Astute Architectural Drafting
Bushfire, Flooding & Complex sites
Bushfire, Flooding & Complex sites
LOVE your HOME
Astute Architectural Drafting
[email protected] or 02 9890 9272
Astute Architectural Drafting
[email protected] or 02 9890 9272
What is a BAL rating and how does this affect my property?
What is a BAL rating and how does this affect my property?
- A Bushfire Attack Level (BAL) is a measure used to determine the severity of a building’s potential exposure to ember attack, radiant heat, and direct flame contact. It’s measured in increments of radiant heat (expressed in kilowatts/m2).
- A BAL is a basis for establishing the requirements for construction (under the Australian Standard AS 3959-2009 Construction of Buildings in Bushfire Prone Areas), to improve the protection of building elements from bushfire attack.
- The image above shows the various BAL ratings and the radiant heat flux for each rating. The greater the distance from the fire the lower the heat flux and therefore the construction standard is lower.
Asquith - Complex site
Bushfire - BAL FZ
Merrylands - Complex site
Flood control lot
Jindabyne - Complex site
Cold weather climate
Collaroy - Complex site
Heavily sloping
Annandale - Complex site
Narrow block 4m wide
Parramatta - Complex site
Unusual shaped site