware,nickedorfrayedstrap,buckleorretractormalfunction,orloosestitchingisfound.4.4PerformanceRequirements4.4.1Theoperatorrestraintsystemshallbetestedon-machineorinamannerequivalenttoanon-machinecondition.4.4.2Theseatshallbeadjustedtotheoperatingposition,whichproducesthemostsevereloadingconditiontotheoperatorrestraintsystem,priortoanysubsequentstructuraldeflection.4.4.3Aftertheforceisappliedtotheoperatorrestraintsystem,theforceapplicationdeviceshallnotberepositionedtocompensateforanychangesthatmayoccurtotheforceapplicationangle.4.4.4TheseatbeltassemblyforceshallbeappliedusingabodyblocksimilartothatshowninFigure2.Ifaretractorisincludedintheassembly,referto5.4.FIGURE2—BODYBLOCK(DIMENSIONSINmm)4.4.5Formachineswithseatsystemshavingamassgreaterthan70kgsuchasthosethatincludeadd-oncontrolmodules,itisnecessarythattheseatsupportbedesignedtowithstandanadditionalforceoftentimesthemassoftheseatsystemwhichexceedsthe70kgmass.4.4.6Withthetestset-upfreeofslack,aforceof15000Nplus10times9.8N/kgmultipliedbyanymass(kg)oftheseatsystemgreaterthan70kgshallbeappliedtotheseatbeltassemblyintheforwardandupwarddirection.Theinitialangleofforceapplicationshallbe60degrees±15degreesfromthehorizontal,withthelineofforceapproximatelypassingthroughtheSIP.(FortheSIPdefinition,seeISO5353)(seeFigure3).Theforceshallbeattainedinnotmorethan30sandmaintainedfornotlessthan10s.Example:Ifaseatsystemhasa70kgmassbutan18kgseatmountedcontrolisaddedthentheforceis:15000N+(10)(9.8N/kg)(18kg)=16760N(Eq.1)SAEJ386RevisedFEB2006-7-FIGURE3—CONSTRUCTIONANDGENERALPURPOSEINDUSTRIALMACHINESTESTPROCEDURE4.4.7Theremustbenorupture,release,orotherfailureofanyelementintheoperatorrestraintsystem.Permanentdeformationofanyelementsshallnotconstitutefailure.5.RestraintSystemComponentRequirements5.1SeatBeltAssemblySpecifications5.1.1SINGLEOCCUPANCYAseatbeltassemblyshallbedesignedforusebyone,andonlyone,personatanytime.5.1.2RELEASETheseatbeltassemblyshallbeprovidedwithabuckleorlatchreadilyaccessibletotheoccupantanddesignedtoprovideeasyandrapidreleaseoftheassemblywithasinglemotion.Itshallalsobecapableofbeingreleasedwitheitherhand,bareormittened.Thebuckleshallbedesignedtominimizethepossibilityofaccidentalreleaseduetooperatormovement,inertia,orexternalforces.Thebuckleshallmeetalltherequirementsdescribedin5.3.5.1.3ADJUSTMENTHARDWARETheseatbeltshallbeself-adjustingorreadilyadjustablebyameanswithineasyreachoftheoccupant.Anyadjustmentoftheseatbeltshallbecapableofbeingmadewithmittenedhands.SAEJ386RevisedFEB2006-8-5.1.4STRAPThestraplengthshallbeadjustableforthe5thpercentiletothearcticclothed95thpercentileoperator.SeeISO3411.5.1.5MICRO-SLIPTwoseatbeltassembliesofthesamepartnumber,withadjustingdevicesincluded,shallbetestedinaccordancewiththerequirementsoutlinedbelow.Themicro-slipshallnotexceed25mmforeachadjustingdeviceintheassembly.Thesumofmicro-slipamountsforalladjustingdevicesinthebeltassemblyshallnotexceed40mm.5.1.5.1ConditionsTwoseatbeltassembliesofthesamepartnumbershallbeconditionedfor24hatatemperatureof20°C±5°Cand65%±5%relativehumidity.Thetestshallbeconductedatatemperaturebetween15°Cand30°C.ThetestapparatusshallconformtothatshowninFigure4.FIGURE4—MICRO-SLIPTESTAPPARATUS(DIMENSIONSINmm)SAEJ386RevisedFEB2006-9-5.1.5.2TestProcedureMountthebeltsasshowninFigure4forTest1andTest2.Applythefollowingprocedure:a.Applya5kgmasstothelowerendofeachbeltassembly;b.Applyareciprocatingmotion,totalamplitudeof300mm±20mmtothetopendofeachbeltassembly;c.Ifthereisafreeendservingasreservestrap,itshallnotbefastenedorclippedtothesectionsubjectedtothe5kgmass;d.Ensurethatonthetestbench,thestrapintheslackpositionmaintainscontactwiththefulllengthofthebodyblock;e.Guidethe5kgmassverticallyinamannertopreventswayingofthemassandtwistingofthebeltduringtest;f.Theattachmentshallbefixedtothe5kgmassasinthemachine;g.Beforestartoftest,complete20cyclesofthereciprocatingmotiontoremoveinitialslack;h.Marktheforce-bearingstrapmaterialateachadjusterinpreparationformeasuringcreep;i.Complete1000cyclesatafrequencyof0.5Hertzatthereciprocatingmotionof300mm±20mm.The5kgmassshallbeappliedonlyduringthetimecorrespondingtoashiftof100mm±12mmofeachhalfcycle.(RefertoFigure4.);j.Measurethedistancethestrapmaterialhasmovedateachadjustingdevice.5.1.6BREAKINGSTRENGTH5.1.6.1Thecompleteseatbeltassembly,includingstrapping,straps,buckles,adjustmentandattachmenthardware,andretractors,shallwithstandatensileforceofnotlessthan11.1kN,thatis,eachstructuralcomponentoftheassemblyshallwithstandaforceof11.1kNwhentestedbytheproceduresspecifiedin5.1.6.2.5.1.6.2Allcomponentsofthreeseatbeltassembliesshallbetestedasspecifiedin5.1.6.2.1and5.1.6.2.2.5.1.6.2.1Thepelvicrestraintbetweenseatbeltanchoragesshallbeadjustedtoalengthbetween914mmand1219mm,orasneartothislengthaspossibleifthedesignofthepelvicrestraintdoesnotpermititsadjustmenttothislength.Anautomaticlockingoremergencylockingretractor,whenincludedinaseatbeltassembly,shallbelockedatthestartofthetestwithatensioninthestrappingslightlyinexcessoftheretractileforceinordertokeeptheretractorlocked.Theattachmenthardwareshallbeorientedtothestrappingasspecifiedin5.1.6.2.2andillustratedinFigure5.Atensileforceof11.1kN±0.1kNshallbeappliedtothecomponentsinanyconvenientmannerandtheextensionbetweenanchoragesunderthisforceshallnotincreasemorethan500mm.Theforceshallbereducedandthebucklereleaseforceshallmeettherequirementsof5.3.6.SAEJ386RevisedFEB2006-10-FIGURE5—TENSILEFORCETESTINGMACHINE5.1.6.2.2Theattachmenthardwarefurnishedwiththeseatbeltassemblyshallbeattachedtotheanchoragebar.Theattachingbolt,withthelistedexceptions,shallbeparallel,oratanangleof45degreesor90degreestothestrapping,whicheverresultsinthegreatestanglebetweenstrappingandattachmenthardware.Eyeboltsshallbevertical,andattachingboltsofaseatbeltassemblydesignedforuseinspecificmodelsofmachinesshallbeinstalledtoproducethemaximumangleinuseindicatedbytheinstallationinstructions.5.1.7MARKING(LABELLING)Eachseatbeltassemblyortheindividualsectionsofanassemblyshallbepermanentlyandlegiblylabelledwithyearofmanufacture,modelorstylenumber,andnameortrademarkofmanufacturerorimporter,andshallstatecompliancewithSAEJ386.5.1.8USAGEANDMAINTENANCEINSTRUCTIONSSeatbeltassemblies,shallbeaccompaniedbywritteninstructionsfor:a.Properinstallation,includingthepropermannerofthreadingthestrapintotheattachmenthardwarewhenthreadablehardwareissupplied.b.Properwearingoftheinstalledassembly.c.Propermaintenance(includingcleaningprocedures)andperiodicinspectionforwearordamage(asdescribedin4.3.3).SAEJ386RevisedFEB2006-11-5.2StrapMaterialSpecifications5.2.1MATERIALThestrapmaterialshallhaveresistancetoabrasion,temperature,mildacids,alkalies,mildew,aging,moistureandsunlightequaltoorbetterthanthatofuntreatedpolyesterfiber.5.2.2STIFFNESSTominimizeroping,thestrapmaterialshallbewovenand/ortreatedtoproducestiffnessinthetransversedirection.Thestiffnessshallbeeffectivefortheusablelifeofthestrap.Thestrapshallbeflexibleinthelongitudinaldirectiontopermitadjustmentat–40°C.5.2.3COLORPreferredcolorsarethosewhicharerecommendedbythestrapmaterialmanufacturerasbeinglesssensitivetoultravioletrays.5.2.4WIDTHThestrapmaterialshallnotbelessthan46mminwidthwhenmeasuredunderano-forcecondition.5.2.5ENDSTheendsshallbeprotectedortreatedtopreventunraveling,andshallnotpulloutoftheadjustmenthardwareatmaximumsizeadjustment.5.2.6STRENGTHConditionthreespecimensforatleast24hinanatmospherehavingarelativehumiditybetween48%and67%andatemperatureof23°C±2°C.Afterconditioningthreespecimens,thenewmaterialshallhaveatensilebreakingstrengthofnotlessthan26.7kN.Thetestingmachineshallbeverifiedtohaveanerrorofnotmorethan1%intherangeofthetensilestrengthofthestrapmaterial.Thedistancebetweencentersofthegripsofthemachineatthestartofthetestshallbebetween100and250mm.Afterplacingthespecimeninthegrips,thestrapmaterialshallbestretchedcontinuouslyatauniformratetofailure.Therateofgripseparationshallbe50to100mm/min.Eachfailureforcevalueshallnotbelessthan26.7kNtensilebreakingstrengthrequirement.5.2.7ELONGATIONElongationshallnotexceed20%at11.1kNwhenmeasuredduringthetestforstrapmaterialbreakingstrengthasin5.2.6.SAEJ386RevisedFEB2006-12-5.2.8ABRASIONThestrapmaterialfromthreeseatbeltassembliesshallbetestedforresistancetoabrasionbyrubbingoverthehexagonbarprescribedinFigure6inthefollowingmanner.ThestrapmaterialshallbemountedinapparatusshownschematicallyinFigure6.Oneendofthestrapmaterial,A,shallbeattachedtoaweight,B,whichhasamassof2.3kg±0.05kg.Thestrapmaterialshallbepassedoverthenewabradingedgesofthehexagonbar,C,andtheoppositeendattachedtoanoscillatingdrum,D,whichhasastrokeof330mm.Suitableguidesshallbeusedtopreventmovementofthestrapmaterialalongtheaxisofthehexagonalbar,C.Thedrumshallbeoscillatedfor5000strokes(2500cycles)atarateof60strokes±2strokes(30cycles±1cycle)perminute.Themedianvalueforthebreakingstrengthdeterminedonthreeabradedspecimensshallbenotlessthan20kNtensilestrength.FIGURE6—ABRASIONTESTFORSTRAPMATERIAL(DIMENSIONSINmm)5.3BuckleSpecifications5.3.1BUCKLECOMPONENTSApplicablebucklecomponentsshallmeetthecorrosionrequirementsofAppendixAandshallmeetthetemperaturerequirementsofAppendixD.5.3.2BUCKLECOMPRESSION5.3.2.1Abuckleshallwithstandacompressiveforceof1780N±90Nappliedasprescribedbelow.Uponremovalofthecompressiveforce,itshallbeoperableandmeettheapplicablerequirementsof5.3.4andtherequirementsforreleaseeffortaftertensileforcein5.3.6.SAEJ386RevisedFEB2006-13-5.3.2.2Thebuckleshallbesubjectedtothespecifiedcompressiveforceappliedanywhereonthelongitudinalcenterlineofthebuckleandanywherealonglinesatapproximately60degreestothiscenterline,withthepointofintersectionoftheselinescenteredoverthereleasemechanism.Theforceshallbeappliedthroughacylindricalbar19mmindiameter,atleast100mmlong,andcurvedtoaradiusof150mm.Thebarshallbeplacedwiththelongitudinalcenterlineofthebardirectlyabovethelinesthroughthelongitudinalcenterlineofthebuckleandat60degreestoit(Figure7).5.3.2.3Thebuckleandlatchplateshallbeassembledandatensileforceof333N±22Nshallbeappliedtotheconnectedassemblyduringtheapplicationofthecompressiveforce.5.3.2.4Thelatchplateshallbedisengagedfromthebuckleandthecompressiveforceappliedtothebuckleagain.5.3.3BUCKLELATCHOPERATION5.3.3.1Thebuckle-latchplateassemblyofaseatbeltassemblywhentestedbytheprocedureasprescribedin5.3.3.2shallnotfail,gall,norweartoanextentthatnormallatchingandunlatchingisimpaired.Thebuckle-latchplateassemblyshallbeseparablebyaforceofnotmorethan22Nwhentestedaccordingtotheprocedurespecifiedin5.3.3.2.5.3.3.2Thebucklesfromthreeseatbeltassembliesshallbefullylatchedwiththeirlatchplatesandunlatchedatleast10times.Eachbuckleshallthen,withthelatchplatewithdrawnfromthebuckle,beclampedorfirmlyheldagainstasolidsurfacesoastopermitnormalmovementofbucklepartswithoutmovementofthebuckleassembly.Thereleasemechanismshallbemoved200timesthroughthemaximumpossibletravelagainstitsstopwithaforceof133N±13Nataratenottoexceed30cpm,actuatingthemechanisminamannerwhichsimulatesactualusage.Aftercompletionofthisportionofthetest,the133Nforceshallbereducedtoaforceofjustsufficientmagnitudetoassurefulltraveltothestopforanadditional10000cycles.Theperformanceofeachbuckleshallthenbeevaluatedwithrespectto5.3.3.1.5.3.4ADJUSTMENTFORCE5.3.4.1Thebuckleorothermanual-adjustingdevicenormallyusedtoadjustthelengthoftheassemblyshallbesubjectedtotheadjustmentforcetest.Thisforceshallnotexceed50Nwhenmeasuredbytheprocedurespecifiedin5.3.4.2.5.3.4.2Threebucklesorothermanualadjustingdevicesnormallyusedtoadjustthelengthoftheassemblyshallbetested.Thistestshallbeconductedwithin1hafterconditioningunderlaboratoryambientconditions.Withnoloadontheanchorend,thestrappingshallbedrawnthroughtheadjustingdeviceatarateof500mm±50mmperminute,andthemaximumforceshallbemeasuredtothenearest1Nafterthefirst25mmofstrappingmovement.Thestrappingshallbeprecycled10timespriortomeasurement.SAEJ386RevisedFEB2006-14-FIGURE7—BUCKLECOMPRESSION(DIMENSIONSINmm)5.3.5TILTLOCKADJUSTMENT5.3.5.1Bucklesorothermanualadjustmentdeviceshavingtiltlockadjustmentnormallyusedtoadjustthelengthoftheassemblyshalllockthestrappingwhentestedbytheprocedurespecifiedbelowatanangleofnotlessthan30degreesbetweenthebuckleandtheanchorstrapping.5.3.5.2Thistestshallbeconductedonbucklesorothermanualadjustingdevicesemployingatilt-lockfeaturetoadjustthelengthoftheassembly,us