BS634982007MaritimestructuresPart8Codeofpracticefo

BS6349-8:2007Maritimestructures–Part8:CodeofpracticeforthedesignofRo-Roramps,linkspansandwalkwaysICS47.020.99;93.140NOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBYCOPYRIGHTLAWBRITISHSTANDARD©BSI2007ISBN9780580502033ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferenceB/525/11Draftforcomment06/30124387DCPublicationhistoryFirstpublishedApril2007AmendmentsissuedsincepublicationAmd.no.DateTextaffectedBS6349-8:2007©BSI2007•iBS6349-8:2007ContentsForewordiii0Introduction11Scope32Normativereferences43Terms,definitionsandsymbols54Generalrecommendations105Typesofstructure166Geometry247Loads,movementsandfactors388Structuralanalysisanddesign579Furniture,finishesandcorrosionprotection62AnnexesAnnexA(informative)Loadcombinationsandpartialsafetyfactors66AnnexB(informative)Vehicleloadings70Bibliography71ListoffiguresFigure1–Linkspantypes18Figure2–Passengerwalkways–TypeA–Motorizedcarriageatshipentry,swivelatbuilding21Figure3–Passengerwalkways–TypeB–Motorizedcarriageatshipentryplusslavecarriageandpod22Figure4–Passengerwalkways–TypeC–Traversingdrawbridgeonboardingpod23Figure5–Passengerwalkways–TypeD–Singletunnelsupportedonrailmountedgantry23Figure6–Roadwaywidthandrecommendededgeclearanceatraisedkerbs25Figure7–Plangeometryoflinkspans26Figure8–Interfacediagrams28Figure9–Planclearancesfordesign30Figure10–Verticalgeometryguidelinesfornormalcircumstances34Figure11–Preferredtransitiongeometry37Figure12–Extremetransitionchanges37Figure13–Axleweightspacings50Figure14–Loadinginfluenceline51Figure15–Definitionofprimarysupportpathforsuspensionsystem61ListoftablesTable1–Minimumroadwaywidths24Table2–SuggestedmotionsofmooredRo-Rovesselsinharbour32Table3–Maximumoperationallongitudinalgradientsforarticulatedelements(notincludinglocalslopesatshiprampinterfaceends)36Table4–Verticalclearances38Table5–ValuesoffactorγfLforsuperimposeddeadloads39Table6–ValuesoffactorγfLfordeadloadsfromshiprampsandfingerflaps40Table7–Windonenclosedwalkways42Table8–ValuesoffactorγfLforsnowloads43Table9–ValuesoffactorγfLforwatercurrentloading44•©BSI2007Table10–ValuesoffactorγfLforwaveloading44Table11–ValuesoffactorγfLforberthingloads45Table12–ValuesoffactorγfLformooringloads45Table13–ValuesoffactorγfLforothership-inducedloads47Table14–ValuesofγfLforusewithaccidentaldamagetosuspensionsystem47Table15–Notionallanes49Table16–Standardvehicles50Table17–ValuesoffactorγfLfordesignloads54Table18–Annualflowofroadvehicles(validforupto30%HGVsonly)55Table19–Loadsonvehicleandpedestrianrestraintsystems57TableA.1–LoadstobetakenineachcombinationwithappropriatevalueofγfL66SummaryofpagesThisdocumentcomprisesafrontcover,aninsidefrontcover,pagesitoiv,pages1to72,aninsidebackcoverandabackcover.©BSI2007•iiiBS6349-8:2007ForewordPublishinginformationThispartofBS6349ispublishedbyBSIandcameintoeffecton30April2007.ItwaspreparedbySubcommitteeB/525/11,Maritimestructures,undertheauthorityofTechnicalCommitteeB/525,Buildingandcivilengineeringstructures.Alistoforganizationsrepresentedonthiscommitteecanbeobtainedonrequesttoitssecretary.BSICommitteeB/525takescollectiveresponsibilityforthepreparationofthispartofBS6349.TheCommitteewishestoacknowledgethepersonalcontributionofPaulLaceyCEng,FICE,FIStructE.,FIHT,FRSA,ChairmanofB/525from1986to2005.RelationshipwithotherpublicationsThisisanewpartoftheBS6349series.Theotherpartsintheseriesare:•Part1:Codeofpracticeforgeneralcriteria;•Part2:Designofquaywalls,jettiesanddolphins;•Part3:Designofdrydocks,locks,slipwaysandshipbuildingberths,shipliftsanddockandlockgates;•Part4:Codeofpracticefordesignoffenderingandmooringsystems;•Part5:Codeofpracticefordredgingandlandreclamation;•Part6:Designofinshoremooringsandfloatingstructures;•Part7:Guidetothedesignandconstructionofbreakwaters.ThispartofBS6349shouldbereadinconjunctionwithBS5400.WhenusingBS5400theword“bridge”shouldgenerallybereadas“structure”.ThevariousloadsandloadfactorstobeusedwhenconsideringtheultimatelimitstateandserviceabilitylimitstateshouldbeasgiveninClause8ofthispartofBS6349.AnalternativeapproachtothedesignofRo-Roramps,linkspansandwalkwaysisgivenintheLloyd’sRegisterRulesandregulationsfortheclassificationoflinkspans(hereinafterreferredtoasLloyd’sRules).BS5400isanultimatelimitstatecodeandLloyd’sRulesisaworkingstressdesigncode,andthetreatmentofloadfactorsandvehicleimpactfactorsisverydifferentbetweenthetwocodes.ItispermissibletousebothLloyd’sRulesandBS5400inthedesignofthesamestructure,providedthatthedesignertakesthefullimplicationsofeachcodeintoaccount.BothLloyd’sRulesandBS5400canbeusedasthebasisofstructuraldesignoflinkspans,butonlyLloyd’sRulesgivesguidanceonthestructuraldesignoffloatingstructures.CIRIAreportC518[1]givesanextensivediscussiononthecoverageandlimitationsofLloyd’sRules.•©BSI2007InformationaboutthisdocumentAssessedcapability.UsersofthispartofBS6349areadvisedtoconsiderthedesirab