Building in Flood Hazard Areas

In July 2010, the Building Ministers representing the Australian, State and Territory Governments agreed to the ABCB developing a standard for the construction of certain buildings in flood hazard areas together with an accompanying information handbook. The project was included the 2010-11 ABCB work program.

The standard 'Construction of Buildings in Flood Hazard Areas' and the accompanying Handbook were developed by the ABCB Office with the assistance of an expert Reference Group. The standard covers Class 1, 2, 3, 9a and 9c buildings and Class 4 parts of buildings i.e buildings where people may sleep, reflecting the primary purpose of the standard which is life safety.

New Performance Requirements for buildings in flood hazard areas are introduced in NCC 2013. The Deemed-to-Satisfy Provisions of both Volumes of the BCA reference the new flood standard. The Performance Requirements cover most flood hazard situations, but the Deemed-to-Satisfy Provisions do not cover areas subject to storm surge, coastal erosion, landslip or mudslide. In addition, the Deemed-to-Satisfy Provisions do not apply where the maximum flood flow velocity exceeds 1.5m/s. Where this limitation is exceeded, an alternative solution must be developed which complies with the relevant Performance Requirements.

A Regulation Impact Statement was prepared which supports the inclusion of the flood standard in the NCC.

Updated: 16 May 2013