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AS 4055:2021 changes to wind loads for housing
Wind classifications are changing under the updated AS 4055:2021 standard. For some sites that will mean a shift from non-cyclonic to cyclonic design requirements. The changes align housing rules with broader wind design standards and introduce new regions, updated factors and revised pressure tables that can affect how homes must be designed and built.
This handy resource explains what’s changed, including the new B1 and B2 wind regions, updated climate and direction factors, and boundary changes in parts of Western Australia. It also covers what this means for construction details e.g. framing, fixings, tie-downs and connections, and how the new rules may remove some simplified housing pathways in affected areas.
If you’re pricing jobs, reviewing plans or checking site classifications, these updates could impact both cost and compliance. Get clear, practical guidance on how AS 4055:2021 may affect your projects and what you should check before construction starts under NCC 2025.
Access this resource now
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Who is it for?
Building Professionals
Residential building industry professionals in Australia.
What does it include?
- Incorporation of Region B2
- New Mc and Md factors
- Changes to Region D (and adjacent B2 and C boundaries)
- Technical refinements and table corrections
- When do these changes take effect?