Madrid 9. December 2013

Kjetil Myhre

Chairman ECCS/TC9

Manager Norwegian Steel Association

Infrastructure

Steel in Norway;

Requirements and Specifications

Norwegian Steel

Association

has promoted the use

of steel since 1993

EN 1090

EN 1090

Execution of steel structures and aluminium structures

EN 1090-1: Requirements for conformity assessment of

structural components (inclusive rules for CE Marking)

EN 1090-2: Technical requirements for steel structures

EN 1090-3: Technical requirements for aluminium structures

NB! EN 1090-1 is a harmonised standard (hEN)

CEN/TC 135 with Norwegian chairman and secretariat

Technical committee

TC 135

Working group

WG 2

Working group

WG 1

Experts from:

Companies

Authorities

R & D

Organizations

Consumers

Manufacturers

Working group

WG 3

CE marking

EN 1090-1 is a “technical spesification” and basis for:

- Certification of manufacturer’s FPC* system

- Declaration of Performance (DoP)

- CE Marking

Time schedule CE Marking:

Published in Official Journal (OJ)

& start CE-merking: 1. January 2011

Co-existence / transition period: 3,5 years

Mandatory CE Merking: 1. July 2014

* FPC = Factory production control

CPR & CE Marking

Objective:

To promote common

standards across Europe

in order to make trade

easier, by CE-marking and

declaring the performance

of the products

New Construction Products Regulation (CPR)

CPR & CE Marking

New Construction Products Regulation (CPR)

The CPD was withdrawn and the full CPR came into

force: 1. July 2013

CE Marking is absolute mandatory in EU member states

from 1. July 2013 and in Norway from 1. January 2014*

(except NS-EN 1090-1 who has the date 1. July 2014)

* When there is a harmonised standard where the co-existence

period has expired or when there is an ETA

Regulations and standards

The Planning and Building Act

+ Regulations on technical requirements

including Construction Products Regulation (CPR)

Basis of structural design

NS-EN 1990 + National Annexes

Projecting standards

NS-EN 1991-1998 + National Annexes

Execution standard NS-EN 1090-2

Product and test standards

Regulations and standards

Additional national standards

Norwegian contract standards for execution of building

and civil engineering works: NS 8405/7 & 15/17

Specification texts for building, construction

& installations: NS 3420

The Norwegian Public Roads Administration:

- Manual 025 Standard specification texts for road contracts

- Manual 026 Standard specification texts for bridges and quays

- Manual 185 Bridge design (Eurocode version)

- Manual 122 Cables for suspension bridge

Jernbaneverket (Norwegian government’s agency for railway

services): Technical regulations

Eurocodes

NS-EN 1993 Design of Steel Structures

NS-EN 1993-1 General rules and rules for buildings.

NS-EN 1993-2 Steel bridges.

NS-EN 1993-3 Towers, masts and chimneys.

NS-EN 1993-4 Silos, tanks and pipelines.

NS-EN 1993-5 Piling.

NS-EN 1993-6 Cane supporting structures.

NS-EN 1993-2 to EN 1993-6 refer to the generic rules in NS-EN 1993-1.

The rules in parts NS-EN 1993-2 to NS-EN 1993-6 supplement the generic rules

in NS-EN 1993-1.

NS-EN 1994 Design of composite steel and concrete structures

NS-EN 1994-1-1 General rules and rules for buildings

NS-EN 1994-1-2 Structural fire design

NS-EN 1994-2 Bridges

Eurocodes

NS-EN 1993-1 Design of Steel Structures

NS-EN 1993-1-1 General rules and rules for buildings.

NS-EN 1993-1-2 Structural fire design.

NS-EN 1993-1-3 Cold-formed thin gauge members and sheeting.

NS-EN 1993-1-4 Stainless steels.

NS-EN 1993-1-5 Plated structural elements.

NS-EN 1993-1-6 Strength and stability of shell structures.

NS-EN 1993-1-7 Strength and stability of planar plated structures transversely loaded.

NS-EN 1993-1-8 Design of joints.

NS-EN 1993-1-9 Fatigue strength of steel structures.

NS-EN 1993-1-10 Material toughness and through-thickness properties.

NS-EN 1993-1-11 Design of structures with tension components made of steel.

NS-EN 1993-1-12 Supplementary rules for high strength steel.

Eurocode 3

Select proper steel for outdoor climate NS-EN 1993-1-9 National Annex: Table NA.2(904)

Bridges: NS-EN 1993-2 National Annex: Table NA.3(901)

Service temperature: -50°C - +35°C Note: The lowest service temperature is given in NS-EN 1991-1-5/NA.

NS-EN 1993-2 National Annex: Table NA.3(901):

Maximum permitted thickness in mm for bridges

NS-EN 1090

• EN 1090-1 contains no technical requirements

for execution, only rules to demonstrate

conformity between the component's properties

and the declaration (“CE Marking standard”)

• The technical requirements are given in NS-EN

1090-2 (steel) and NS-EN 1090-3 (aluminium)

• These standards cover all types of load bearing

structures and single components

CE Marking is only for manufacturing, not erection

CE Marking is only delivered building site

NS-EN 1090-2

Scope • Hot rolled, structural steel products up to and

including grade S690

• Cold formed components and sheeting up to and

including grade S700

• Hot finished and cold formed stainless steels

• Hot finished and cold formed structural hollow

sections

• Also custom-made sections manufactured by welding

• Also grades up to and including S960, if necessary

additional requirements are specified.

The standard applies to steel structures designed

according to relevant parts of Eurocode 3 and 4

NS-EN 1090-2 Contents

1 Scope

2 Normative references

3 Terms and definitions

4 Specifications and documentation

5 Constituent products

6 Preparation and assembly

7 Welding

8 Mechanical fastening

9 Erection

10 Surface treatment

11 Geometrical tolerances

12 Inspection, testing and correction

Some definitions in NS-EN 1090-2

Execution class a set of requirements specified for the execution of the works as a

whole, of an individual component or of a detail of a component

Constituent product material and product used for manufacturing a component and

which remains as part of it, e.g. structural steel product, stainless

steel product, mechanical fastener, welding consumable

Component a part of a steel structure (made of constituent products) which

may be an assembly of several smaller components

NS-EN 14399-3:

• Identification

• Inspection documents

• Traceability

• Steel grade (S355…)

• Surface condition

• Structural steels

• Welding consumables

• Mechanical fasteners

• Hot rivets

• Grouting materials

• Expansion joints for

bridges

• High strength cables, rods

and terminations

5 Constituent products

6 Preparation and assembly

• Identification/marking

• Handling and storage

• Shearing/cutting

• Shaping/forming

• Holing

• Cut outs

• Assembly

7 Welding

• Welding plan

• Welding processes

• Qualification of welding

procedures and welding

personnel

• Preparation and execution of

welding

• Acceptance criteria

• Welding of stainless steels

8 Mechanical fastening

• Bolting assemblies

• Preparation of contact surfaces

• Tightening of bolts

• Hot riveting

• Fit bolts

• Fastening of thin gauge components 1 - mutter

2 - underlagsskive under mutteren når

mutteren dreier under stramming

3 - mellomleggsskive®

4 - måleinnretning for skruens strekk

5 - avfaset underlagsskive for

sammensettingen eller den avfasede

mellomleggsskiven

6 - skruehode

9 Erection

• Safety of the works

• Description of the erection method (design basis)

• Survey (Site measurements)

• Supports, anchors and bearings

• Erection and work at site

- Drawings

- Marking

- Handling and storage

- Trial erection

- Erection methods

10 Surface treatment

• Preparation of steel

• Corrosivity categories

• Galvanizing

• Sealing of spaces

• Inaccessible surfaces

• Repairs after cutting or welding

• Cleaning after erection

ISO 8501-3:

11 Geometrical tolerances

Essential and functional tolerances

Erection Manufacturing

12 Inspection, testing and correction

Requirements for inspection and testing included in quality

documentation or quality plan as relevant:

• Constituent products and components

• Manufacturing

• Welding

• Mechanical fastening

• Surface treatment and corrosion protection

• Erection

What is execution class?

A set of requirements, given in class, for execution of:

• The whole construction;

• A part of the construction;

• One single component;

• A group of details;

• One single detail;

This means: A construction may have one or more execution

classes (EXC)

Execution classes

Four execution classes: from EXC 1 to EXC 4

Grade of strictness increase from EXC1 to EXC 4

If class is not specified: applies EXC2

The requirements according to execution classes are

summarised in Annex A.3

Guidelines for choosing execution class is given in

informative Annex B.

Execution classes

The criteria for the selection of execution class

Designers choose from three different conditions:

• Consequence Class (CC1 to CC3)

- defined in NS-EN 1990 in informative annex B

• Service Category (SC 1 or SC2)

- defined in NS-EN 1090-2 informative Annex B

• Product Category (PC1 or PC2)

- defined in NS-EN 1090-2 informative Annex B

Execution classes

Consequences of failure or malfunction of the structure

Consequences classes = Reliability classes

NB! Particular members of the structure may be designated in the same, higher or

lower consequences class than for the entire structure.

Hazards connected with the use of the structure

Service Category (SC)

NB! A structure or part of a structure can contain components or structural details

that belong to different service categories.

Hazards connected with execution of the structure

Production categories (PC)

NB! A structure or part of a structure may contain components or structural details

that belong to different production categories.

Table B.3 — Recommended matrix for determination of

execution classes

EN 1090-2

Execution classes

Table B.3 — Recommended matrix for determination of

execution classes

EN 1090-2

Execution classes

≥ S355

Static

Medium

Guidance:

Actual construction types. A rough classification:

EXC1 Small houses, warehouses, agricultural buildings, nurseries, quays. Welded and non-welded structures with simple fabrication

EXC2 Homes, offices, commercial buildings, halls, institutional buildings, harbor facilities, towers, masts, small road bridges and footbridges…

EXC3 Larger road and railway bridges, crane structures, large buildings with huge crowds, large tribunes, sports arenas ...

EXC4 Nuclear facilities, extraordinary designs. As for EXC3 but with particularly large impact, high utilization by fatigue and complex fabrication conditions.

Execution classes

If the required execution class for components or details is

different from that applicable to the structure, then the

components or details

shall be clearly identified.

New proposal: Annex in EN 1993-1-1

NOTE The National Annex may specify the choice of execution class in

terms of types of components or details. The following is recommended:

If EXC1 is selected for a structure, then EXC2 shall apply to the following

types of component:

a) welded components manufactured from steel products of grade S355 and

above;

b) welded components essential for structural integrity that are assembled

by

welding on the construction site;

c) welded components of CHS lattice girders requiring end profile cuts;

d) components with hot forming during manufacturing or receiving thermic

treatment during manufacturing.

New proposal: Annex in EN 1993-1-1

Table A.3 Requirements to each EXC

Requirements for welding

Welding in general (7.1)

Quality requirements in accordance with EN ISO 3834:

EXC1: Part 4 "Elementary quality requirements";

EXC2: Part 3 "Standard quality requirements";

EXC3 and EXC4: Part 2 "Comprehensive quality

requirements".

Requires a welding plan prepared for the work

NS-EN 1090-2: Table 14 Technical knowledge of the

welding coordinator (RWC). Structural carbon steels

EXC Steels

(steel group) Reference standards

Thickness (mm)

t ≤ 25 a 25 < t ≤ 50 b t > 50

EXC2

S235 to S355

(1.1, 1.2, 1.4)

EN 10025-2, EN 10025-3, EN 10025-4 EN 10025-5, EN 10149-2, EN 10149-3

EN 10210-1, EN 10219-1 B S C c

S420 to S700 (1.3, 2, 3)

EN 10025-3, EN 10025-4, EN 10025-6 EN 10149-2, EN 10149-3 EN 10210-1, EN 10219-1

S C d C

EXC3

S235 to S355

(1.1, 1.2, 1.4)

EN 10025-2, EN 10025-3, EN 10025-4 EN 10025-5, EN 10149-2, EN 10149-3

EN 10210-1, EN 10219-1 S C C

S420 to S700 (1.3, 2, 3)

EN 10025-3, EN 10025-4, EN 10025-6 EN 10149-2, EN 10149-3 EN 10210-1, EN 10219-1

C C C

EXC4 Alle Alle C C C

a Column base plates and endplates ≤ 50 mm. b Column base plates and endplates ≤ 75 mm. c For steels up to and including S275, level S is sufficient. d For steels N, NL, M and ML, level S is sufficient.

National approved Welding Coordinator 1090-2

and IIW competence

EXC Steels

(steel group) Reference standards

Thickness (mm)

t ≤ 25 a 25 < t ≤ 50 b t > 50

EXC2

S235 to S355

(1.1, 1.2, 1.4)

EN 10025-2, EN 10025-3, EN 10025-4 EN 10025-5, EN 10149-2, EN 10149-3

EN 10210-1, EN 10219-1

Nivå2 eller IWS

Nivå 3 eller IWT IWE c

S420 (1.3, 2.1)

EN 10025-3, EN 10025-4, EN 10025-6 EN 10149-2, EN 10149-3 EN 10210-1, EN 10219-1

Nivå 3 eller IWT

Nivå 3 eller IWE d

IWE S420 to S700

(1.3, 2, 3) generelt

IWT IWE d

EXC3

S235 to S355

(1.1, 1.2, 1.4)

EN 10025-2, EN 10025-3, EN 10025-4 EN 10025-5, EN 10149-2, EN 10149-3

EN 10210-1, EN 10219-1

Nivå 3 eller IWT IWE IWE

S420 (1.3, 2.1) EN 10025-3, EN 10025-4, EN 10025-6

EN 10149-2, EN 10149-3 EN 10210-1, EN 10219-1

Nivå 3 eller IWE

IWE IWE S420 to S700

(1.3, 2, 3) IWE

EXC4 Alle Alle IWE IWE IWE

a Column base plates and endplates ≤ 50 mm. b Column base plates and endplates ≤ 75 mm. c For steels up to and including S275, level S is sufficient. d For steels N, NL, M and ML, level S is sufficient.

NS EN 1090-2

Quality requirements & NDT of welds

Qualifying for execution. The first 5 welds with new WPS

must always meet the following requirements:

- The quality level B (ISO 5817)

- NDT shall be double of the values in Table 24

- Minimum length to be inspected is 900 mm

- If inspection gives non conforming results, a new set of

five joints shall be tested

- After acceptable result the manufacturing shall meet:

- EXC1 quality level D

- EXC2 quality level C (partly level D)

- EXC3 quality level B

- EXC4 quality level B + (additional requirements)

- The extent of supplementary NDT shall meet Table 24.

NS EN 1090-2

Quality requirements & NDT of welds

Specifications and documentation

1 Execution

Specification

2 Constructor's

Documentation

NS-EN 1090-2 requires

+

1 Execution Specification All necessary information and technical requirements for execution

2 The constructor's documentation

- Quality plan and documentation

- Welding plan

- Erection works and safety plan

- Inspection plan

- Execution / AS-built documentation

Documentation

Execution Specification

The engineer should draw up the Execution

Specification! - So that the load bearing

capacity, stability and functionality are met.

The steel contractor must ensure that the

Execution Specification meets the

requirements of EN 1090-2 and eventually

supplement with the missing.

The steel contractor is responsible!

NS-EN 1090-2 requires Execution Specificaton

= Necessary information and technical requirements for

execution incl. procedures for alterations

shall consider the following items when relevant:

a) additional information, as listed in A.1;

b) options, as listed in A.2;

c) execution classes, see 4.1.2;

d) preparation grades, see 4.1.3;

e) tolerance classes, see 4.1.4;

f) technical requirements regarding the safety of the works,

see 4.2.3 and 9.2.

Execution Specification

Execution Specification

Execution Specification

Requirements for conformity assessment

of structural components

NS-EN 1090-1

NS-EN 1090-1

Contents

1 Scope

2 Normative references

3 Terms, definitions and abbreviations

4 Requirements

5 Evaluation methods

6 Evaluation of conformity

7 Classification and designation

8 Marking

Annex A (informative) Guidelines for preparation of the component

specification

Annex B (normative) Assessment of factory production control

Annex ZA (informative) Clauses of this European Standard

Addressing the provisions of EU

CE marking of products

CE marking comprises all types of:

- Load bearing steel components and kits

- Unique components

Although fabricated steel components are generally

bespoke, being one-offs or to a limited number typically

of less than 10 identical items this may be series or non-

series production.

From 1. July 2014:

Mandatory in the EU and EFTA member countries

Definitions in NS-EN 1090-1

Component specification document or documents giving all necessary information and

technical requirements for manufacturing the structural component

Design brief documents containing all information necessary to perform a

structural design of the component, considering its intended use

Structural characteristics properties of the component connected with its ability to function

satisfactorily under the influence of the actions it is subject to (the performance characteristics are load bearing capacity, fatigue strength,

resistance to fire and deformation at serviceability limit state)

How to evaluate conformity?

EN 1090-1 specifies the performance characteristics

That shall be declared by the manufacturer or supplier

The general principles of evaluation of conformity is the

use of

- Initial Type Testing (ITT)

- Factory Production Control (FPC).

How evaluate conformity?

The basis of ITT is:

- A manufacturer develops a product (a prototype) to

demonstrate its properties in relation to the performance

characteristics.

- The manufacturer starts to produce the new product,

and representative samples from new production are tested to

determine that the production methods used can produce

consistent products.

Initial type testing (ITT)

ITT is needed

- at the start of production of a new product,

- the use of new constituent products

- at the start of a new or modified method of production

if this would affect a characteristic subject to evaluation

- if production is changed to a higher Execution Class.

Initial type testing (ITT)

Example:

- A manufacturer develop a preliminary welding procedure

specification (pWPS);

- Based on the pWPS, the manufacturer carries out a

welding procedure test, which is subjected to destructive

and nondestructive tests (NDT). The results are recorded in

a welding procedure qualification record (WPQR);

- The WPQR is used to support application of the WPS in

practice and the qualification of other WPS to be used in

production within a defined range of essential variables, e.g

material type/thickness, joint types, welding position etc.

- The WPS can be used in a variety of specific welds

which differs slightly from the initial type test.

- This is an example of the allowance in EN 1090-1 for

extended use of ITT to other situations within a "family".

- The range of qualification allowed in the welding

standards defines how big the family may be, which in

terms of parent materials is done using steel groups cited

in EN 1090-2 Table 14:

S235 to S355 (1.1, 1.2, 1.4)

S420 to S700 (1.3, 2, 3)

Initial type testing (ITT)

Factory production control, FPC

Factory production control (FPC) is needed to establish

that a manufacturer can produce conforming product in

regular ongoing production.

The FPC system shall consist of written procedures,

regular inspections and tests and/or assessments and

the use of results to control the component’s constituent

products, equipment, the production process and the

manufactured component.

A FPC system conforming to the requirements of EN ISO 9001

and made specific to the requirements of EN 1090-1 shall be

considered to satisfy the requirements.

The results of inspections, tests and assessments stated in the

manufacturer`s FPC system shall be recorded.

The action to be taken if control values or criteria are not met

shall be recorded and retained for the period specified in the

manufacturer’s FPC procedures.

The assessment of FPC shall be as Annex B.

Factory production control, FPC

Assessment of FPC

The tasks for the initial assessment are given in Table B.1

Tasks related to execution work

- General: Inspection and evaluation of execution resources

(premises, personnel and equipment), in particular:

- Evaluation of competence of personnel (and job descriptions)

- Inspection and evaluation of the control system for checking

conformity, and procedures for handling any nonconformity.

- Check that the factory and the welding plant meet the requirement

with regard to equipment (testing and calibration)

Assesment of tasks related to structural design work:

- General: Inspection and evaluation of design resources

(premises, personnel and equipment), in particular:

- Evaluation of competence of personnel (and job descriptions)

- Evaluation by samples that relevant equipment and resources

e.g. procedures for hand calculations and/or computer equipment

and computer programs for the work are available and functional.

- Evaluation of procedures for structural design including control

procedures to secure that conformity is obtained.

Assessment of FPC

Essential performance characteristics

Tolerances on dimensions

and shape

Durability

Weldability Load bearing capacity

Fracture toughness Fatigue strength

Reaction to fire Resistance to fire

Emission of radioactivity

and Release of cadmium.

Deformation at

serviceability limit state

The first 6 are material properties & geometrical data

(mandatory to declare)

The next 4 (blue text) are structural characteristics

Example: declaration of essential characteristics

Essential characteristics

Performance

Harmonised technical

specification

Tolerances on dimensions and shape EN 1090-2, tolerance class 1 EN 1090-1: 2009 + A1: 2011

Weldability EN 10025-2, S275JR & S355JR EN 1090-1: 2009 + A1: 2011

Fracture toughness/impact resistance S275JR & S355JR (27J @ 20C) EN 1090-1: 2009 + A1: 2011

Load bearing capacity NPD EN 1090-1: 2009 + A1: 2011

Fatigue strength NPD EN 1090-1: 2009 + A1: 2011

Resistance to fire NPD EN 1090-1: 2009 + A1: 2011

Reaction to fire Class A1 (steel only) EN 1090-1: 2009 + A1: 2011

Release of cadmium and its

compounds

NPD EN 1090-1: 2009 + A1: 2011

Radioactivity NPD EN 1090-1: 2009 + A1: 2011

Durability Surface preparation according to EN

1090-2, Preparation grade P3. Surface

painted according to EN ISO 12944.

EN 1090-1: 2009 + A1: 2011

Eksample:

Declaration of

Performance

The manufacturer or his authorised representative established

within the EEA is responsible for the affixing of

the CE marking.

The CE marking symbol affix shall be in accordance with

directive 93/68/EC and shall be shown on the component or

may be on the accompanying label, the packaging or on the

commercial documentation.

The CE marking consists

of the initials "CE" and

regulated information.

CE marking and labelling

Eksample: CE mark

Harmonised

standard

(hEN)

Description Available

date

Start

coexistens/

Start CE

marking

End

coexistens/

Mandatory

CE merking

EN 10025-1 Steel sections and plates Nov 2004 01/09/2005 01/09/2006

EN 10210-1 Hot finnished hollow

sections Apr 2006 01/02/2007 01/02/2008

EN 10219-1 Cold formed hollow sections Apr 2006 01/02/2007 01/02/2008

EN 14399-1 Preloadable bolts Mar 2005 01/01/2006 01/10/2007

EN 15048-1 Non-preloadable bolts Apr 2007 01/01/2008 01/10/2009

EN 1090-1 Fabricated structural

steelwork Oct 2009 01/01/2011 01/07/2014

Main harmonised steel product standards

How to ensure conformity of steel

• System 2+: system for production control FPC,

controlled by a Notified Body

• The Notified Body issues a certificate to the

manufacturer that gives the right to CE Mark

• The notified body carries out regular inspections to

confirm the certificate

The Notified Body checks the system, not the

component

It is the manufacturer's responsibility to deliver

components that conform to the declaration, which

refers to the component specification and standards.

NS-EN 1090-1

Intervals between inspections after the initial surveillance

Execution classes

Intervals between inspections

of manufacturer's FPC after

the ITT (years)

EXC1 and EXC2 1– 2 – 3 – 3

EXC3 and EXC4 1 – 1 – 2 – 3 – 3

The frequency of inspection may be increased if there is:

a) new or changed essential facilities;

b) change of responsible welding coordinator;

c) new welding processes, type of parent metal and the

associated welding procedure qualification record (WPQR);

d) new essential equipment.

CE marking, the process

Here is a procedure leading to CE marking:

A - Identify the Execution class(es) including steel materials

B - Identify the performance characteristics to be declared

C - Perform Initial Type Testing (and ev. ITC)

D - Establish a system for production control, FPC

E - Certification of FPC by a Notified Body.

F - Make a Declaration of Performance

G - Affixing the CE mark

Examples: FPC and Welding Certificate

Thank you

Any questions?