AS/NZS 1170.3:2003
Structural design actions - Part 3: Snow and ice actions
Provides design values of snow and ice actions for use in structural design. It is intended to be used in conjunction with AS/NZS 1170.0,which gives the procedure for structural design. Snow regions are defined and ground snow loads are provided for a range of annual probabilities of exceedance. Other factors cover the environment around the structure, the geometry of the structure and the effect of winds on snow distribution.
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AS/NZS 1170.3:2003 STRUCTURAL DESIGN ACTIONS - SNOW AND ICE ACTIONS
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 APPLICATION
1.3 NORMATIVE DOCUMENTS
1.4 DETERMINATION OF DESIGN ACTIONS
1.5 DEFINITIONS
1.5.1 Alpine
1.5.2 Characteristic snow load on the ground (sg)
1.5.3 Exposure reduction coefficient (Ce)
1.5.4 Obstructed roof
1.5.5 Roof
1.5.6 Shape coefficient ( i)
1.5.7 Sheltered
1.5.8 Semi-sheltered
1.5.9 Sub-alpine
1.5.10 Terrain classification
1.5.11 Value of snow load on roof (s)
1.5.12 Windswept
1.6 UNITS
1.7 NOTATION
SECTION 2 SNOW REGIONS
2.1 GENERAL
2.2 AUSTRALIA
2.3 NEW ZEALAND
SECTION 3 ICE ACTION
3.1 GENERAL
3.2 DETERMINATION OF FORCES
3.3 ICE DENSITY
3.4 ICE THICKNESS
SECTION 4 SNOW ACTION
4.1 GENERAL
4.2 DESIGN SNOW LOADS
4.2.1 Roof snow load
4.2.2 Exposure reduction coefficient
4.2.3 Snow overhanging the edge of a roof
4.2.4 Snow actions on snowguards and obstructions
SECTION 5 GROUND SNOW LOAD
5.1 GENERAL
5.2 PROBABILITY FACTOR
5.3 GROUND SNOW LOADS FOR ALPINE REGIONS
5.4 GROUND SNOW LOADS FOR SUB-ALPINE REGIONS
5.4.1 General
5.4.2 Australia
5.4.3 New Zealand
SECTION 6 SHAPE COEFFICIENTS FOR ALPINE REGIONS
6.1 GENERAL
6.2 BALANCED SNOW LOAD
6.3 MONO-PITCHED ROOFS
6.4 DUO-PITCHED ROOFS
6.5 MULTI-PITCHED ROOFS
6.6 DRIFTING CAUSED BY OBSTRUCTIONS HIGHER THAN THE ROOF
6.7 DRIFTING AT PROJECTIONS AND OBSTRUCTIONS
6.8 CYLINDRICAL ROOFS
SECTION 7 SHAPE COEFFICIENTS FOR SUB-ALPINE REGIONS
7.1 GENERAL
7.2 SHAPE COEFFICIENTS AS FOR ALPINE REGIONS
7.3 OBSTRUCTED ROOFS
7.4 DRIFTING ON LOWER ROOFS
7.5 CURVED ROOFS
APPENDIX A - BIBLIOGRAPHY
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AS/NZS 1170.3:2003 STRUCTURAL DESIGN ACTIONS - SNOW AND ICE ACTIONS
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 APPLICATION
1.3 NORMATIVE DOCUMENTS
1.4 DETERMINATION OF DESIGN ACTIONS
1.5 DEFINITIONS
1.5.1 Alpine
1.5.2 Characteristic snow load on the ground (sg)
1.5.3 Exposure reduction coefficient (Ce)
1.5.4 Obstructed roof
1.5.5 Roof
1.5.6 Shape coefficient ( i)
1.5.7 Sheltered
1.5.8 Semi-sheltered
1.5.9 Sub-alpine
1.5.10 Terrain classification
1.5.11 Value of snow load on roof (s)
1.5.12 Windswept
1.6 UNITS
1.7 NOTATION
SECTION 2 SNOW REGIONS
2.1 GENERAL
2.2 AUSTRALIA
2.3 NEW ZEALAND
SECTION 3 ICE ACTION
3.1 GENERAL
3.2 DETERMINATION OF FORCES
3.3 ICE DENSITY
3.4 ICE THICKNESS
SECTION 4 SNOW ACTION
4.1 GENERAL
4.2 DESIGN SNOW LOADS
4.2.1 Roof snow load
4.2.2 Exposure reduction coefficient
4.2.3 Snow overhanging the edge of a roof
4.2.4 Snow actions on snowguards and obstructions
SECTION 5 GROUND SNOW LOAD
5.1 GENERAL
5.2 PROBABILITY FACTOR
5.3 GROUND SNOW LOADS FOR ALPINE REGIONS
5.4 GROUND SNOW LOADS FOR SUB-ALPINE REGIONS
5.4.1 General
5.4.2 Australia
5.4.3 New Zealand
SECTION 6 SHAPE COEFFICIENTS FOR ALPINE REGIONS
6.1 GENERAL
6.2 BALANCED SNOW LOAD
6.3 MONO-PITCHED ROOFS
6.4 DUO-PITCHED ROOFS
6.5 MULTI-PITCHED ROOFS
6.6 DRIFTING CAUSED BY OBSTRUCTIONS HIGHER THAN THE ROOF
6.7 DRIFTING AT PROJECTIONS AND OBSTRUCTIONS
6.8 CYLINDRICAL ROOFS
SECTION 7 SHAPE COEFFICIENTS FOR SUB-ALPINE REGIONS
7.1 GENERAL
7.2 SHAPE COEFFICIENTS AS FOR ALPINE REGIONS
7.3 OBSTRUCTED ROOFS
7.4 DRIFTING ON LOWER ROOFS
7.5 CURVED ROOFS
APPENDIX A - BIBLIOGRAPHY
AS/NZS 1170.3:2003
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.