EN 1993-1-2:2024/prA1

• Abstract:

  1.1 Scope of prEN 1993-1-2; (1) This document provides rules for the design of steel structures for the accidental situation of fire exposure. This Part of EN 1993 only identifies differences from, or supplements to, normal temperature design.; (2) This document applies to steel structures required to fulfil a loadbearing function.; (3) This document does not include rules for separating function.; (4) This document gives principles and application rules for the design of structures for specified requirements in respect of the aforementioned function and the levels of performance.; (5) This document applies to structures, or parts of structures, that are within the scope of EN 1993 1 1 and are designed accordingly.; (6) This document is intended to be used in conjunction with EN 1991-1-2, EN 1993-1-1, EN 1993 1-3, EN 1993-1-4, EN 1993-1-5, EN 1993-1-6, EN 1993-1-7, EN 1993-1-8, EN 1993-1-11, EN 1993-1-13 or EN 1993-1-14.; 1.2 Assumptions; (1) Unless specifically stated, EN 1990, EN 1991(all parts) and EN 1993-1-1 apply.; (2) The design methods given in prEN 1993-1-2 are applicable if; - the execution quality is as specified in EN 1090-2 and/or EN 1090-4, and; - the construction materials and products used are as specified in prEN 1993-1-1:2020, Table 5.1 and Table 5.2 and in prEN 1993-1-3:2022, Table 5.1 and Table 5.2, or in the relevant material and product specifications.; (3) In addition to the general assumptions of EN 1990 the following assumptions apply: ; - the choice of the relevant design fire scenario is made by appropriate qualified and experienced personnel, or is given by the relevant national regulation;; - any fire protection measure taken into account in the design will be adequately maintained.

• Status: Not Published
• Publication Date: 09-Feb-2028
• ICS: 13.220.50 - Fire-resistance of building materials and elements
• ICS: 91.010.30 - Technical aspects
• ICS: 91.080.13 - Steel structures
• Technical Committee: CEN/TC 250 - Structural Eurocodes
• Drafting Committee: CEN/TC 250/SC 3/WG 2 - Evolution of EN 1993-1-2 - Fire
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 16-Jul-2026
• Due Date: 17-Dec-2026
• Completion Date: 16-Jul-2026
• Ref Project: SIST EN 1993-1-2:2024/oprA1:2026 - Eurocode 3 - Design of steel structures - Part 1-2: Structural fire design

• Amends: EN 1993-1-2:2024 - Eurocode 3 - Design of steel structures - Part 1-2: Structural fire design
• Effective Date: 05-Nov-2025

Overview

EN 1993-1-2:2024/prA1 is a key draft amendment to Eurocode 3, the European standard for the design of steel structures, focusing specifically on structural fire design. Developed by the European Committee for Standardization (CEN), this standard specifies rules for the design of steel structures in the accidental situation of fire exposure. EN 1993-1-2:2024/prA1 addresses essential differences from normal temperature design, providing design principles and application rules for loadbearing steel structures required to fulfill specified fire performance requirements.

This standard is applicable to parts of structures within the scope of EN 1993-1-1 and intended to be used alongside other related Eurocodes, ensuring consistency in the safety, reliability, and performance of steel structures under fire conditions.

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Key Topics

• Scope of Structural Fire Design
  EN 1993-1-2:2024/prA1 sets out specific provisions for steel structures exposed to fire, covering the design of loadbearing components but excluding requirements for separating functions.

• Modifications & Updates
  This amendment introduces editorial and technical changes, such as updated terminology, reference alignments with other Eurocodes, and revised material property considerations for high-strength steels under physically-based fire scenarios.

• Design Assumptions
  The standard assumes construction quality meets EN 1090-2/EN 1090-4 and uses materials as specified in associated tables of EN 1993-1-1 and EN 1993-1-3. Appropriate selection and maintenance of fire protection measures, and involvement of qualified personnel in choosing fire scenarios are fundamental.

• Material Properties at Elevated Temperatures
  Detailed provisions are introduced regarding the mechanical properties of steels, especially for grades higher than S500, and their behavior during heating and cooling phases of fire exposure.

• Design Methods
  The document refines simplified and advanced design methods, ensuring accurate application of reduction factors, equations, and validation criteria for fire resistance assessments.

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Applications

EN 1993-1-2:2024/prA1 has wide applicability in the field of civil and structural engineering, especially for projects where the fire-resistance of steel structures is a critical concern:

• Commercial and Industrial Buildings
  Ensuring that steel frames, beams, and columns maintain structural integrity in the event of fire, minimizing collapse risks.

• Infrastructure Projects
  Application in bridges and facilities where fire exposure could impact safety and serviceability.

• High-strength Steel Applications
  Addressing the behavior of advanced steel grades under fire scenarios, which is increasingly relevant in modern, high-performance buildings.

• Regulatory Compliance
  Supporting designers in meeting national and European fire safety requirements, forming a basis for risk assessments and building approvals.

• Integration with Fire Protection Systems
  Providing guidance for the effective use and maintenance of fire protection measures, such as coatings or encasements, that contribute to overall building safety.

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Related Standards

Implementing EN 1993-1-2:2024/prA1 involves coordination with several related Eurocodes and standards:

• EN 1993-1-1: General rules and application for steel structures
• EN 1991-1-2: Actions on structures exposed to fire
• EN 1090-2/EN 1090-4: Execution of steel structures and components
• EN 1993-1-3 to EN 1993-1-14: Specialized parts of Eurocode 3, such as cold-formed members, stainless steel structures, joints, and finite element analysis
• EN 1990-1: Basis of structural and geotechnical design

Compliance with these interconnected standards ensures a consistent approach to fire-resistant steel structure design across Europe.

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By following EN 1993-1-2:2024/prA1, designers and engineers ensure that steel structures deliver robust fire performance, support regulatory compliance, and contribute to the safety and durability of modern buildings and infrastructure.

SLOVENSKI STANDARD
01-junij-2026
Evrokod 3 - Projektiranje jeklenih konstrukcij - 1-2. del: Požarno projektiranje
konstrukcij
Eurocode 3 - Design of steel structures - Part 1-2: Structural fire design
Eurocode 3 - Bemessung und Konstruktion von Stahlbauten - Teil 1-2:
Tragwerksbemessung für den Brandfall
Eurocode 3 - Calcul des structures en acier - Partie 1-2 : Calcul du comportement au feu
Ta slovenski standard je istoveten z: EN 1993-1-2:2024/prA1
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
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 1993-1-2:2024
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
April 2026
ICS 13.220.50; 91.010.30; 91.080.13
English Version
Eurocode 3 - Design of steel structures - Part 1-2:
Structural fire design
Eurocode 3 - Calcul des structures en acier - Partie 1-2 : Eurocode 3 - Bemessung und Konstruktion von
Calcul du comportement au feu Stahlbauten - Teil 1-2: Tragwerksbemessung für den
Brandfall
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 1993-1-2:2024. 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 1993-1-2:2024/prA1:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Modification throughout the whole document . 4
2 Modifications to the Introduction . 4
3 Modifications to Clause 2, “Normative references” . 5
4 Modification to Clause 3, "Terms, definitions and symbols" . 5
5 Modifications to Clause 4, "Basis of design" . 6
6 Modifications to Clause 5, " Material properties" . 6
7 Modifications to Clause 7, "Simplified design methods" . 7
8 Modification to Clause 8, "Advanced design methods" . 7
9 Modifications to Annex C (normative), “Stainless steels” . 7
European foreword
This document (EN 1993-1-2:2024/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 1993-1-2:2024.
The following main changes to EN 1993-1-2:2024 are included in the amendment:
— editorial modifications in Clause 7 and Annex C;
— technical modification in Clause 5 concerning mechanical properties of high-strength steels in
physically based fire scenarios.
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 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 Modification throughout the whole document
Replace “EN 1990” with “EN 1990-1” throughout the text.
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”.
Add the following new list item: “— New parts are under development, e.g. Eurocode for design of fibre-
polymer composite structures and design of tensioned membrane structures”.
In 0.2, in the first paragraph, replace the reference to “EN 1990 — Basis of structural and geotechnical
design” with “EN 1990-1 — Basis of structural and geotechnical design — Part 1: New structures”.
Replace the list of the various parts of EN 1993 with:
“EN 1993-1-1, Eurocode 3 — Design of Steel Structures — Part 1-1: General rules and rules for buildings;
EN 1993-1-
...