Learn About Bushfire Attack Level Report

Posted by BAL Rating on April 12th, 2017

It has become mandatory for all establishments located within a bushfire vulnerable region to have a BAL assessment Perth report. This report contains a certificate that states the exact bushfire attack level (BAL) rating for a specific site and a report that also lists down the reasons of the rating.
 
Measurement details
 
The BAL is unveils a particular building’s exposure to direct radiant heat, ember attack and flame contact and it is being measured as radiant heat in kilowatts per meter square. In order to make things uncomplicated, all these quantities are classified as bushfire attack level ratings.
 
6 levels of potential radiant heat impacts
 
Low BAL means that insufficient risk is involved and there is no construction requirements needed. The second level is known as bushfire attack level 12.5 and it indicates a reduced threat with a possible risk of an ember attack. In such a situation, the construction elements must be capable of withstanding a heat flux up to 12.5 kW/m2. The third one is known as BAL-19 and a moderate ember attack risk level can be associated with this bushfire attack level report. The risk level is moderate when it comes to potential exposure to radiant heat and burning debris. The construction elements must have the capacity to withstand heat flux up to 19 kW/m2.  
 
The fourth level is BAL- 29 and the risk is a bit higher compred to the previous levels. There is a good chance of potential exposure to high radiant heat, burning debris and ember attack. When it comes to the construction elements, they need to be capable of withstanding heat flux of 29 kW/m2. The fifth level is BAL 40 and it can be described as a high risk rating. The risks involved with burning debris, ember attack and vulnerability to radiant heat are pretty high and you can even expect direct exposure to flames. The heat influx capacity of the construction elements should be 40 kW/m2. Last but not the least, BAL – Flame Zone is the most dangerous situation and there is strong risk of getting into flame contact and you can also expect spread and exposure to increased levels of radiant heat.
 
Learn about the procedure
 
Bushfire attack level assessment is performed by an accredited assessor and it checks the possibility of bushfire threat within a 100 m radius of the site. The second aspect is the separation distance of the building starting from the vegetation edge. All these separation distance and pre-determined classification values are assessed scenically to prepare the report. Trusted assessors conduct a detailed site inspection before preparing the report and they add all the necessary details in a systematic way to make everything crystal clear. The report is submitted within 3 working days.


Any individual who plans to build a home or building in bushfire prone area has to submit this report to the city council. If you are planning to have any alterations in the existing building, this report is also essential. If you want to have a detailed and realistic report, you must hire an established assessor.

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Joined: March 21st, 2017
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