Wind Region C (Cyclonic)
Overview
Region C outlines the Australian coastline over the top end of Australia, starting at Bundaberg in QLD and continuing across to Hamelin Pool in WA.
The regional wind speeds (Vr) in Region C range from:
56 m/s (201.6 km/h) for Importance Level 1 (IL1), up to
73 m/s (262.8 km/h) for Importance Level 4 (IL4).
Why this is important
Defines cyclonic regions in accordance with AS 1170 standards.
Ensures safe and compliant building designs in high-risk areas.
Prevents underestimation of wind loads in structures built within Region C.
Tips, best practices & troubleshooting
Always confirm wind region classification in SMS when quoting in cyclonic areas.
Ensure coastal sites between Bundaberg and Hamelin Pool are classified correctly.
Refer to AS 1170 standards for detailed classification and compliance.
Related resources
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Review & updates
Version history:
v1.0 –
v2.0 – 22 August 2025
Article information
Category: Engineering & Site Specifications
Target audience: Estimators, Sales Coordinators, Franchise Users
Business owner:
Version: v2.0
Last reviewed: 22 August 2025