High wind construction requirements

The BCA gives additional guidelines to ensure that buildings constructed in designated high wind areas are provided with sufficient restraint to transfer wind forces to the ground to prevent collapse, uplift or sliding of the footing systems.

This is achieved by:

  • appropriate anchorage systems
  • bracing systems which provide sufficient lateral restraint
  • structural elements which are adequately connected together.

For example, in cyclonic areas, metal roof systems and their connections and supporting members must comply with:

a) AS/NZS 1170.2 or AS 1170.2
b) be capable of remaining in position and resisting any permanent damage that may occur in the sheet or fastenings under pressure.

Refer to the BCA, Section 3.10.1 High wind areas for more information.