CBDG Annual Conference

Update on the Implementation of Eurocodes

2 July 2009

Hideo TakanoHighways Agency

CBDG – Eurocodes update

Presentation coverage• Background • Highways Agency current position on

Eurocodes implementation and timescales

• Other bridge owners – adoption of Eurocodes

CBDG – Eurocodes updateWhat are the Eurocodes? • Pan-European structural design codes• Ten Eurocodes in a total of 58 parts covering: basis

of design; actions on structures; design of structural elements in concrete, steel, composite concrete and steel, timber, masonry and aluminium; together with geotechnical and seismic design

• Cover the design of bridges, buildings, silos, tanks, pipelines, towers, masts and more

CBDG – Eurocodes updateWhy develop Eurocodes? • 1975 the Commission of the European Community -

action programme in construction based on Article 95 of the Treaty of Rome

• Objective - elimination of technical obstacles to trade and the harmonisation of technical specifications

• Introduction of Eurocodes will eliminate technical obstacles to trade due to differing design codes

• Harmonise technical specifications for public procurement - creating a more open marketplace

CBDG – Eurocodes updateWhat are the National Annexes?BS EN 1990 states that:• The National annex may only contain information on those

parameters which are left open in the Eurocode for national choice, known as Nationally Determined Parameters, to be used for the design for buildings and civil engineering works to be constructed in the country concerned, i.e.:• values and/or classes where alternatives are given in the Eurocode,• values to be used where a symbol only is given in the Eurocode• country specific data (geographical, climatic etc.), e.g. snow map,• the procedure to be used where alternative procedures are given in

the Eurocode.• It may also contain

• decisions on the application of informative annexes,• references to non-contradictory complementary information to

assist the user to apply the Eurocode.”

CBDG – Eurocodes updateAre the Eurocodes mandatory? • Under the Public Procurement Directive, the Member States

must accept designs to Eurocodes• Eurocodes will become the standard technical specification for

all public works contracts: where a contract for a public body contains a technical specification this should reference the appropriate European Standards

• For Highways Agency schemes Eurocodes will be specified for the design of new structures (but not for assessment or modification of existing structures)

• British Standards Institution (BSI) will not maintain the withdrawn UK standards, in reality there will be little option but to use the Eurocodes

• The engineering industry has been encouraged to prepare for the changeover to Eurocodes

CBDG – Eurocodes updateWhat is the target date for the introduction of Eurocodes

to the UK? • All 58 Eurocode parts are now available, and most of

the National Annexes are expected to be published by the end of 2009

• The Eurocodes will co-exist with the current National Standards until 31 March 2010, when BSI is expected to withdraw all conflicting National Standards and the Eurocodes become the main structural design standards

CBDG – Eurocodes updateWhat are Published Documents?• Published Documents, or PDs, are documents that hold a lower

status than a Standard• Some UK specific non-contradictory complementary information

(NCCI) for bridges will be published in PDs and this information will be referenced in the National Annexes

• Much of the NCCI is likely to be from the current National codesthat will be withdrawn, but a wide variety of NCCI from other sources will also be referenced

• The BSI intends to publish a number of PDs relating specifically to the design of bridges. This includes background information for the National Annexes, and in some cases residual information from existing standards that has been adapted to compliment the Eurocodes.

CBDG – Eurocodes update

Are the Eurocodes as safe as current UK standards?

• Eurocodes are regarded to be safe and reliable and have already been used in Europe

• Partial safety factors in the National Annexes are determined by the UK and will ensure a level of reliability compatible with the existing UK standards

CBDG – Eurocodes update

How will Eurocodes be maintained? • Procedures for the care and maintenance of

Eurocodes have been developed and this will be supported by the CEN (European Committee for Standardization) committee structure and the national Standards Bodies

• Correction of errors will be handled by issuing corrigenda and it is expected that the Eurocodes will be updated on a five-year cycle

CBDG – Eurocodes update

An update on progress of publication of Eurocodes • All 58 Eurocode parts published by BSI; 44 NAs

published to date• Remaining (4-5) critical bridge NAs and PDs:

expected mid/late-2009• Blue-highlights show recent progress

• Information on latest update taken from Eurocode Expert and BSI websites

Progress - EN1990(Basis of design)

exp. June/July 09

(Annex for Bridges )

EN1990 A2

Project to be created

Published Basis EN1990

PDNATitleEurocodes

Progress - EN1991 (Action)

exp. Sept 09PublishedTraffic EN1991-2

PublishedPublishedAccidentalEN1991-1-7

XPublishedExecution EN1991-1-6

exp. Sept 09PublishedThermalEN1991-1-5

exp. July 09Published WindEN1991-1-4

XPublishedSnow EN1991-1-3

Decision on publication deferred

Published DensitiesEN1991-1-1

PDNATitleEurocodes

Progress - EN1992 (Concrete)

PD6687 Published(PD6687-1 exp. Sep 09)

Published(Amd exp. Sep 09)

GeneralEN1992-1-1

PublishedPublishedBridgesEN1992-2

PDNATitleEurocodes

Progress - EN1993 (Steel)

XPublishedJointsEN1993-1-8PublishedPublishedFatigueEN1993-1-9PublishedPublishedFractureEN1993-1-10

XPublishedHS SteelEN1993-1-12XPublishedCablesEN1993-1-11

XPublishedPlated Structure

EN1993-1-5PublishedPublishedBridgesEN1993-2XPublishedGeneralEN1993-1-1PDNATitleEurocodes

Progress - EN1994 (Composite)PDNATitleEurocodes

PublishedPublishedComposite Bridges

EN1994-2

Progress of EN1997 (Geotechnics) &

EN1998 (Earthquake Resistance)

exp. June 09Earthquake – bridges

EN1998-2 exp. June 09

PublishedEarthquake – general

EN1998-1

PublishedEarthquake – foundation

EN1998-5

exp. June 09PublishedGeotechnics – general

EN1997-1

PDNATitleEurocodes

Progress of Execution Standards for Steel & Concrete

TBC but possibility of NA

PD6705-2exp. Mid-09

X

PD Status

ImminentCE marking for steel

EN1090-1

PublishedExecution for Steel

EN1090-2

Mid-late 09?Execution for Concrete

EN13670

StatusTitleExecution Standards

Remaining key publicationsExpected Mid-2009:• NA to BS EN 1990 Annex A2: Application for bridges• NA to BS EN 1993-5: Steel Piling• PD 6694: Recommendations for the design of structures subject

to traffic loading to BS EN 1997-1:2004• NA to BS EN 1997-2: Ground investigation and testing• NA to BS EN 1998-2: Design for earthquake (bridges)• PD 6705-2: Use of BS EN 1090-2 for specification of steel

structures (title TBC)

Expected Mid-Late 2009:• BS EN 13670: Execution of concrete structures

CBDG – Eurocodes update

Highways Agency - Key ongoing activities

• Eurocode Implementation Standard (BD 100) and revised BD 2 dealing with technical approval progressing towards final drafts

• Promoted via Interim Advice Note on Eurocodes Implementation

• Communications and Programme of Implementation

CBDG – Eurocodes updateHighways Agency - Key dates & milestones

Mid-2009: Design using Eurocodes to become more common• Publication of remaining NAs and PDs• Publication of IAN for the Implementation of Eurocodes (inc. draft BD 100)Mid-2009 to early-2010: Transition period• Publication of Execution Standards for concreteMarch 2010: UK to use Eurocodes for design of all public works• National Standards withdrawn and replaced by Eurocodes (in 38 weeks!)May 2010:• Publication of Implementation Document (BD 100) for EurocodesMid-2010 onwards:• Retained DMRB and MCHW revised to align with Eurocodes / Execution

Standards

CBDG – Eurocodes updateMajor challenges ahead

• Review of Implementation Standard (BD 100) for Eurocodes by Technical Project Board

• Preparation and publication of IAN for the Implementation of Eurocodes

• Publication of Implementation Standard (BD 100)

• Update/amendments to DMRB for Eurocodes

• Preparation/publication of IAN for changes to the MCHW

• Update/amendments to MCHW for Execution Standards

CBDG – Eurocodes updateMajor challenges ahead (cont’d)

• Highways Agency readiness for Eurocode implementation (Major Projects, Network Services, Network Operations)

• Supply chain readiness for Eurocode implementation

• Communications – internally between directorates, and externally with supply chain, customers, the wider industry and other client organisations

CBDG – Eurocodes updateCommercial issues • Impact Study – costs (design and construction),

timescales, readiness of supply chain• Training – HA internal staff only• Not training supply chain• Use of external suppliers for training and conferences• HA papers at conferences• Software availability• Guidance available – guides, sample designs

CBDG – Eurocodes updateHighways Agency implementation standard (BD100)• Applies to the design of new structures (not for

assessment or modification of existing structures)• Technical Project Board / Steering Group• Representatives from Transport Scotland, Transport

Wales, Northern Ireland Roads Services• CSS• Concrete Centre, SCI

CBDG – Eurocodes updateOther standards issues• Parallel standards issues• Withdrawal of existing standards• Assessment and strengthening • Bridge modification

CBDG – Eurocodes updateApplication to other Bridge Owners• By adoption of HA standards• Public Procurement and Construction Products

Directives – do they apply?• Withdrawal of existing standards• Commercial supply chain pressures• Software availability

CBDG – Eurocodes update

Thank you