EN 1991-1-5:2025/prA1
(Amendment)Eurocode 1 - Actions on structures - Part 1-5: Thermal actions
General Information
- Abstract
1.1 Scope of EN 1991-1-5
(1) EN 1991-1-5 gives principles and rules for calculating thermal actions on buildings, bridges and other structures including their structural members. Principles needed for cladding and other attachments of buildings are also provided.
(2) This document describes the changes in the temperature of structural members. Characteristic values of thermal actions are presented for use in the design of structures which are exposed to daily and seasonal climatic changes.
(3) This document also gives principles for changes in the temperature of structural members due to the paving of hot asphalt on bridge decks.
(4) This document also provides principles and rules for thermal actions acting in structures which are mainly a function of their use (e.g. cooling towers, silos, tanks, warm and cold storage facilities, hot and cold services, etc.).
NOTE Supplementary guidance for thermal actions on chimneys is provided in EN 13084-1.
1.2 Assumptions
(1) The assumptions given in EN 1990:2023, 1.2 apply.
(2) EN 1991 1 5 is intended to be used with EN 1990, the other parts of EN 1991 and EN 1992 (all parts) to EN 1999 (all parts) for the design of structures.
- Status
- Not Published
- Publication Date
- 09-Feb-2028
- Technical Committee
- CEN/TC 250 - Structural Eurocodes
- Drafting Committee
- CEN/TC 250/SC 1/WG 1 - Climatic actions
- Current Stage
- 4060 - Closure of enquiry - Enquiry
- Start Date
- 23-Jul-2026
- Due Date
- 17-Dec-2026
- Completion Date
- 23-Jul-2026
Overview
EN 1991-1-5:2025/prA1, part of the Eurocode 1 series developed by CEN (European Committee for Standardization), specifies principles and rules for calculating thermal actions on structures. This standard addresses the impact of temperature variations on buildings, bridges, and other structures, providing methodologies that ensure safety and durability throughout their lifecycle. With regular climatic changes, paving processes, and usage-specific conditions affecting structures, the standard is crucial for structural engineers and designers across Europe.
This amendment introduces editorial and technical updates to improve clarity, references, and coverage in the application of thermal load calculations. EN 1991-1-5:2025/prA1 is a key reference for complying with European structural performance requirements and complements other Eurocodes in integrated structural design.
Key Topics
- Thermal Actions and Their Effects:
- Principles for assessing temperature changes on structural members, including daily and seasonal climatic influences.
- Rules for designing structural elements exposed to variable and extreme temperature fluctuations.
- Structures and Attachments:
- Guidelines for addressing thermal effects not only on primary structural components but also on cladding systems and other attachments essential to building envelopes.
- Specific Applications:
- Criteria for thermal actions induced by the paving of hot asphalt on bridge decks.
- Provisions for temperature changes related to structures with process-related thermal conditions, such as cooling towers, silos, tanks, and storage facilities (both hot and cold).
- Reference Updates and Editorial Improvements:
- Updated citations to related standards (e.g., EN 1990-1:2023+A1:2026) for improved alignment and usability.
- Editorial modifications to mathematical notation and terminology for consistency across the Eurocode suite.
Applications
EN 1991-1-5:2025/prA1 serves as an authoritative guideline for professionals involved in the planning, design, and assessment of buildings and civil engineering works impacted by thermal actions. Its practical applications include:
- Building Design: Ensuring the safe performance of buildings under daily and seasonal temperature regimes.
- Bridge Engineering: Evaluating and mitigating the effects of temperature changes due to both environmental conditions and construction processes, such as asphalt paving.
- Industrial Structures: Designing facilities subject to artificial heating or cooling processes, ensuring that tanks, silos, storage facilities, and utility infrastructure maintain structural integrity.
- Cladding and Attachments: Providing designers with methods for calculating temperature-induced influences on non-structural systems attached to primary frameworks.
The standard is intended to be used in combination with EN 1990 (Basis of structural and geotechnical design) and other structural Eurocodes (from EN 1992 to EN 1999), ensuring a comprehensive and integrated approach to structural safety across multiple load types.
Related Standards
- EN 1990-1:2023+A1:2026 – Basis of structural and geotechnical design – Part 1: New structures
- EN 1992 to EN 1999 – Eurocodes covering concrete, steel, composite, timber, masonry, aluminum, and other specific materials and structural forms
- EN 13084-1 – Guidance for thermal actions specific to chimneys
- EN 1998 (all parts) – Seismic design, providing complementary requirements outside the scope of thermal actions
- EN 19100 (Eurocode 10) – Design guidelines for glass structures (referenced for upcoming related standards)
EN 1991-1-5:2025/prA1 reinforces building safety by delivering harmonized European methods for assessing and designing against thermal actions, supporting both compliance and innovation in the construction sector.
Relations
- Effective Date
- 05-Nov-2025
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Frequently Asked Questions
EN 1991-1-5:2025/prA1 is a draft published by the European Committee for Standardization (CEN). Its full title is "Eurocode 1 - Actions on structures - Part 1-5: Thermal actions". This standard covers: 1.1 Scope of EN 1991-1-5 (1) EN 1991-1-5 gives principles and rules for calculating thermal actions on buildings, bridges and other structures including their structural members. Principles needed for cladding and other attachments of buildings are also provided. (2) This document describes the changes in the temperature of structural members. Characteristic values of thermal actions are presented for use in the design of structures which are exposed to daily and seasonal climatic changes. (3) This document also gives principles for changes in the temperature of structural members due to the paving of hot asphalt on bridge decks. (4) This document also provides principles and rules for thermal actions acting in structures which are mainly a function of their use (e.g. cooling towers, silos, tanks, warm and cold storage facilities, hot and cold services, etc.). NOTE Supplementary guidance for thermal actions on chimneys is provided in EN 13084-1. 1.2 Assumptions (1) The assumptions given in EN 1990:2023, 1.2 apply. (2) EN 1991 1 5 is intended to be used with EN 1990, the other parts of EN 1991 and EN 1992 (all parts) to EN 1999 (all parts) for the design of structures.
1.1 Scope of EN 1991-1-5 (1) EN 1991-1-5 gives principles and rules for calculating thermal actions on buildings, bridges and other structures including their structural members. Principles needed for cladding and other attachments of buildings are also provided. (2) This document describes the changes in the temperature of structural members. Characteristic values of thermal actions are presented for use in the design of structures which are exposed to daily and seasonal climatic changes. (3) This document also gives principles for changes in the temperature of structural members due to the paving of hot asphalt on bridge decks. (4) This document also provides principles and rules for thermal actions acting in structures which are mainly a function of their use (e.g. cooling towers, silos, tanks, warm and cold storage facilities, hot and cold services, etc.). NOTE Supplementary guidance for thermal actions on chimneys is provided in EN 13084-1. 1.2 Assumptions (1) The assumptions given in EN 1990:2023, 1.2 apply. (2) EN 1991 1 5 is intended to be used with EN 1990, the other parts of EN 1991 and EN 1992 (all parts) to EN 1999 (all parts) for the design of structures.
EN 1991-1-5:2025/prA1 is classified under the following ICS (International Classification for Standards) categories: 91.010.30 - Technical aspects. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 1991-1-5:2025/prA1 has the following relationships with other standards: It is inter standard links to EN 1991-1-5:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 1991-1-5:2025/prA1 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2026
Evrokod 1 - Vplivi na konstrukcije - 1-5. del: Toplotni vplivi
Eurocode 1 - Actions on structures - Part 1-5: Thermal actions
Eurocode 1 - Einwirkungen auf Tragwerke - Teil 1-5: Temperatureinwirkungen
Eurocode 1 - Actions sur les structures - Partie 1-5 : Actions thermiques
Ta slovenski standard je istoveten z: EN 1991-1-5:2025/prA1
ICS:
91.010.30 Tehnični vidiki Technical aspects
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
EN 1991-1-5:2025
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
April 2026
ICS 91.010.30
English Version
Eurocode 1 - Actions on structures - Part 1-5: Thermal
actions
Eurocode 1 - Actions sur les structures - Partie 1-5 : Eurocode 1 - Einwirkungen auf Tragwerke - Teil 1-5:
Actions thermiques Temperatureinwirkungen
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 1991-1-5:2025. 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 1991-1-5:2025/prA1:2026 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Modifications throughout the whole document . 4
2 Modification to the Introduction . 4
3 Modification
...