AS 1170.4:2024 Structural design actions, Part 4: Earthquake actions in Australia
Standards Australia
Supersedes: AS 1170.4-2007 Structural design actions, Part 4: Earthquake actions in Australia
Supersedes: AS 1170.4-2007 REC:2018 Structural design actions, Part 4: Earthquake actions in Australia
Draft Designation: DR AS 1170.4:2023This document was prepared by the Australian members of Joint Standards Australia/Standards New Zealand Committee BD-006, General Design Requirements and Loading on Structures, to supersede AS 1170.4:2007.
After consultation with stakeholders in both countries, Standards Australia and Standards New Zealand decided to develop this Standard as an Australian Standard rather than an Australian/New Zealand Standard.
The objective of this Standard is to provide designers of structures with earthquake actions and general detailing requirements for use in the design of structures subject to earthquakes with a primary focus on life safety.
The Standard has been drafted to be applicable to the design of structures constructed of any material or combination thereof. Designers will need to refer to the appropriate material Standard(s) on detailing requirements additional to those contained in this Standard.
This Standard is based on equivalent principles to ISO 3010:2017, Basis for design of structures—Seismic actions on structures. ISO 3010 gives guidance on a general format and on detail for the drafting of national Standards on seismic actions. The principles of ISO 3010 have been adopted, including some of the detail, with modifications for the low seismicity in Australia. The most significant points are as follows:
(a) ISO 3010 is drafted as a guide for committees preparing Standards on seismic actions.
(b) Method and notation for presenting the mapped earthquake hazard data has not been adopted.
The terms “normative” and “informative” are used in Standards to define the application of the appendices to which they apply. A “normative” appendix is an integral part of a Standard, whereas an “informative” appendix is only for information and guidance.
Statements expressed in mandatory terms in notes to figures and tables are deemed to be requirements of this document. Notes that appear in the main text of this document provide information only.
AS 1170.4:2024 provides designers of structures with earthquake actions and general detailing requirements for use in the design of structures subject to earthquakes with a primary focus on life safety.
Originated as AS 2121-1979. Revised and redesignated as AS1170.4-1993. Previous edition 2007. Third edition 2024.
Contents:
Section 1: Scope And General
Section 2: Design Procedure
Section 3: Site Hazard
Section 4: Site Sub-Soil Class
Section 5: Earthquake Design
Section 6: Equivalent Static Analysis
Section 7: Dynamic Analysis
Section 8: Design Of Parts And Components
Appendix A: (Normative) Domestic Structures (Housing)
Appendix B: (Informative) Structural Ductility Factor And Structural Performance Factor For Specific Structure Types
Appendix C: (Informative) Displacement Clearances Between Parts And Components
General Design Requirements and Loading on Structures.
BD-006
Australasian Wind Engineering Society; Australian Building Codes Board; Australian Steel Institute; Bureau of Steel Manufacturers of Australia; Cement Concrete&Aggregates Australia; Concrete Institute of Australia; Concrete Masonry Association of Australia; Engineers Australia; Forest and Wood Products Australia; Housing Industry Association; Insurance Council of Australia; James Cook University; Property Council of Australia; Steel Reinforcement Institute of Australia; Swinburne University of Technology; The University of Melbourne; University of Newcastle.
