This is a Norwegian Prestandard
The Norwegian Prestandard SN-EN 1991-1-9:2025 represents a second-generation Eurocode. Prestandards (SN-EN) for second-generation Eurocodes are published to provide the industry with an opportunity to familiarize itself with the content. These prestandards do not replace the first-generation Eurocodes.
Read more about Norwegian Prestandard
Follow this link for the valid version of NS-EN 1991.
In Norway, all second-generation Eurocodes will be published collectively as Norwegian Standards (NS-EN) along with corresponding national annexes. All first-generation Eurocodes with national annexes will remain valid Norwegian standards until then and will be withdrawn simultaneously with the publication of the second-generation Eurocodes.
Abstract
1.1 Scope of EN 1991-1-9(1) EN 1991 1 9 gives principles and rules to determine the values of loads due to atmospheric icing to be used for following types of structures:- masts;- towers;- antennas and antenna structures;- cables, stays, guy ropes and similar structures;- rope ways (cable railways);- structures for ski-lifts;- buildings or parts of them exposed to potential icing;- special types of structures, such as towers for transmission lines and wind turbines.NOTE Atmospheric icing on electrical overhead lines is covered by EN 50341-1.(2) EN 1991-1-9 specifies values for:- dimensions and weight of accreted ice;- shapes of accreted ice.(3) EN 1991-1-9 covers types of icing, ice loads acting on structures, and falling ice considerations.NOTE For wind actions on iced structures, see EN 1991-1-4.1.2 AssumptionsThe assumptions given in EN 1990:2023, 1.2 apply.EN 1991-1-9 is intended to be used with EN 1990 (all parts), the other parts of EN 1991 and EN 1992 (all parts) to EN 1999 (all parts) for the design of structures.
