BS 8007-1987 Code of practice for design of concre

BRITISHSTANDARDBS8007:1987CodeofpracticeforDesignofconcretestructuresforretainingaqueousliquidsUDC624.953:621.642.3.031:691.32:614.8BS8007:1987ThisBritishStandard,havingbeenpreparedunderthedirectionoftheCivilEngineeringandBuildingStructuresStandardsCommittee,waspublishedundertheauthorityoftheBoardofBSIandcomesintoeffecton30October1987.©BSI11-1998ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferenceCSB/60Draftforcomment86/12222DCISBN058016134XCommitteesresponsibleforthisBritishStandardThepreparationofthisBritishStandardwasentrustedbytheCivilEngineeringandBuildingStructuresStandardsCommittee(CSB/-)toTechnicalCommitteeCSB/60,uponwhichthefollowingbodieswererepresented:DepartmentoftheEnvironment(PropertyServicesAgency)HealthandSafetyExecutiveInstitutionofCivilEngineersInstitutionofStructuralEngineersWaterAuthoritiesAssociationAmendmentsissuedsincepublicationAmd.No.DateofissueCommentsBS8007:1987©BSI11-1998iContentsPageCommitteesresponsibleInsidefrontcoverForewordiiiSection1.General1.1Scope11.2Fieldofapplication11.3Symbols11.4Operationalsafety11.5Statutoryrequirements1Section2.Design:objectivesandgeneralrecommendations2.1Designobjectives22.2Structuraldesign22.3Loads32.4Analysisofwallsandjunctions32.5Siteconditions42.6Causesandcontrolofcracking42.7Designlifeandserviceability52.8Specification72.9Operationalsafetyconsiderations7Section3.Designanddetailing:reinforcedconcrete3.1General83.2Design8Section4.Designanddetailing:prestressedconcrete4.1General104.2Basisofdesign104.3Cylindricalprestressedconcretestructures104.4Otherprestressedconcretestructures10Section5.Design,detailingandworkmanshipofjoints5.1General115.2Typesofjoint115.3Movementjoints115.4Constructionjoints135.5Temporaryopensections145.6Jointsingroundslabs145.7Jointsinwalls145.8Jointsinroofs14Section6.Concrete:specificationandmaterials6.1General166.2Materials166.3Mixproportions166.4Workability166.5Surfacefinishofconcrete166.6Blindinglayer166.7Pneumaticallyappliedmortar16Section7.Specificationandworkmanship:reinforcement7.1General177.2Specialreinforcement17BS8007:1987ii©BSI11-1998PageSection8.Specificationandworkmanship:prestressingtendons8.1General18Section9.Inspectionandtestingofthestructure9.1General199.2Testingofstructures199.3Testingofroofs19AppendixACalculationofminimumreinforcement,crackspacingandcrackwidthsinrelationtotemperatureandmoistureeffects20AppendixBCalculationofcrackwidthsinmatureconcrete26AppendixCJointingmaterials27AppendixDBibliography30Figure5.1—Examplesofmovementjoints15FigureA.1—Surfacezones:wallsandsuspendedslabs21FigureA.2—Surfacezones:groundslabs22FigureA.3—RestraintfactorRforvariouswallandfloorslabplacingsequences25Table3.1—Allowablesteelstressesindirectorflexuraltensionforserviceabilitylimitstates9Table5.1—Designoptionsforcontrolofthermalcontractionandrestrainedshrinkage13TableA.1—Factorsforthecalculationofminimumreinforcementforcrackdistributionandcrackspacing21TableA.2—TypicalvaluesofT1forOPCconcretes,wheremoreparticularinformationisnotavailable24TableA.3—Influenceofslabproportionsonthecentrelinerestraintfactor26PublicationsreferredtoInsidebackcoverBS8007:1987©BSI11-1998iiiForewordThisBritishStandardhasbeenpreparedunderthedirectionoftheCivilEngineeringandBuildingStructuresStandardsCommittee.ItreplacesBS5337,whichiswithdrawn.FollowingthewithdrawalofCP114thealternativemethodofdesignallowedinBS5337hasbeenomittedinthisBritishStandard.Secondly,thewithdrawalofCP110anditsreplacementbyBS8110haveledtotheupdatingofthiscodetoalignwithBS8110.OneimportantchangeisthatthecrackwidthequationshavebeenmodifiedtoalignwiththerecommendationsofBS8110andnowincludeacrackwidthequationfordirecttension.Otherchangesincludeamorelogicalarrangementofobjectivesandgeneralrecommendationsfordesign,theintroductionofarestraintfactor,theintroductionofrecommendationsforpartiallyprestressedconcretestructures,improvedrecommendationsforjoints,updatingofguidanceonjointingmaterials,anelaborationoftherecommendationsforconcreteandreinforcement(includingspecialreinforcement),andarevisionoftheinspectionandtestingrecommendationsforthestructure.ForthefirsttimeinaBritishStandardcivilengineeringdesigncodethedesignerisrecommendedtoconsideroperationalsafetyandtoprovideappropriatelyatthedesignstage.Ithasbeenassumedinthedraftingofthiscodethatthedesignofliquid-retainingreinforcedandprestressedconcretestructuresisentrustedtocharteredcivilorstructuralengineersexperiencedintheuseofreinforcedorprestressedconcrete,andthatsiteconstructioniscarriedoutunderthedirectionofacompetentperson.Thiscode,whichisatype11)designcode,hasbeenpreparedbyaTechnicalCommitteeconsistingofcharteredengineersnominatedbytheorganizationsrepresented(seethebackcover).ThemembersoftheDraftingPanel,convenedbytheInstitutionofStructuralEngineers,wereasfollows.NOTEThenumbersinsquarebracketsusedthroughoutthetextofthisstandardrelatetothebibliographicreferencesgiveninappendixD.1)Type1codesaredefinedinPD6501-1as“thosedetailingprofessionalknowledgeorpractices”.MrRDAnchorBSc,CEng,FIStructE,FICEChairmanMrAHAllenMA