EN 1993-1-4:2025/prA1

SLOVENSKI STANDARD
01-julij-2026
Evrokod 3 - Projektiranje jeklenih konstrukcij - 1-4. del: Nerjavne jeklene
konstrukcije
Eurocode 3 - Design of steel structures - Part 1-4: Stainless steel structures
Eurocode 3 - Bemessung und Konstruktion von Stahlbauten - Teil 1-4: Tragwerke aus
nichtrostenden Stählen
Eurocode 3 - Calcul des structures en acier - Partie 1-4 : Structures en aciers
inoxydables
Ta slovenski standard je istoveten z: EN 1993-1-4:2025/prA1
ICS:
77.140.20 Visokokakovostna jekla Stainless steels
91.010.30 Tehnični vidiki Technical aspects
91.080.13 Jeklene konstrukcije Steel structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
EN 1993-1-4:2025
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
May 2026
ICS 91.010.30; 91.080.13
English Version
Eurocode 3 - Design of steel structures - Part 1-4: Stainless
steel structures
Eurocode 3 - Calcul des structures en acier - Partie 1-4 : Eurocode 3 - Bemessung und Konstruktion von
Structures en aciers inoxydables Stahlbauten - Teil 1-4: Tragwerke aus nichtrostenden
Stählen
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 1993-1-4:2025. 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 1993-1-4:2025/prA1:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Modifications throughout the whole document . 4
2 Modifications to the Introduction . 4
3 Modifications to Clause 3, “Terms, definitions and symbols” . 5
4 Modifications to Clause 5, “Materials” . 5
5 Modifications to Clause 7, “Structural analysis” . 5
6 Modifications to Clause 8, “Ultimate limit states” . 6
7 Modifications to Clause 10, “Connection design” . 6

8 Modification to Annex A, “Selection of materials and durability” . 6
European foreword
This document (EN 1993-1-4:2025/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.
This document will amend EN 1993-1-4:2025.
NOTE Some modifications are purely editorial corrections to improve the quality of the document and these will
not be tagged in the consolidated publication, as noted after the modification.
The following main changes to EN 1993-1-4:2025 are included in the amendment:
— clarification of the definition of λ in consideration of second order effects (7.2.1) and replacement
of λ with λ in the calculation of the amplitude of the imperfection in elastic critical buckling
0 0m
modes (7.3.2);
— addition of a NDP for the value of η for use in determining the shear buckling resistance;
— permission to use preload levels up to 0,7 fA ;
ub s
— requirements for how to classify a new stainless steel grade in a corrosion resistance class according
to Table A.3.
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 issued to
CEN by the European Commission and the European Free Trade Association.
The Eurocodes have been drafted to be used in conjunction with relevant execution, material, product
and test standards, and to identify requirements for execution, materials, products and testing that are
relied upon by the Eurocodes.
The Eurocodes recognize the responsibility of each Member State and have safeguarded their right to
determine values related to regulatory safety matters at national level through the use of National
Annexes.
1 Modifications throughout the whole document
Add “-1:2023+A1:2026” to the reference “EN 1990” in Clause 2 and update throughout the text when a
dated reference is given.
Add part number “-1” to the reference “EN 1990” and update throughout the text when an undated reference
is given.
Remove “Fpr” from “FprEN 1993-1-14:2025” throughout the whole document and from “FprEN 1993-1-4”
in the title of 1.1.
2 Modifications to the Introduction
In 0.1, replace “— New parts are under development, e.g. Eurocode for design of structural glass”
with “— EN 19100 Eurocode 10 — Design of glass structures”.
In 0.1, add the following new list item: “— New parts are under development, e.g. Eurocode for design of
fibre-polymer composite structures and for design of tensioned membrane structure
...