DMRB VOLUME 1 SECTION 1 PART 1 - BD 2/05

1 August 2005 DESIGN MANUAL FOR ROADS AND BRIDGESVOLUME 1 HIGHWAY STRUCTURES:APPROVAL PROCEDURESAND GENERAL DESIGNSECTION 1 APPROVAL PROCEDURESPART 1BD 2/05 TECHNICAL APPROVAL OF HIGHWAYSTRUCTURESSUMMARYThis Standard specifies the procedures for TechnicalApproval for Highway Structures. It updates andsupersedes BD 2 FOR USEThis revised Standard is to be incorporated in document supersedes BD 2/02, which isnow existing contents pages for VOLUME 1,and insert new contents page for VOLUME 1, datedAugust BD 2/02, which is superseded byBD 2/05, and archive as BD 2/05, in VOLUME 1, SECTION 1, part this sheet as : A quarterly index with a full set of VolumeContents Pages is available separately from TheStationery Office 2/05 Technical Approval ofHighway StructuresSummary.

2 This Standard specifies the procedures for Technical Approval for HighwayStructures. It updates and supersedes BD 2 MANUAL FOR ROADS AND BRIDGESTHE HIGHWAYS AGENCYSCOTTISH EXECUTIVEWELSH ASSEMBLY GOVERNMENTLLYWODRAETH CYNULLIAD CYMRUTHE DEPARTMENT FOR REGIONAL DEVELOPMENTNORTHERN IRELANDV olume 1 SECTION 1 part 1 BD 2/05 August 2005 REGISTRATION OF AMENDMENTSA mendPage NoSignature & Date ofAmendPage NoSignature & Date ofNoincorporation ofNoincorporation ofamendmentsamendmentsRegistration of AmendmentsVolume 1 SECTION 1 part 1 BD 2/05 August 2005 REGISTRATION OF AMENDMENTSA mendPage NoSignature &

3 Date ofAmendPage NoSignature & Date ofNoincorporation ofNoincorporation ofamendmentsamendmentsRegistration of AmendmentsVOLUME 1 HIGHWAY STRUCTURES:APPROVAL PROCEDURESAND GENERAL DESIGNSECTION 1 APPROVAL PROCEDURESPART 1BD 2/05 TECHNICAL APPROVAL OF Requirements and and Other Highway Tunnel Structures and Large ServiceTunnel Service and Electrical A: model Approval in Principle FormsAnnex B: model Technical Approval SchedulesAnnex C: model CertificatesAnnex D:Proprietary Manufactured StructuresAnnex E:Special Requirements for Records inOverseeing OrganisationsAnnex F:Special Requirements for OverseeingOrganisations concerning Third PartyProposals of Temporary Works orTemporary StructuresDESIGN MANUAL FOR ROADS AND BRIDGESA ugust 2005 VOLUME 1 SECTION 1 part 1 BD 2/05 August 20051/1 Chapter 1 Introduction1.

4 Standard specifies the TechnicalApproval (TA) procedures for Highway Structureson motorways and other trunk roads or The following Standards and Advice Noteshad been superseded and were withdrawn by the2002 version of BD 2:BD 2/79 Technical Approval of(DMRB )Highway Structures onMotorways and OtherTrunk RoadsPart IV Procedures forLighting ColumnsBD 2/89 Technical Approval of(DMRB )Highway Structures onMotorways and OtherTrunk RoadsPart I GeneralProceduresBD 2/89 Technical Approval of(DMRB )Highway Structures onMotorways and OtherTrunk RoadsPart III Procedures forTunnelsBA 32/89 Technical Approval of(DMRB )Highway Structures onMotorways and OtherTrunk RoadsPart I GeneralProceduresNIRS 7/82 DOE (NI) Roads(DMRB )

5 ServiceTechnical ApprovalScheme 6th RevisionBE 1/74 The Independent(DMRB )Checking of ErectionProposals andTemporary WorksDetails for MajorHighway Structures onTrunk Roads Major changes in this version of BD 2:(i)Clause : gives definitions for OutlineApproval in Principle, Proprietary manufacturedstructure and Third Party .(ii)Clause : requires relevant data, informationand documents to be recorded in the OverseeingOrganisation s management system forstructures.(iii)Clauses (d), (e) and (f): clarify Category 0for lighting columns, CCTV masts andcantilevered masts for traffic signals and/or speedcameras.

6 (iv)Clauses (e), (f) and (g): clarify Category 1for lighting columns, CCTV masts andcantilevered masts for traffic signals and/or speedcameras.(v)Clause (k): includes earth retainingstructures with an effective restrained height of14m or greater.(vi)Clause : clarifies Annex C2 certificate forlighting column system.(vii) Clause : clarifies categories for Types A andB. Allow category 1 for Type B proposal wherethe risk is relatively minor and with TAAagreement.(viii) Clause : clarifies requirements for certificatesand AIP of Type A proposals.

7 (ix)Clauses : clarify requirements for TypeB proposals.(x)Clause : includes model certificate C6 andclarifies requirements for certificate ofconstruction 1 SECTION 1 part 1 BD 2/05 August 20051/2 Chapter 1 Introduction(xi)Clauses , , and : include modelcertificate C6.(xii) Annex C4: amendments made.(xiii) New Annex D on Proprietary ManufacturedStructures.(xiv) New Annex E on Special Requirements forRecords in Overseeing Organisations.(xv) New Annex F on Special Requirements forOverseeing Organisations concerning Third PartyProposals of Temporary Works or the early 1970s, four failures Yarra(Australia), Milford Haven (Pembrokeshire, Wales),Koblenz (Germany) and one over the Danube (Austria),had occurred during erection.

8 Due to these failures andthe subsequent Report of the Merrison Committee, thefollowing important changes were made by the thenMinistry of Transport:(i)The Department would continue to examinedesign criteria and methods but notcomputations.(ii)The requirements by the Department for acertificate of independent check of the design andcomputations.(iii)The application of Approval in Principle (AIP)stage to all but minor structures, which wouldcover the selection of bridge type, the materialsfor its construction and methods of analysis anddesign to be TA procedures as described in this Standardgenerally require the proposer to submit an AIP to theOverseeing Organisation and to receive endorsement ofthe AIP before proceeding with any design orassessment.

9 The completed design or assessment cannotbe implemented until the Overseeing Organisation is inreceipt of certified confirmation that theimplementation documents are accurate and fully incompliance with the requirements of the TA procedural requirements impose adiscipline on the process that encourages good practiceand should reduce the possibility of errors affectingstructural fitness for purpose. Most importantlyhowever, the procedures are in place to minimise thepossible risks to highway users and others who may beaffected.

10 The procedures may be applied to any othercircumstances where the highway authority considersthe requirements to be TA procedures differ from IntegratedManagement Systems and Environmental ManagementSystems, which provide systems for quality assurance,environmental and safety management of projects withaudit and feedback processes for continuousimprovement. TA provides the comprehensive technicalrequirements that are managed and audited within theIntegrated Management Systems Plans for TA procedures will also help the OverseeingOrganisation to identify those features that are notadequately covered by existing codes and Standards.