CEN/TC 250/SC 1/WG 1 - Climatic actions

EN 1991-1-4 gives principles and rules for the determination of natural wind actions for the structural design of building and civil engineering works for each of the loaded areas under consideration. This includes the whole structure or parts of the structure or elements attached to the structure, e.g. components, cladding units and their fixings, safety and noise barriers.
This part is applicable to:
- buildings and civil engineering works with heights up to 300m;
- bridges having no span greater than 200m.
This part is intended to predict characteristic wind actions on land-based structures, their components and appendages.
This part is also applicable to structures less than 1km offshore from the main coastline. For offshore structures more than 1km from the main coastline, the terrain effects defined in this part do not apply.

1.1   Scope of EN 1991-1-3
(1) EN 1991-1-3 gives principles and rules to determine the values of loads due to snow to be used for the structural design of buildings and civil engineering works.
(2) This document does not apply to sites at altitudes above 1 500 m, unless otherwise specified.
NOTE   For rules for the treatment of snow loads for altitudes above 1 500 m, see 6.1.
(3) This document does not give guidance on specialist aspects of snow loading, for example:
-   impact snow loads resulting from snow sliding off or falling from a higher roof;
-   changes in shape or size of the construction works due to the presence of snow or the accretion of ice which could affect the wind action;
-   loads in areas where snow is present all year round;
-   lateral loading due to snow creep (e.g. lateral loads exerted by drifts);
-   loads due to artificial snow.
1.2   Assumptions
The assumptions given in EN 1990:2023, 1.2 apply.

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 1999 (all parts) for the design of structures.