Response to Info Request -Attachment 7 - Bushfire Report MCU18-0015 & RAL18-0001 · MCU18/0015

3.0 Bushfire Hazard Assessment
3.1      Bushfire hazard classification




Figure 3. Council bushfire hazard mapping

 “Bushfire Prone Area” (BPA) is defined under Section 12 of Building Regulation 2006 and the BCA as an area
identified as such by Local Government , in this case using the methodology specified in A new methodology
for State-wide mapping of bushfire prone areas in Queensland (CSIRO 2014). The BCA calls up AS3959-
2009 as providing “Deemed to Satisfy” construction levels for Class 1, 2 and 3 buildings constructed in bushfire
prone areas.

AS3959-2009 specifies building implications within 100m of designated bushfire prone land, or more strictly
speaking, within 100m of intact, classified vegetation (50m in the case of grassland). This BMP establishes
Bushfire Attack Levels (BALs) for affected Lots, using a combination of Methods 1 and 2 approach under
AS3959-2009.

Although ostensibly based on the same methodology, there are differences between State and NC bushfire
hazard mapping. In various ways neither mapping is particularly accurate, neither claim to be, and site
assessment is required to establish bushfire hazard and risk more realistically.

Figure 3 shows only a minor portion mapped as BPA by Council, whereas Figure 4 shows the majority of the site
mapped by State Government as BPA, supporting “Medium potential bushfire intensity”. The remainder of
Section 3 establishes the potential fuel loads and slopes for the site, carried forward to Section 6, which
validates the majority of the Lot as supporting “Medium potential bushfire intensity”, between 4 – 20
000kW/m of fireline.



Report compiled by Bushfire Risk Reducers for Innovative Planning Solutions                Page 8