Bushfire risk assessment risk management plan 199 Maximillian Road Noosa North Shore Revision 1 - November 2019 · MCU20/0087

                         Ecological Natural Area Management


7.6       Results of bushfire attack modelling
Table 8: Assessed Bushfire Attack Levels for the modelled bushfire attacks
                                                      Modelled bushfire attack
Modelled bushfire parameter                           South east bushfire attack
Separation from the hazard                                      16 m
Vegetation                                               Woodland
Modelled surface fuel load                                      15 t/ha
Modelled total fuel load                                        25 t/ha
Vegetation slope (degrees)                                     5.7 0
Site slope (degrees)                                           4.7 0
Modelled rate of spread                                       0.49 km/h
Flame width                                                    100 m
Radiant heat                                                12.48 kW/m2
Modelled fire line intensity                                 6276 kW/m
Modelled flame length                                         6.16 m
Level of construction (BAL)                               BAL 12.5

From Table 4 above the worst case Bushfire Attack Level from the bushfire behaviour modelling is:
      •    BAL 12.5
See Appendix 2 for a detailed software reports from which the above table was generated.
7.7       Bushfire Attack Levels for each building elevation
Australian Standard AS3959: Construction of buildings in bushfire-prone areas specifies that the
building elevation opposite the assessed bushfire attack direction can be reduced on BAL level due
to shielding by the building. However BAL 12.5 cannot be reduced further so the Bushfire Attack
Levels for each of the building elevations are:
      •    BAL 12.5 for all building elevations




Bushfire Risk Assessment and Management Plan for a house at 199 Maximillian Road, Noosa North Shore   November 2019

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