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ISO 12494:2017

Current
Current

The latest, up-to-date edition.

Atmospheric icing of structures
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Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

03-30-2017

ISO 12494:2017 describes the general principles of determining ice load on structures of the types listed in this clause.

In cases where a certain structure is not directly covered by this or another standard or recommendation, designers can use the intentions of this document. However, it is the user's responsibility to carefully consider the applicability of this document to the structure in question.

The practical use of all data in this document is based upon certain knowledge of the site of the structure. Information about the degree of "normal" icing amounts (= ice classes) for the site in question is used. For many areas, however, no information is available.

Even in such cases, this document can be useful because local meteorologists or other experienced persons should be able to, on the safe side, estimate a proper ice class. Using such an estimate in the structural design will result in a much safer structure than designing without any considerations for problems due to ice.

CAUTION It is extremely important to design for some ice instead of no ice, and then the question of whether the amount of ice was correct is of less importance. In particular, the action of wind can be increased considerably due to both increased exposed area and increased drag coefficient.

ISO 12494:2017 is intended for use in determining ice mass and wind load on the iced structure for the following types of structure:

- 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 transmission lines, wind turbines, etc.

Atmospheric icing on electrical overhead lines is covered by IEC (International Electrotechnical Commission) standards.

This document is intended to be used in conjunction with ISO 2394.

NOTE Some typical types of structure are mentioned, but other types can also be considered by designers by thinking in terms of which type of structure is sensitive to unforeseen ice, and act thereafter.

Also, in many cases, only parts of structures are to be designed for ice loads because they are more vulnerable to unforeseen ice than is the whole structure.

Even if electrical overhead lines are covered by IEC standards, designers can use this document for the mast structures to overhead lines (which are not covered by IEC standards) if they so wish.

DevelopmentNote
Supersedes ISO/FDIS 12494. (04/2017)
DocumentType
Standard
Pages
58
PublisherName
International Organization for Standardization
Status
Current
Supersedes

Standards Relationship
NEN ISO 12494 : 2017 Identical

UNE-EN 50341-1:2017 Overhead electrical lines exceeding AC 1 kV - Part 1: General requirements - Common specifications
I.S. EN 1991-1-4:2005 EUROCODE 1: ACTIONS ON STRUCTURES - PART 1-4: GENERAL ACTIONS - WIND ACTIONS (INCLUDING IRISH NATIONAL ANNEX)
I.S. EN 50341-1:2012 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
I.S. EN ISO 19906:2010 PETROLEUM AND NATURAL GAS INDUSTRIES - ARCTIC OFFSHORE STRUCTURES
BS EN 50341-1:2012 Overhead electrical lines exceeding AC 1 kV General requirements. Common specifications
BS EN ISO 19906:2010 Petroleum and natural gas industries. Arctic offshore structures
I.S. EN 1991-1-6:2005 EUROCODE 1 - ACTIONS ON STRUCTURES - PART 1-6: GENERAL ACTIONS - ACTIONS DURING EXECUTION
DIN EN 1991-1-4:2010-12 EUROCODE 1: ACTIONS ON STRUCTURES - PART 1-4: GENERAL ACTIONS - WIND ACTIONS
ONORM B 1991-1-4 : 2013 EUROCODE 1: ACTIONS ON STRUCTURES - PART 1-4: GENERAL ACTIONS - WIND ACTIONS - NATIONAL SPECIFICATIONS CONCERNING ONORM EN 1991-1-4 AND NATIONAL SUPPLEMENTS
17/30298929 DC : DRAFT SEP 2017 BS EN ISO 19906 - PETROLEUM AND NATURAL GAS INDUSTRIES - ARCTIC OFFSHORE STRUCTURES
07/30163355 DC : 0 BS 1991-1-6 - UK NATIONAL ANNEX TO EUROCODE 1 - ACTIONS ON STRUCTURES - PART 1-6: GENERAL ACTIONS - ACTIONS DURING EXECUTION
BS ISO 35106:2017 Petroleum and natural gas industries. Arctic operations. Metocean, ice, and seabed data
NF EN 1993-3-1 : 2007 EUROCODE 3 - DESIGN OF STEEL STRUCTURES - PART 3-1: TOWERS, MASTS AND CHIMNEYS - TOWERS AND MASTS
09/19984091 DC : DRAFT JAN 2009 BS EN ISO 19906 - PETROLEUM AND NATURAL GAS INDUSTRIES - ARCTIC OFFSHORE STRUCTURES
CSA ISO 19906 : 2011 PETROLEUM AND NATURAL GAS INDUSTRIES - ARCTIC OFFSHORE STRUCTURES
PREN 13107 : DRAFT 2013 SAFETY REQUIREMENTS FOR CABLEWAY INSTALLATIONS DESIGNED TO CARRY PERSONS - CIVIL ENGINEERING WORKS
ISO 19906:2010 Petroleum and natural gas industries Arctic offshore structures
UNE-EN 1993-3-1:2013 Eurocode 3 - Design of steel structures - Part 3-1: Towers, masts and chimneys - Towers and masts
EN 50341-1:2012 Overhead electrical lines exceeding AC 1 kV - Part 1: General requirements - Common specifications
I.S. EN 13107:2015 SAFETY REQUIREMENTS FOR CABLEWAY INSTALLATIONS DESIGNED TO CARRY PERSONS - CIVIL ENGINEERING WORKS
DIN EN 1993-3-1:2010-12 Eurocode 3: Design of steel structures - Part 3-1: Towers, masts and chimneys - Towers and masts (includes Corrigendum AC:2009)
16/30286853 DC : 0 BS ISO 35106 - PETROLEUM AND NATURAL GAS INDUSTRIES - ARCTIC OPERATIONS - METOCEAN, ICE, AND SEABED DATA
13/30275585 DC : 0 BS EN 13107 - SAFETY REQUIREMENTS FOR CABLEWAY INSTALLATIONS DESIGNED TO CARRY PERSONS - CIVIL ENGINEERING WORKS
CSA ISO 19906 : 2011 : R2016 PETROLEUM AND NATURAL GAS INDUSTRIES - ARCTIC OFFSHORE STRUCTURES
CEI EN 50341-1 : 2013 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
DIN EN 1991-1-6:2010-12 EUROCODE 1: ACTIONS ON STRUCTURES - PART 1-6: GENERAL ACTIONS, ACTIONS DURING EXECUTION
UNI EN 1991-1-6 : 2005 EUROCODE 1 - ACTIONS ON STRUCTURES - PART 1-6: GENERAL ACTIONS - ACTIONS DURING EXECUTION
UNI EN 1991-1-4 : 2010 EUROCODE 1 - ACTIONS ON STRUCTURES - PART 1-4: GENERAL ACTIONS - WIND ACTIONS
DIN EN 1991-1-1 NA E : 2010 NATIONAL ANNEX - NATIONALLY DETERMINED PARAMETERS - EUROCODE 1: ACTIONS ON STRUCTURES - PART 1-1: GENERAL ACTIONS - DENSITIES, SELF-WEIGHT, IMPOSED LOADS FOR BUILDINGS
12/30260570 DC : 0 BS EN 50341-1 - OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
ISO 35106:2017 Petroleum and natural gas industries — Arctic operations — Metocean, ice, and seabed data
BS EN 1991-1-6 NA : 2005 UK NATIONAL ANNEX TO EUROCODE 1: ACTIONS ON STRUCTURES - PART 1-6: GENERAL ACTIONS - ACTIONS DURING EXECUTION
BS EN 1993-3-1:2006 Eurocode 3. Design of steel structures Towers, masts and chimneys
UNI EN ISO 19906 : 2012 PETROLEUM AND NATURAL GAS INDUSTRIES - ARCTIC OFFSHORE STRUCTURES
API 2N : 2015 PLANNING, DESIGNING, AND CONSTRUCTING STRUCTURES AND PIPELINES FOR ARCTIC CONDITIONS
UNI EN 1993-3-1 : 2007 EUROCODE 3 - DESIGN OF STEEL STRUCTURES - PART 3-1: TOWERS, MASTS AND CHIMNEYS - TOWERS AND MASTS
ISO 22111:2007 Bases for design of structures General requirements
BS EN 13107:2015 Safety requirements for cableway installations designed to carry persons. Civil engineering works
BS EN 1991-1-4 : 2005 EUROCODE 1: ACTIONS ON STRUCTURES - PART 1-4: GENERAL ACTIONS - WIND ACTIONS
BS EN 1991-1-6:2005 Eurocode 1. Actions on structures General actions. Actions during execution
EN 1993-3-1:2006/AC:2009 EUROCODE 3 - DESIGN OF STEEL STRUCTURES - PART 3-1: TOWERS, MASTS AND CHIMNEYS - TOWERS AND MASTS
EN 1991-1-4:2005/A1:2010 EUROCODE 1: ACTIONS ON STRUCTURES - PART 1-4: GENERAL ACTIONS - WIND ACTIONS
EN 1991-1-6:2005/AC:2013 Eurocode 1 - Actions on structures Part 1-6: General actions - Actions during execution
EN ISO 19906:2010 Petroleum and natural gas industries - Arctic offshore structures (ISO 19906:2010)
PREN 50341-1 : DRAFT 2012 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
UNE-EN 1991-1-6:2018 Eurocode 1 - Actions on structures Part 1-6: General actions - Actions during execution.
I.S. EN 1993-3-1:2006 EUROCODE 3 - DESIGN OF STEEL STRUCTURES - PART 3-1: TOWERS, MASTS AND CHIMNEYS - TOWERS AND MASTS (INCLUDING IRISH NATIONAL ANNEX)

ISO 4354:2009 Wind actions on structures
ISO 2394:2015 General principles on reliability for structures

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