EN 1991-1-1:2025/prA1

• Abstract:

  (1) EN 1991-1-1 gives rules on the following aspects related to actions, which are relevant to the structural design of buildings and civil engineering works including some geotechnical aspects:; - specific weight of construction materials and stored materials;; - self-weight of construction works;; - imposed loads for buildings.; (2) Mean values for specific weight of specific construction materials, additional materials for bridges, stored materials and products are given. In addition, for specific materials and products the angle of repose is provided.; (3) Methods for the assessment of the characteristic values of self-weight of construction works are given.; (4) Characteristic values of imposed loads are given for the following areas in buildings according to the category of use:; - residential, social, commercial and administration areas;; - areas for archive, storage and industrial activities;; - garage and vehicle traffic areas (excluding bridges);; - roofs;; - stairs and landings;; - terraces and balconies.; NOTE The loads on traffic areas given in this standard refer to vehicles up to a gross vehicle weight of 160 kN. Further information can be obtained from EN 1991-2.; (5) Characteristic values of horizontal imposed loads on parapets and partition walls acting as barriers are provided.; NOTE Forces due to vehicle impact are specified in EN 1991-1-7 and EN 1991-2.; 1.2 Assumptions; (1) The general assumptions of EN 1990 apply.; (2) EN 1991-1-1 is intended to be used with EN 1990, the other parts of EN 1991 and the other Eurocode parts for the design of structures.

• Status: Not Published
• Publication Date: 09-Feb-2028
• ICS: 91.010.30 - Technical aspects
• Technical Committee: CEN/TC 250 - Structural Eurocodes
• Drafting Committee: CEN/TC 250/SC 1/WG 7 - Evolution of EN 1991-1-1, EN 1991-1-6, EN 1991-1-7 and EN 1991-3
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 23-Jul-2026
• Due Date: 17-Dec-2026
• Completion Date: 23-Jul-2026
• Ref Project: SIST EN 1991-1-1:2025/oprA1:2026 - Eurocode 1 - Actions on structures - Part 1-1: Specific weight of materials, self-weight of construction works and imposed loads for buildings

• Amends: EN 1991-1-1:2025 - Eurocode 1 - Actions on structures - Part 1-1: Specific weight of materials, self-weight of construction works and imposed loads for buildings
• Effective Date: 05-Nov-2025

Overview

EN 1991-1-1:2025/prA1, developed by CEN, is a draft amendment to Eurocode 1 - Actions on Structures, specifically Part 1-1, which addresses the determination of the specific weight of materials, self-weight of construction works, and imposed loads for buildings. This standard is essential for professionals involved in structural design and civil engineering, providing key guidance for calculating loads that directly affect building safety, durability, and regulatory compliance. EN 1991-1-1 forms a core reference for both new construction and renovations, ensuring structural reliability across varied building uses.

Key Topics

• Specific Weight of Materials

  • Provides mean values for the specific weight of construction and stored materials, with supplementary data for bridges and various products.
  • Includes the angle of repose for certain materials to assist in geotechnical assessments.

• Self-weight of Structures

  • Outlines standard methods to assess the self-weight (dead load) of buildings and construction works, crucial for foundational design and stability analysis.

• Imposed Loads for Buildings

  • Defines characteristic values of imposed loads based on building use:
    • Residential, commercial, administration areas
    • Archive, storage, and industrial zones
    • Garages and vehicle access areas (excluding bridges)
    • Roofs, stairs, landings, terraces, and balconies
  • Characteristic horizontal loads on parapets and partition walls that act as barriers are also detailed.

• Standard Modifications

  • Updates references and terminology for consistency with the latest Eurocode framework.
  • Clarifies the inclusion of terraces alongside roofs and refines definitions for balconies within load tables.

Applications

EN 1991-1-1:2025/prA1 is vital in multiple aspects of structural engineering and construction:

• Structural Design Calculations
  • Supplies standardized values for material weights and imposed loads, forming the basis for load-bearing calculations, foundation sizing, and safety evaluations.
• Compliance and Regulations
  • Ensures building designs meet both European and national safety requirements. National annexes allow for country-specific adaptation of certain values.
• Design of Diverse Building Types
  • Applicable across residential blocks, commercial properties, warehouses, parking structures, and areas involving mixed uses.
• Support for Geotechnical Assessment
  • The angle of repose and specific material weights aid in the physical stability analysis of stored materials and earthworks.
• Barrier and Partition Design
  • Includes parameters for horizontal imposed loads, guiding the engineering of parapets, partitions, and similar protective barriers.

Related Standards

To ensure comprehensive structural safety and compliance, EN 1991-1-1:2025/prA1 should be used together with related Eurocode standards, including:

• EN 1990-1:2023+A1:2026 – Basis of structural and geotechnical design
• EN 1991-2 – Actions on structures - Part 2: Traffic loads on bridges
• EN 1991-1-7 – Actions on structures - Part 1-7: Accidental actions (including vehicle impact)
• EN 1998 (all parts) – Eurocode for seismic design requirements

These complementary standards cover areas such as traffic loads, accidental impacts, and seismic actions, providing a robust, integrated framework for safe and sustainable building design in Europe.

Eurocode 1 and its amendments, such as EN 1991-1-1:2025/prA1, are essential references for modern engineering, supporting uniform safety, quality, and interoperability across the European construction industry.

SLOVENSKI STANDARD
01-junij-2026
Evrokod 1 - Vplivi na konstrukcije - 1-1. del: Specifična teža materialov, lastna teža
konstrukcijskih del in koristne obtežbe stavb
Eurocode 1 - Actions on structures - Part 1-1: Specific weight of materials, self-weight of
construction works and imposed loads for buildings
Eurocode 1 - Einwirkungen auf Tragwerke - Teil 1-1: Wichte von Baustoffen und
Lagergütern, Eigengewicht von Bauwerken und Nutzlasten im Hochbau
Eurocode 1 - Actions sur les structures - Partie 1-1 : Poids volumiques des matériaux,
poids propre des ouvrages de construction et charges d’exploitation applicables aux
bâtiments
Ta slovenski standard je istoveten z: EN 1991-1-1:2025/prA1
ICS:
91.010.30 Tehnični vidiki Technical aspects
91.040.01 Stavbe na splošno Buildings in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
EN 1991-1-1:2025
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
April 2026
ICS 91.010.30
English Version
Eurocode 1 - Actions on structures - Part 1-1: Specific
weight of materials, self-weight of construction works and
imposed loads for buildings
Eurocode 1 - Actions sur les structures - Partie 1-1 : Eurocode 1 - Einwirkungen auf Tragwerke - Teil 1-1:
Poids volumiques des matériaux, poids propre des Wichte von Baustoffen und Lagergütern, Eigengewicht
ouvrages de construction et charges d'exploitation von Bauwerken und Nutzlasten im Hochbau
applicables aux bâtiments
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 1991-1-1:2025. 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 1991-1-1:2025/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 to Clause 1, “Scope” . 4
4 Modification to Clause 2, “Normative References” .
...