Eurocodes

evolution - what

will it mean to

you?

28.09.2016

Steve Denton

Head of Bridges and Ground Engineering

Visiting Professor at the University of Bath

Chairman of CEN/TC 250 - Eurocodes

Evolution of the

Structural

Eurocodes - Aims,

timing, process

500 000 Engineers

€65 Billion

10-58 5000

Pages 1055 NDPs

33 Countries

97 SCs/WGs/

TGs

€4.3 Million

€11 Million

49/50

75+ Project

Teams

25 Phase 1

PTs

170+ Phase 1

Contracts

Dec

2016 2021

Agenda

4

Aims

Process

Timing

5

Enhanced

Ease of Use

Positive

Votes from

CEN Members

Aims

6

The Structural Eurocodes

CEN/TC 250’s vision for the second generation of the

Structural Eurocodes:

Whilst respecting the achievements of the past, our

vision for the second generation of Structural Eurocodes

is to create a more user-orientated suite of design

standards that are recognised as the most trusted and

preferred in the world.

7

CEN/TC 250 Position on Enhancing Ease of Use

Five pillars to enhance ease of use of the Eurocodes

8

CEN/TC 250 Position on Enhancing Ease of Use

Recommendation 1: Statements of intent to meet users’ needs

Competent civil, structural and geotechnical engineers, typically qualified

professionals able to work independently in relevant fieldsPractitioners – Competent engineers

PRIMARY TARGET AUDIENCE DEFINITION

9

We will aim to produce Standards that are suitable and clear for all common

design cases without demanding disproportionate levels of effort to apply them

Practitioners – Competent engineers

[Primary target audience]

Practioners – Graduates

We will aim to produce Eurocodes that can be used by Graduates where

necessary supplemented by suitable guidance documents and textbooks and

under the supervision of an experienced practitioner when appropriate

Expert specialistsWe will aim not to restrict innovation by providing freedom to experts to apply

their specialist knowledge and expertise

Product ManufacturersWorking with other CEN/TCs we will aim to eliminate incompatibilities or

ambiguities between the Eurocodes and Product Standards

Software developersWe will aim to provide unambiguous and complete design procedures.

Accompanying formulae will be provided for charts and tables where possible

Educators

We will aim to use consistent underlying technical principles irrespective of the

intended use of a structure (e.g. bridge, building, etc.) and that facilitate the

linkage between physical behaviour and design rules

National regulatorWe will endeavour to produce standards that can be referenced or quoted by

National Regulations

Private sectors businessesWe will continue to promote technical harmonization across European markets

in order to reduce barriers to trade

Clients

We will produce Eurocodes that enable the design of safe, serviceable, robust

and durable structures, aiming to promoting cost effectiveness throughout their

whole life cycle, including design, construction and maintenance

Other CEN/TCsWe will engage proactively to promote effective collaboration with those other

CEN/TCs that have shared interests

CATEGORIES OF

EUROCODES’ USERS

CEN/TC 250

STATEMENTS OF INTENT

Recommendation 1: Statements of intent to meet users’ needs

CEN/TC 250 Position on Enhancing Ease of Use

10

EoU - Statements of intent to meet users’ needs

We will aim to produce Standards that are suitable and clear for all common

design cases without demanding disproportionate levels of effort to apply them

Practitioners – Competent engineers

[Primary target audience]

Practioners – Graduates

We will aim to produce Eurocodes that can be used by Graduates where

necessary supplemented by suitable guidance documents and textbooks and

under the supervision of an experienced practitioner when appropriate

Expert specialistsWe will aim not to restrict innovation by providing freedom to experts to apply

their specialist knowledge and expertise

Product ManufacturersWorking with other CEN/TCs we will aim to eliminate incompatibilities or

ambiguities between the Eurocodes and Product Standards

Software developersWe will aim to provide unambiguous and complete design procedures.

Accompanying formulae will be provided for charts and tables where possible

Educators

We will aim to use consistent underlying technical principles irrespective of the

intended use of a structure (e.g. bridge, building, etc.) and that facilitate the

linkage between physical behaviour and design rules

National regulatorWe will endeavour to produce standards that can be referenced or quoted by

National Regulations

Private sectors businessesWe will continue to promote technical harmonization across European markets

in order to reduce barriers to trade

Clients

We will produce Eurocodes that enable the design of safe, serviceable, robust

and durable structures, aiming to promoting cost effectiveness throughout their

whole life cycle, including design, construction and maintenance

Other CEN/TCsWe will engage proactively to promote effective collaboration with those other

CEN/TCs that have shared interests

CATEGORIES OF

EUROCODES’ USERS

CEN/TC 250

STATEMENTS OF INTENT

11

EoU - Statements of intent to meet users’ needs

We will aim to produce Standards that are suitable and clear for all common

design cases without demanding disproportionate levels of effort to apply them

Practitioners – Competent engineers

[Primary target audience]

Practioners – Graduates

We will aim to produce Eurocodes that can be used by Graduates where

necessary supplemented by suitable guidance documents and textbooks and

under the supervision of an experienced practitioner when appropriate

Expert specialistsWe will aim not to restrict innovation by providing freedom to experts to apply

their specialist knowledge and expertise

Product ManufacturersWorking with other CEN/TCs we will aim to eliminate incompatibilities or

ambiguities between the Eurocodes and Product Standards

Software developersWe will aim to provide unambiguous and complete design procedures.

Accompanying formulae will be provided for charts and tables where possible

Educators

We will aim to use consistent underlying technical principles irrespective of the

intended use of a structure (e.g. bridge, building, etc.) and that facilitate the

linkage between physical behaviour and design rules

National regulatorWe will endeavour to produce standards that can be referenced or quoted by

National Regulations

Private sectors businessesWe will continue to promote technical harmonization across European markets

in order to reduce barriers to trade

Clients

We will produce Eurocodes that enable the design of safe, serviceable, robust

and durable structures, aiming to promoting cost effectiveness throughout their

whole life cycle, including design, construction and maintenance

Other CEN/TCsWe will engage proactively to promote effective collaboration with those other

CEN/TCs that have shared interests

CATEGORIES OF

EUROCODES’ USERS

CEN/TC 250

STATEMENTS OF INTENT

We will aim to produce Standards that are suitable and clear for all common

design cases without demanding disproportionate levels of effort to apply them

Practitioners – Competent engineers

[Primary target audience]

Practioners – Graduates

We will aim to produce Eurocodes that can be used by Graduates where

necessary supplemented by suitable guidance documents and textbooks and

under the supervision of an experienced practitioner when appropriate

Expert specialistsWe will aim not to restrict innovation by providing freedom to experts to apply

their specialist knowledge and expertise

Product ManufacturersWorking with other CEN/TCs we will aim to eliminate incompatibilities or

ambiguities between the Eurocodes and Product Standards

Software developersWe will aim to provide unambiguous and complete design procedures.

Accompanying formulae will be provided for charts and tables where possible

Educators

We will aim to use consistent underlying technical principles irrespective of the

intended use of a structure (e.g. bridge, building, etc.) and that facilitate the

linkage between physical behaviour and design rules

National regulatorWe will endeavour to produce standards that can be referenced or quoted by

National Regulations

Private sectors businessesWe will continue to promote technical harmonization across European markets

in order to reduce barriers to trade

Clients

We will produce Eurocodes that enable the design of safe, serviceable, robust

and durable structures, aiming to promoting cost effectiveness throughout their

whole life cycle, including design, construction and maintenance

Other CEN/TCsWe will engage proactively to promote effective collaboration with those other

CEN/TCs that have shared interests

CATEGORIES OF

EUROCODES’ USERS

CEN/TC 250

STATEMENTS OF INTENT

12

Recommendation 2: Principles and related priorities

General principles (primary)

1 Improving clarity and understandability of technical provisions of the Eurocodes

2 Improving accessibility to technical provisions and ease of navigation between them

3 Improving consistency within and between the Eurocodes

4 Including state-of the-art material the use of which is based on commonly accepted results of research and

has been validated through sufficient practical experience

5 Considering the second generation of the Eurocodes as an “evolution” avoiding fundamental changes to the

approach to design and to the structure of the Eurocodes unless adequately justified

Specific principles (secondary)

6 Providing clear guidance for all common design cases encountered by typical competent practitioners in the

relevant field

7 Omitting or providing only general and basic technical provisions for special cases that will be very rarely

encountered by typical competent practitioners in the relevant field

8 Not inhibiting the freedom of experts to work from first principles and providing adequate freedom for

innovation

9 Limiting the inclusion of alternative application rules

10 Including simplified methods only where they are of general application, address commonly encountered

situations, are technically justified and give more conservative results than the rigorous methods they are

intended to simplify

11 Improving consistency with product standards and standards for execution

12 Providing technical provisions that are not excessive sensitive to execution tolerances beyond what can be

practically achieved on site

CEN/TC 250 Position on Enhancing Ease of Use

13

EoU - Principles and related priorities

General principles (primary)

1 Improving clarity and understandability of technical provisions of the Eurocodes

2 Improving accessibility to technical provisions and ease of navigation between them

3 Improving consistency within and between the Eurocodes

4 Including state-of the-art material the use of which is based on commonly accepted results of research and

has been validated through sufficient practical experience

5 Considering the second generation of the Eurocodes as an “evolution” avoiding fundamental changes to the

approach to design and to the structure of the Eurocodes unless adequately justified

Specific principles (secondary)

6 Providing clear guidance for all common design cases encountered by typical competent practitioners in the

relevant field

7 Omitting or providing only general and basic technical provisions for special cases that will be very rarely

encountered by typical competent practitioners in the relevant field

8 Not inhibiting the freedom of experts to work from first principles and providing adequate freedom for

innovation

9 Limiting the inclusion of alternative application rules

10 Including simplified methods only where they are of general application, address commonly encountered

situations, are technically justified and give more conservative results than the rigorous methods they are

intended to simplify

11 Improving consistency with product standards and standards for execution

12 Providing technical provisions that are not excessive sensitive to execution tolerances beyond what can be

practically achieved on site

14

EoU - Principles and related priorities

General principles (primary)

1 Improving clarity and understandability of technical provisions of the Eurocodes

2 Improving accessibility to technical provisions and ease of navigation between them

3 Improving consistency within and between the Eurocodes

4 Including state-of the-art material the use of which is based on commonly accepted results of research and

has been validated through sufficient practical experience

5 Considering the second generation of the Eurocodes as an “evolution” avoiding fundamental changes to the

approach to design and to the structure of the Eurocodes unless adequately justified

Specific principles (secondary)

6 Providing clear guidance for all common design cases encountered by typical competent practitioners in the

relevant field

7 Omitting or providing only general and basic technical provisions for special cases that will be very rarely

encountered by typical competent practitioners in the relevant field

8 Not inhibiting the freedom of experts to work from first principles and providing adequate freedom for

innovation

9 Limiting the inclusion of alternative application rules

10 Including simplified methods only where they are of general application, address commonly encountered

situations, are technically justified and give more conservative results than the rigorous methods they are

intended to simplify

11 Improving consistency with product standards and standards for execution

12 Providing technical provisions that are not excessive sensitive to execution tolerances beyond what can be

practically achieved on site

Agenda

15

Aims

Process

Timing

European Commission Specific Mandate M/515

16

CEN/TC 250 Technical response

17

• 138 pages

• Over 1000 experts from across Europe

involved

• Structure of tasks and sub-tasks

• Phased programme

CEN/TC 250 Work Programme Structure

18

SC / WG

etcTask 1

Task 2

Task n

Sub-taskSub-task

Sub-taskSub-task

Sub-taskSub-task

Sub-taskSub-task

Sub-taskSub-task

Sub-taskSub-task

CEN/TC 250 Structural Eurocodes

19

CEN/TC 250 Detailed Task Plans

20

CEN/TC 250 Phased Programme

21

CEN/TC 250 Work Programme Structure

22

CEN/TC 250 Evolution Overview

23

EN

1990

EN

1991

EN

1992

EN

1993

EN

1994

EN

1995

EN

1996

EN

1997

EN

1998

EN

1999

Gla

ss

FR

P

Mem

bra

ne

Robustness

Assessment

Climate change

Ease of use

Systematic Review Comments

24

Mandate M515 Work

Programme

Eurocode Systematic

Review Comments

Evolution of

Eurocodes

Eurocode Evolution Process

25

Follow CEN Internal

Regulations

Specific information

available in CEN/TC

250 document N1250 [CEN, Eurocodes]

Further details

available in Phase 1

call for experts

specification (Vol 3) [NEN, Eurocodes 2020]

Eurocode Evolution Process

26

Follow CEN Internal

Regulations

Specific information

available in CEN/TC

250 document N1250 [CEN, Eurocodes]

Further details

available in Phase 1

call for experts

specification (Vol 3) [NEN, Eurocodes 2020]

Agenda

27

Aims

Process

Timing

28

The Structural Eurocodes E

uro

co

des

sta

rte

d

1975 E

NV

s s

tart

ed

1990

Pu

blic

ati

on

of

EN

Vs

1992

Co

nve

rsio

n o

f E

NV

to

EN

1998

Pu

blic

ati

on

1st g

en

era

tio

n o

f th

e E

uro

co

des

2007

Pro

gra

mm

ing

Ma

nd

ate

2010

Re

sp

on

se

to

Pro

gra

mm

ing

Ma

nd

ate

2011

Sp

ec

ific

Ma

nd

ate

2012

Timeline - Historic

29

The Structural Eurocodes P

ub

lic

ati

on

1st g

en

era

tio

n o

f th

e E

uro

co

des

2007

Pro

gra

mm

ing

Ma

nd

ate

2010 R

es

po

nse

to

Pro

gra

mm

ing

Ma

nd

ate

2011

Sp

ec

ific

Ma

nd

ate

2012

Te

ch

nic

al R

es

po

nse

to

Sp

ec

ific

Ma

nd

ate

2013

Timeline – Latest status

Ph

as

e 1

Qu

ota

tio

n S

ub

mit

ted

2014

Ph

as

e 1

Fu

nd

ing

Gra

nte

d;

Call

fo

r E

xp

ert

s;

P1

PTs

fo

rme

d

2015

Ph

as

e 2

Qu

ota

tio

n s

ub

mit

ted

; F

un

din

g a

wait

ed

2016

30

Phase 1 – Project Team Programme

See Call for Experts, Specification, Annex C

Community

participation - Why

your involvement is

vital, how it can be

achieved

Why Design Standards Matter?

Impact

International trade

Verification of adequacy

Feedback

New societal demands

Research to application

Development Cycles Comparing infrastructure and digital technology

Bridge design life, 120 years

Building design life, 50 years

Crossrail construction, 9 years

Shard construction, 5 years

Autodesk major release, 1 years

App Store avg update, 30 days

Autodesk product support, 3 years

Historical evolution (*)

42

Years

No

. o

f d

esig

n s

tan

dard

s

~1

75

0 B

C

~20

0 B

C

~18

50

2020

New

construction

materials Code of

Hammurabi

Ten Books of

Architecture

(Vitruvius)

New mathematical theories of

materials and structural behaviour

~19

26

~19

45

Re-thinking of structural safety

concepts + Introduction of computers

2007

~19

70

Reliability-based

design standards

Deterministic design standards

Publication of the 1st

generation of Eurocodes

Publication of the 2nd

generation of Eurocodes

If a designer-builder has designed-built a home for a

man and his work is not good, and if the house he

has designed-built falls in and kills the householder,

that designer-builder shall be slain

Rule 229, Code of Hammurabi

(*) The graph is indicative

Who develops design Standards?

28.09.2016

Steve Denton

Head of Bridges and Ground Engineering

Visiting Professor at the University of Bath

Chairman of CEN/TC 250 - Eurocodes

Concerns for the UK

The Structural Eurocodes

45

Eurocodes

(EN1990 – EN1999)

+

National Annexes

European

Product

Standards

European

Execution

Standards

European standards for construction

Non-contradictory

complementary

information

Client implementation and requirements

Support to the profession

Concerns …

46

Thank you for written submissions

Opportunity to raise specific concerns

− Will be recorded by BSI and discussed by B525

28.09.2016

Steve Denton

Head of Bridges and Ground Engineering

Visiting Professor at the University of Bath

Chairman of CEN/TC 250 - Eurocodes

What happens next

Some key dates …

48

December 2016 – Call for Experts for Phase 2

April 2017 – 2nd draft deliverables from Phase 1 PTs

Sept 2017 – (informal) enquiry on Phase 1 PT deliverables