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Appendix B - Bushfire Hazard Assessment · MCU26/0099
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Phone: 0418 799 818
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7. APPENDIX B - BAL CALCULATIONS
Calculated August 20, 2026, 7:00 am (BALc v.4.9)
Plot 1 Vegetation – Method 2 with QLD inputs
Bushfire Attack Level calculator - AS3959-2018 (Method 2)
Inputs Outputs
Fire Danger Index 46 Rate of spread 1.07 km/h
Vegetation Classification Woodland Flame length 8.91 m
Understorey fuel load 13.8 t/ha Flame angle 73 °
Total fuel load 16 t/ha Panel height 8.52 m
Vegetation height n/a Elevation of receiver 4.26 m
Effective slope 5° Fire intensity 8,891 kW/m
Site slope 0° Transmissivity 0.847
Distance to vegetation 16 m Viewfactor 0.2756
Flame width 100 m Radiant heat flux 17.76 kW/m²
Windspeed n/a Bushfire Attack Level BAL-19
Heat of combustion 18,600 kJ/kg
Flame temperature 1,090 K
Rate of Spread - Mcarthur, 1973 & Noble et al., 1980
Flame length - NSW Rural Fire Service, 2001 & Noble et al., 1980
Elevation of receiver - Douglas & Tan, 2005
Flame angle - Douglas & Tan, 2005
Radiant heat flux - Drysdale, 1999, Sullivan et al., 2003, Douglas & Tan, 2005
Bushfire Assessment Queensland© 19
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