Wind Region B
Overview
Region B follows behind Region C along the Australian coastline from Grafton, NSW, over the top of Australia to Leeman in WA.
The regional wind speeds (Vr) in Region B range from:
48 m/s (172.8 km/h) for Importance Level 1 (IL1), up to
63 m/s (226.8 km/h) for Importance Level 4 (IL4).
Why this is important
Correct wind region classification ensures safe and compliant building design.
Regional wind speed directly impacts structural engineering requirements.
Prevents under- or over-designing by applying the correct AS 1170 standards.
Tips, best practices & troubleshooting
Always confirm the wind region in SMS by pinning the site location accurately.
Check for overlaps near boundaries between Region B and other wind regions.
Refer to AS 1170 standards when confirming regional wind speeds.
Related resources
Request Engineering (Site Check)
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