as 3959 bushfire attack level (bal) assessment report · bal rating requirements as3959-2009 page...

BAL Assessment Report

BAL Rating.com.au

AS 3959 Bushfire Attack Level (BAL)

Assessment Report

Site Details

Address: 123 Demo

Suburb: Demo State: WA

Local Government Area: Shire of Demo

Description of Building Works: Class 1a

Report Details

Report / Job Number: 000001 Report Version: (1)

Assessment Date: 1/1/2016 Report Date: 1/1/2016


BAL Rating.com.au

Contents Site Assessment & Site Plans ........................................................................................................................................ 3

Vegetation Classification .............................................................................................................................................. 4

Vegetation Classification .............................................................................................................................................. 5

Determined Bushfire Attack Level ................................................................................................................................ 6

Relevant Fire Danger Index ...................................................................................................................................... 6

Potential Bushfire Impacts ....................................................................................................................................... 6

Diagram Explaining Slopes ........................................................................................................................................ 6

Determined Bushfire Attack Level (BAL) .................................................................................................................. 6

BAL ratings explained ................................................................................................................................................... 7

Construction Requirements .......................................................................................................................................... 7

Appendix 1 - Site Plan showing setbacks ...................................................................................................................... 9


P a g e | 3

BAlrating.com.au

Site Assessment & Site Plans The assessment of this site / development was undertaken on XX/XX/XXXX by a Practitioner of BAlRating.com.au

for the purpose of determining the Bushfire Attack Level in accordance with AS 3959 - 2009 Simplified Procedure

(Method 1).

FIGURE 1: SITE PLAN TAKEN FROM NEARMAPS.COM (PLEASE NOTE THAT THE PHOTO MAY NOT BE CURRENT)


P a g e | 4

BAlrating.com.au

Vegetation Classification

All vegetation within 100m of the site / proposed development was classified in accordance with Clause 2.2.3 of

AS 3959-2009. Each distinguishable vegetation plot with the potential to determine the Bushfire Attack Level is

identified below.

All photos are taken on the day of assessment, any changes or modifications to vegetation can influence the

rating. A reassessment will be necessary before any rating can be lowered.

Plot 1 Class A Forest Rating 12.5 Photo ID 1 Photo ID 2



P a g e | 5

BAlrating.com.au

Vegetation Classification




P a g e | 6

BAlrating.com.au

Determined Bushfire Attack Level

Relevant Fire Danger Index The fire danger index for this site has been determined in accordance with Table 2.1 or otherwise determined in

accordance with a jurisdictional variation applicable to the site.

Fire Danger Index

FDI 40 Table 2.4.5

FDI 50 Table 2.4.4

FDI 80 ☑ Table 2.4.3

FDI 100 Table 2.4.2

Potential Bushfire Impacts The potential bushfire impact to the site / proposed development from each of the identified vegetation plots are

identified below.

Plot Vegetation Classification Effective Slope Separation (m) Exclusions * BAL

1 Class A - Demo Upslope/0 101m A LOW

2

3

4 Table 1: BAL Analysis - *Exclusions refer to clause 2.2.3.2 as found in AS39-59-2009

Diagram Explaining Slopes

Determined Bushfire Attack Level (BAL) The Determined Bushfire Attack Level (highest BAL) for the site / proposed development has been determined in

accordance with clause 2.2.6 of AS 3959-2009 using the above analysis.

Determined Bushfire Attack Level BAL - XXX


P a g e | 7

BAlrating.com.au

BAL ratings explained

BAL rating Explanation Risk

BAL - LOW There is insufficient risk to warrant any specific construction

requirements but there is still some risk. VERY LOW

BAL - 12.5 There is a risk of ember attack. The construction elements are expected

to be exposed to a heat flux not greater than 12.5 kW/m2. LOW

BAL - 19 There is a risk of ember attack and burning debris ignited by wind

borne embers and a likelihood of exposure to radiant heat. MODERATE

BAL - 29 There is an increased risk of ember attack and burning debris ignited

by windborne embers and a likelihood of exposure to an increased

level of radiant heat.

HIGH

BAL - 40 There is a much increased risk of ember attack and burning debris

ignited by windborne embers, a likelihood of exposure to a high level

of radiant heat and some likelihood of direct exposure to flames from

the fire front

VERY HIGH

BAL - FZ There is an extremely high risk of ember attack and burning debris

ignited by windborne embers, and a likelihood of exposure to an

extreme level of radiant heat and direct exposure to flames from the

fire front.

EXTREME.

Construction Requirements BAL Rating Requirements As3959-2009

Page number Low No construction requirements Section 4

BAL 12.5 Construction sections 3 and 5 pg42

BAL 19 Construction sections 3 and 6 pg50



BAL FZ Construction sections 3 and 9 74


P a g e | 8

BAlrating.com.au

BAL Rating.com.au Representative

Name: Full Name

Signature:

This report can be validated to confirm that it is genuine by entering the job number on www.BALrating.com.au

This report is only valid for a period of 12 months from the date of issue.


P a g e | 9

BAlrating.com.au

Appendix 1 - Site Plan showing setbacks

This report has been prepared in conjunction with the plan provided by client Ref xxx-xx-x Dated 1/1/2016. If any

changes are made to the plan you will need to contact us to confirm that it doesn’t conflict with issued rating.

as 3959 bushfire attack level (bal) assessment report · bal rating requirements as3959-2009 page...

Documents