Building in a Bushfire Prone Area

 

This Fast Fact outlines the requirements of the:

  • rfs-logo

    NSW Rural Fire Service (RFS) for the types of timbers permitted for exposed supports, posts and beams for buildings located on bush fire prone land in NSW;

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    Bushfire Attack Level (BAL) 40 requirements for Fascia and Bargeboards.

 AS3959 (2009) – Construction of buildings in bush fire prone areas does not specifically address the issue of exposed supports, posts and beams for such applications. As such, there is a need to adopt a practical approach to the matter and ensure that the intent of AS3959 (2009) and the NSW document Planning for Bush Fire Protection 2006 is applied.

Applications #1, #2, and #3

In determining the type of timber appropriate for the building components, the requirements of AS3959 (2009) and Addendum Appendix 3 of Planning for Bush Fire Protection 2006 for exposed supporting timber posts and beams for other components of a building have been considered. Therefore, the NSW RFS provides the following advice in regards to the applications described in #1, #2, and #3 above.

BAL 12.5, BAL19, and BAL 29

  1. Non combustible;
  2. Bush fire resisting timber;
  3. Combination of a) and b)

BAL 40 –

  1. Non combustible;
  2. Comply with 1530.8.1;
  3. Combination of a) and b)

BAL FZ

Performance based – Generally, non combustible construction materials are permitted. Materials that comply with 1530.8.2 and do not support flaming are also considered appropriate.

In determining the type of timber appropriate for the building components, the requirements of AS3959 (2009) and Addendum Appendix 3 of Planning for Bush Fire Protection 2006 for exposed supporting timber posts and beams for other components of a building have been considered. Therefore, the NSW RFS provides the following advice in regards to the applications described in #1, #2, and #3 above.

info-iconPlease note that the above requirements are deemed necessary regardless of whether the timber supports / posts / beams are load bearing or non-load bearing. These requirements attempt to mitigate the ignition of timbers and the spread of fire to other building components (e.g. windows, eaves, roof cavity etc) as well as addressing any issues associated with structural integrity of the building when exposed to bush fire.

info-iconIn the opinion of the NSW RFS, the above measures will ensure that the requirements for exposed timbers as per AS3959 (2009) and Planning for Bush Fire Protection 2006 are applied consistently and that building occupants are provided with what is currently considered best practice bush fire protection.

Free Consultation

For further informationregarding bush fire protection measures, please contact
Development Assessment and Planning on (02) 8741 5175.

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