The new planning guidelines for building in bushfire-prone areas do not preclude the use of timber - even at the higher BALs or Bushfire Attack Levels. Instead the new rules address choice of species and the design of buildings.There are six specified attack levels:The choice of timbers for framing and internal joinery in new houses is unaffected by the new code - but for the lower BAL categories, external timber for decking and window frames must be chosen from the range of species in the E-1 Table - timbers of density greater than 750kgs/m3. This includes Messmate and the Stringybarks. For the higher BAL categories, designers are directed to the BRT Table - the bushfire resisting timbers. The BRTs are timbers with a naturally high ignition point and include species with dry densities exceeding 900kg/m3. The outline of the new code can be read on the Wood Solutions website. •Building With Timber In Bushfire-Prone Areas Guide 4It is worth noting that even if your building includes these BRT species for decking and handrail timbers used externally, it should not be understood that they are impervious to bushfire. Your deck and outdoor structures may require replacement after a fire has scorched and passed through.BCA Code For Timber Used In Commercial BuildingsFor the fire properties of timber lining boards and floor boards used in non-bushfire areas, please refer to the flammability indices for different species provided in a table in this link to ATFA - Australian Timber Flooring Association.