BS 4449-2005+A2-2009

BRITISHSTANDARDBS4449:2005Steelforthereinforcementofconcrete—Weldablereinforcingsteel—Bar,coilanddecoiledproduct—SpecificationICS77.140.15;91.080.40  +A2:2009ThisBritishStandardwaspublishedundertheauthorityoftheStandardsPolicyandStrategyCommitteeon30September2005Firstpublished:BS4449:April1969BS4461:March1969Firstrevision:BS4449:May1978BS4461:May1978Secondcombinedversionas:BS4449:May1988Thirdcombinedversionas:BS4449:May1997ThefollowingBSIreferencesrelatetotheworkonthisBritishStandard:CommitteereferenceISE/9/1Draftforcomment04/30109891DCCommitteesresponsibleforthisBritishStandardThepreparationofthisBritishStandardwasentrustedbyTechnicalCommitteeISE/9,Steelforconcretereinforcement,toSubcommitteeISE/9/1,Bars,wireandfabricforconcretereinforcement,uponwhichthefollowingbodieswererepresented:BritishCoatingsFederationBritishPrecastConcreteFederationConcreteSocietyDepartmentofTransport—HighwaysAgencyGalvanizersAssociationInstitutionofStructuralEngineersUKCertificationAuthorityforReinforcingSteelsUKSteelAssociationAmendmentsissuedsincepublicationDateComments1710330April2007SeeforewordSeeforeword2009Amd.No.Amd.2BS4449:2005+A2:2009©BSI2009ISBN978058064585331MarchiContentsPageCommitteesresponsibleInsidefrontcoverForewordii1Scope12Normativereferences13Termsanddefinitions14Symbols35Designations36Steelmakingandmanufacturingprocesses37Productcharacteristics58Evaluationofconformity109Testmethods1310Identification1311Verificationofpropertiesinthecaseofdispute15AnnexA(normative)Bondtestforribbedreinforcingsteel—Beamtest16AnnexB(normative)Materialnotcoveredbyathirdpartyproductcertificationscheme23AnnexC(normative)Identificationrequirements25Bibliography27Figure1—Ribgeometryexamplewithtworowsoftransverseribs9Figure2—ExampleofribpatternforgradeB500A14Figure3—ExampleofribpatternforgradeB500B14Figure4—ExampleofribpatternforgradeB500C14FigureA.1—DimensionsofthehingeforbeamtypeA(d16mm)16FigureA.2—DimensionsofthehingeforbeamtypeB(dW16mm)17FigureA.3—BeamtesttypeA(d16mm)17FigureA.4—BeamtesttypeB(dW16mm)18FigureA.5—BondtesttypeA(d16mm)—Reinforcementofbeamspecimens20FigureA.6—BondtesttypeB(dW16mm)—Reinforcementofbeamspecimens21FigureC.1—Exampleofmanufacturer’sidentificationmark(usingwidenedribs)25Table1—Listofsymbols4Table2—Chemicalcomposition(maximum%bymass)5Table3—Conditionsoftestingthemechanicalproperties5Table4—Characteristictensileproperties6Table5—Fatiguetestconditions6Table6—Mandreldiametersforrebendtest7Table7—Nominalcross-sectionalareaandmasspermetre8Table8—Rangesfortheribparameters9Table9—Characteristicrelativeribarea9Table10—Absoluteminimumandmaximumvaluesoftensileproperties11Table11—Coefficientkasafunctionofthenumbernoftestresults(forareliablefailurerateof5%[p=0.95]ataprobabilityof90%)12Table12—Coefficientkasafunctionofthenumbernoftestresults(forareliablefailurerateof10%[p=0.90]ataprobabilityof90%)13TableA.1—Seriesofreinforcingsteeldiametersfortestingofbond18TableC.1—Identificationofthecountryoforigin26©BSI2009BS4449:2005+A2:2009iiForeword+A2:2009supersedesBS4449:2005+A1:2007,whichiswithdrawn.Thiseditionincorporatesafullrevisionofthestandard.Thecharacteristicyieldstrengthhasbeenincreasedto500MPa,andathirdductilityclasshasbeenadded,comparedtoBS4449:1997.Thisstandardnolongercoversplainroundbar.Forsizesuptoandincluding12mmincoil,plainroundwireofgrade250MPahasbeenincorporatedintoBS4482.Forlargersizes,fordowelbarapplications,referenceshouldbemadetoBSEN10025-1.Fordowelbarsforuseinconcretepavements,referenceshouldbemadetoBSEN13877-3.ThisstandardhasbeenwrittensothatitcanbeusedinconjunctionwithBSEN10080:2005.Definitions,symbols,steelmakingandmanufacturingprocesses,routineinspectionandtesting,testmethods,identificationofthemanufacturerandtechnicalclassandverificationofmechanicalpropertiesinthecaseofdisputearealltakenfromBSEN10080:2005.BSEN10080:2005doesnotdefinesteelgradesortechnicalclasses,andrequiresthattechnicalclassesshouldbedefinedinaccordancewithBSEN10080:2005,byspecifiedvaluesofRe,Rm/Re,Agt,Re,act/Re,nom(whereappropriate),fatiguestrength,bendperformance,weldability,bondstrength,tolerancesanddimensions.ThethreesteelgradesinthisstandardconformtoalloftherequirementsofBSEN10080:2005.ThethreegradesinthisstandardalsoconformtothethreerecommendedductilityclassesofBSEN1992-1-1:2004,althoughthefatiguerequirementsandthefatiguetestconditionsareretainedfromthepreviousversionofthisstandard.TheonlyexceptiontothisisforgradeB500Ainsizesbelow8mm,wheretheductilityrequirementsspecifiedarebelowthoseofBSEN1992-1-1:2004.BSEN10080:2005containsaninformativeAnnexZA,whichdescribeshowthatstandardcanbeusedforthepurposesofCEmarkingofreinforcingsteels.AnnexZAand8.2,8.3and8.4ofBSEN10080:2005relatetotheroleofthenotifiedbodyinassessingproductsforanECcertificateofconformity,andassucharenotincludedinthisstandard.ItisnotarequirementofthisBritishStandardthatmaterialsproducedtoitshouldmeettherequirementsforCEmarking.WhereCEmarkingisrequiredforthepurposesofcomplyingwiththeEUConstructionProductsDirectiv