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BSI 23/30457255 DC 2023

BSI 23/30457255 DC 2023

$13.70

BS EN 1991-1-9. Eurocode 1. Actions on structures – Part 1-9. General actions. Atmospheric icing

Published By Publication Date Number of Pages
BSI 2023 31
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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, etc., – rope ways (cable railways), – structures for ski-lifts, – buildings or parts of them exposed to potential icing, – towers for special types of construction such as for example 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 cover types of icing, ice loads acting on structures, and falling ice considerations. NOTE Wind actions on iced structures are covered by EN 1991-1-4. 1.2 Assumptions The assumptions given in FprEN 1990:2022, 1.2 apply to EN 1991-1-9.

PDF Catalog

PDF Pages PDF Title
10 1 Scope
1.1 Scope of EN 199119
1.2 Assumptions
2 Normative references
11 3 Terms, definitions and symbols
3.1 Terms and definitions
12 3.2 Symbols and abbreviations
3.2.1 Latin upper case letters
13 3.2.2 Latin lower case letters
3.2.3 Greek lower-case letters
4 Design situations
5 Classification of actions
14 6 Ice load on structures
6.1 Basic values
15 6.2 Ice classes and characteristic values of glaze and rime
6.3 Glaze
16 6.4 Rime
6.4.1 General
6.4.2 Rime on single members
6.4.2.1 Slender structural members with width (W) ≤ 0,3 m
17 6.4.2.2 Single members with width (W) > 0,3 m
18 6.4.3 Direction of ice vanes on the structure
19 6.4.4 Rime on lattice structures
6.5 Variation with height above the ground
20 7 Combination of ice loads with other actions
7.1 General
21 7.2 Supplementary provisions for combination of ice and wind actions
22 Annex A (informative)Falling ice considerations
A.1 Use of this Informative Annex
A.2 Scope and field of application
A.3 Impact of falling ice
23 Annex B (informative)Information on how ice loads acts on structures
B.1 Use of this Informative Annex
B.2 Scope and field of application
B.3 General considerations
B.4 Glaze on lattice structures
24 B.5 Rime icing on members inclined to the wind direction
B.6 Wet snow
25 B.7 Unbalanced ice load
26 Annex C (informative)Types of icing and data collection
C.1 Use of this Informative Annex
C.2 Scope and field of application
C.3 Icing types
28 C.4 Data Collection
30 Annex D (informative)Guidance how to use EN 199119

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BSI 23/30457255 DC 2023
$13.70