EN 1999-1-3:2023/prA1

Eurocode 9 - Design of aluminium structures - Part 1-3: Structures susceptible to fatigue

1.1 Scope of EN 1999-1-3
(1) This document gives the basis for the design of aluminium alloy structures subject to fatigue in the ultimate limit state.
(2) This document gives rules for:
- safe life design;
- damage tolerant design;
- design assisted by testing.
(3) This document does not cover pressurized containment vessels or pipework.
1.2 Assumptions
(1) The general assumptions of EN 1990 apply.
(2) The provisions of EN 1999-1-1 apply.
(3) EN 1999-1-3 is intended to be used in conjunction with EN 1990, EN 1991 (all parts), relevant parts in EN 1992 to EN 1999, EN 1090-1 and EN 1090-3 for requirements for execution, and ENs, EADs and ETAs for construction products relevant to aluminium structures.

Eurocode 9 - Bemessung und Konstruktion von Aluminiumtragwerken - Teil 1-3: Ermüdungsbeanspruchte Tragwerke

Eurocode 9 - Calcul des structures en aluminium - Partie 1-3 : Structures sensibles à la fatigue

Evrokod 9 - Projektiranje konstrukcij iz aluminijevih zlitin - 1-3. del: Konstrukcije, občutljive na utrujanje

1.1 Področje uporabe EN 1999-1-3
(1) Ta dokument podaja osnovo za projektiranje konstrukcij iz aluminijevih zlitin, ki so podvržene utrujanju v mejnih stanjih nosilnosti.
(2) Ta dokument podaja pravila za:
- projektiranje na podlagi varne življenjske dobe;
- projektiranje, odporno na poškodbe;
- projektiranje s pomočjo preskušanja.
(3) Ta dokument ne zajema tlačnih posod ali cevovodov.
1.2 Predpostavke
(1) Splošne predpostavke iz EN 1990 veljajo.
(2) Določbe iz EN 1999-1-1 veljajo.
(3) EN 1999-1-3 je namenjen uporabi v povezavi z EN 1990, EN 1991 (vsi deli), ustreznimi deli v EN 1992 do EN 1999, EN 1090-1 in EN 1090-3 za zahteve glede izvedbe ter z EN, EAD in ETA za gradbene proizvode, ki so pomembni za aluminijaste konstrukcije.

General Information

• Status: Not Published
• Publication Date: 01-Nov-2027
• ICS: 91.010.30 - Technical aspects
• Technical Committee: CEN/TC 250 - Structural Eurocodes
• Drafting Committee: CEN/TC 250/SC 9/WG 1 - Update and Simplification of all parts of EN 1999
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 26-Mar-2026
• Due Date: 31-Jan-2026
• Completion Date: 26-Mar-2026
• Ref Project: SIST EN 1999-1-3:2023/oprA1:2026 - Eurocode 9 - Design of aluminium structures - Part 1-3: Structures susceptible to fatigue

Relations

• Amends: EN 1999-1-3:2023 - Eurocode 9 - Design of aluminium structures - Part 1-3: Structures susceptible to fatigue
• Effective Date: 30-Jul-2025

Overview

EN 1999-1-3:2023/prA1, also known as Eurocode 9 – Design of aluminium structures – Part 1-3: Structures susceptible to fatigue, is a European standard developed under CEN/TC 250. This standard sets out the principles and requirements for the structural design of aluminium alloy structures that are subject to fatigue, specifically addressing the ultimate limit state. As the use of aluminium continues to expand in modern construction and engineering, following the provisions of EN 1999-1-3 helps ensure both safety and longevity for aluminium structures exposed to variable and repeated loading conditions.

Key Topics

EN 1999-1-3:2023/prA1 focuses on:

• Basis for Fatigue Design: Establishes the framework for fatigue verification in the ultimate limit state, critical for aluminium structures exposed to cyclic loading.
• Safe Life Design: Outlines methods for ensuring the structure’s performance remains unimpaired throughout its design life, without needing frequent inspections or monitoring for fatigue cracks.
• Damage Tolerant Design: Provides guidance on designing structures so that any cracks that do form have a low propagation rate and are detectable before posing a safety risk. This includes strategies for redundancy and crack-arrest features.
• Design Assisted by Testing: Recommends testing procedures to validate fatigue performance when analytical approaches are insufficient.
• Sources of Fatigue Loading: Identifies relevant actions based on EN 1991 (Actions on structures) and other applicable standards.
• Partial Factors for Fatigue Loads: Implements partial safety factors according to the most recent versions of associated Eurocode documents.
• Stress Concentration Factors: Addresses the impact of design details and geometries on fatigue performance, providing typical values for structural assessment.

Applications

EN 1999-1-3:2023/prA1 applies to a range of real-world engineering and construction scenarios, including:

• Bridges and Transport Infrastructure: Where aluminium’s lightweight properties are advantageous and fatigue due to repeated traffic loads is a concern.
• Building Structures: Particularly in roofs, facades, and floor systems subjected to cyclic environmental or occupancy-related loads.
• Industrial Buildings: Where machinery-induced vibrations and fluctuating loads can lead to fatigue cracks over time.
• Special Structures: Such as stadiums, exhibition halls, or airport terminals where long spans and lightweight construction benefit from aluminium alloys.

The safe life and damage tolerant approaches detailed in the standard are chosen based on the criticality of components and anticipated inspection regimes, balancing reliability with service-life considerations.

Related Standards

EN 1999-1-3:2023/prA1 is designed to be used in conjunction with a suite of European standards to ensure comprehensive and harmonized structural design:

• EN 1990 (Basis of structural and geotechnical design): Provides the overarching principles for all Eurocodes, including reliability management.
• EN 1991 (Actions on structures): Specifies loads relevant to fatigue assessment.
• EN 1999-1-1 (General rules for aluminium structures): Contains fundamental design rules for aluminium construction.
• EN 1090-1 and EN 1090-3: Cover execution and manufacturing requirements for aluminium structures.
• Other Eurocodes (EN 1992 to EN 1998): Provide cross-references for structures with mixed materials or specific design challenges.

Together, these standards provide a complete framework for the design, assessment, and execution of fatigue-susceptible aluminium structures in Europe, supporting safe, durable, and efficient construction in compliance with the latest technical requirements.

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Keywords: EN 1999-1-3, Eurocode 9, aluminium structures, fatigue design, safe life, damage tolerant design, structural reliability, CEN, structural engineering standards, partial safety factors, stress concentration, European construction standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2026
Evrokod 9 - Projektiranje konstrukcij iz aluminijevih zlitin - 1-3. del: Konstrukcije,
občutljive na utrujanje
Eurocode 9 - Design of aluminium structures - Part 1-3: Structures susceptible to fatigue
Eurocode 9 - Bemessung und Konstruktion von Aluminiumtragwerken - Teil 1-3:
Ermüdungsbeanspruchte Tragwerke
Eurocode 9 - Calcul des structures en aluminium - Partie 1-3 : Structures sensibles à la
fatigue
Ta slovenski standard je istoveten z: EN 1999-1-3:2023/prA1
ICS:
91.010.30 Tehnični vidiki Technical aspects
91.080.17 Aluminijaste konstrukcije Aluminium structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
EN 1999-1-3:2023
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
March 2026
ICS
English Version
Eurocode 9 - Design of aluminium structures - Part 1-3:
Structures susceptible to fatigue
Eurocode 9 - Calcul des structures en aluminium - Eurocode 9 - Bemessung und Konstruktion von
Partie 1-3 : Structures sensibles à la fatigue Aluminiumtragwerken - Teil 1-3:
Ermüdungsbeanspruchte Tragwerke
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 250.

This draft amendment A1, if approved, will modify the European Standard EN 1999-1-3:2023. If this draft becomes an
amendment, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
inclusion of this amendment into the relevant national standard without any alteration.

This draft amendment was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1999-1-3:2023/prA1:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Modifications throughout the whole document . 4
2 Modification to 0.1, “Introduction to the Eurocodes” . 4
3 Modification to 0.2, “Introduction of EN 1999 (all parts)” . 4
4 Modification to 1.1, “Scope of EN 1999-1-3” . 4
5 Modification to Clause 2, “Normative references” . 4
6 Modifications to 4.2.1, “Safe life design (SLD)”. 5
7 Modification to 4.2.2, “Damage tolerant design (DTD)”. 5
8 Modification to 4.3.1, “Sources of fatigue loading” . 5
9 Modification to 4.4, “Partial factors for fatigue loads” . 5
10 Modification to D.4, “Stress concentration factors” . 6
11 Modification to E.2, “Scope and field of application” . 6

European foreword
This document (EN 1999-1-3:2023/prA1:2026) has been prepared by Technical Committee CEN/TC 250
“Structural Eurocodes”, the secretariat of which is held by BSI. CEN/TC 250 is responsible for all
Structural Eurocodes and has been assigned responsibility for structural and geotechnical design matters
by CEN.
This document is currently submitted to the CEN Enquiry.
The first generation of EN Eurocodes was published between 2002 and 2007. This document forms part
of the second generation of the Eurocodes, which have been prepared under Mandate M/515 i
...