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

(1) EN 1991-3 defines actions imposed by cranes and other machines including dynamic effects, if
relevant, for the structural design of crane or machine supporting structures.
(2) EN 1991-3 provides guidance on crane classification in terms of dynamic factors and fatigue actions.
(3) EN 1991-3 applies to supporting structures of
− bridge, gantry and wall cranes travelling on fixed runways;
− fixed machines that cause a harmonic dynamic loading on fixed supporting structures.
(4) The principles provided in EN 1991-3 can be applied also to determine actions on supporting
structures of cranes other than those referred to in (3).
(5) EN 1991-3 does not provide partial factors for actions.
NOTE For partial factors for actions, see Annex A.5 to EN 1990:2023+prA1:2024.
(6) EN 1991-3 does not provide actions or provisions for the design of cranes and machines.

(1) EN 1991-1-7 provides actions and rules for safeguarding buildings and civil engineering works against identifiable accidental actions.
NOTE 1   Identifiable accidental actions include impact from vehicles and internal explosions.
NOTE 2   Rules on impact from vehicles travelling on a bridge deck are given in EN 1991-2.
(2) EN 1991-1-7 also covers: actions and rules for tying systems and key members; information on risk assessment; dynamic design for impact; actions for internal explosions; actions from debris.
(3) Actions from ship operations such as berthing and mooring are outside the scope of this document.
(4) Actions due to high explosives that detonate are outside the scope of this document.

1.1   Scope of prEN 1991-1-6
(1) prEN 1991-1-6 provides guidance and general rules on the determination of actions relevant for the design of buildings and civil engineering works, including geotechnical structures, for their execution stage.
NOTE   Actions for design during execution include those that only arise from execution activities and act during execution, termed construction actions (for example personnel and hand tools, auxiliary structures, equipment and elements used during execution), and others that are present during the service life of the completed structure (for example self-weight, wind, etc.) but which can act differently and/or have different values during execution.
(2) prEN 1991-1-6 provides guidance and general rules for the determination of actions for the design of auxiliary structures, elements and equipment used during execution in case they are designed to the Eurocodes and not to other European Standards.
NOTE   Other European Standards (e.g. EN 12810, EN 12811, EN 12812) provide specific rules for certain types of auxiliary structures, equipment and elements used during execution.
(3) prEN 1991-1-6 gives rules for buildings and bridges during execution to supplement the provisions in EN 1990.
NOTE   For combination rules for execution, see EN 1990.
1.2   Assumptions
(1) The general assumptions given in EN 1990 apply.
(2) The application of this document follows the limit state principle and is based on the partial factor method, unless explicitly prescribed differently.
(3) The verification of buildings and civil engineering structures in transient design situations is undertaken in accordance with the Eurocodes, accounting for the interaction with any auxiliary structures, elements and/or equipment.
(4) When using European product standards covering auxiliary structures, equipment and elements used during execution, it is assumed that the design basis, design requirements and, if provided, the safety and operational design limits specified in these product standards are taken into account.
(5) Adequate planning, documentation, communication, control and supervision are provided during execution, involving all relevant parties.
NOTE   Execution of a structure can involve interaction between several parties from diverse engineering fields, responsible for the design, fabrication, transportation and execution of different subsystems used during the execution of a structure.

1.1   Scope of EN 1991-1-1
(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.