SHENTON PARK WA 6 008 N/A N/A Lot Development...SHENTON PARK WA 6 008 City of Nedlands N/A N/A Lot...

N/A -- 38 Lemnos Street

SHENTON PARK WA 6008

City of Nedlands

N/A N/A Lot Development

N/A (Future building works

Method 1 Excluded AS3959-2018 2.2.3.2(e) (f) N/A N/A BAL- LOW

Mike Scott

BPP Group Pty Ltd ABN 39 166 551 784

27795

27-06-2019

Bushfire Attack Level Assessment Report

Location: Lot 38 Lemnos Street Shenton Park

City of Nedlands

Job Number: 170023

Report Date: 27 June 2019

AS 3959 BUSHFIRE ATTACK LEVEL (BAL) ASSESSMENT REPORT

170023 – Lot 38 Lemnos Street Shenton Park 1

This document has been prepared by:

BPP Group Pty Ltd t/a Bushfire Prone Planning

ACN: 39 166 551 784 | ABN: 39 166 551 784

Level 1, 159-161 James Street

Guildford WA 6055

PO Box 388

Guildford WA 6935

08 6477 1144 | [email protected]

Commercial in Confidence

The information, including any intellectual property, contained in this document is confidential and proprietary to the

Company. It may only be used by the person to whom it is provided for the stated purpose for which it is provided and

must not be imparted to any third person without the prior written approval of the Company. The Company reserves all

legal rights and remedies in respect of its confidential information.

Disclaimer

The measures contained in this report are considered to be minimum standards and they do not guarantee that a

building will not be damaged in a bushfire, persons injured, or fatalities occur either on the subject site or off the site

while evacuating. This is substantially due to the unpredictable nature and behaviour of fire and extreme weather

conditions. Additionally, the correct implementation of the required bushfire protection measures (and any associated

response/evacuation plan if applicable) will depend, among other things, on the actions of the landowners or occupiers

over which Bushfire Prone Planning has no control.

All surveys, forecasts, projections and recommendations made in this report associated with the project are made in

good faith based on information available to Bushfire Prone Planning at the time. All maps included herein are indicative

in nature and are not to be used for accurate calculations.

Notwithstanding anything contained therein, Bushfire Prone Planning will not, except as the law may require, be liable

for any loss or other consequences whether or not due to the negligence of their consultants, their servants or agents -

arising out of the services provided by their consultants.

mailto:[email protected]



This report has been prepared by an Accredited BPAD Practitioner using the Simplified Procedure (Method 1)

as detailed in Section 2 of AS 3959 – 2018. All enquiries related to the information and conclusions presented

in this report must be made to the BPAD Accredited Practitioner. FPA Australia makes no warranties as to the

accuracy of the information provided in the report

PROPERTY DETAILS & DESCRIPTION OF WORKS

Unit no.

-

Street no.

-

Lot no.

Lot 38

Street name / Plan Reference

Lemnos Street

Suburb

SHENTON PARK

State

WA

Postcode

6558

Local Government Area

City of Nedlands

Property Area

8481m2

Main BCA class of the building

N/A

Use(s) of the

building

Lot development

Description of Building Works

N/A (Future building works)

REPORT DETAILS

Report/Job Number

170023

Report Version

BAL - (V1)

Assessment Date

29/06/2019

Report Date

27/06/2019

Client Details

Montario Quarter Pty Ltd

Telephone

0403 924 107 Email

[email protected]

Client Address

C/- Tim Dawkins, Urbis, Level 14 1 William Street PERTH WA 6000

Reliance on the assessment and determination of the Bushfire Attack Level contained in this report should

not extend beyond a period of 12 months from the date of issue of the report. If this report was issued more

than 12 months ago, it is recommended that the validity of the determination be confirmed with the

Accredited Practitioner and where required an updated report and/or BAL Certificate issued.

BPAD ACCREDITED PRACTITIONER DETAILS

Bushfire Management Plan (BMP) and Firebreak & Fuel Load Notice: If the property (lot) is subject to an

approved BMP (refer to land title) the landowner is responsible for complying with their responsibilities

established by the BMP (including maintenance of the asset protection zone and other vegetation

BPAD 27795

27 June 2019

Mike Scott

Bushfire Prone Planning

ABN: 39 166 551 784

Level, 159-161 James Street

Guildford WA 6055



management). This is in addition to the requirement to comply with the Local Government Firebreak & Fuel

Load Notice.

Site Plan - (plans/drawings relied upon to determine the bushfire attack level)

Disclaimer and Limitation: This map has been prepared for bushfire management planning purposes only. All depicted areas, contours and any dimensions shown are subject to survey. Bushfire Prone Planning does not guarantee that this map is without flaw of any kind and disclaims all liability for any errors, loss or other consequence which may arise from relying on any information depicted.

170023 - 38 Lemnios Street,Shenton Park (BAL).qgz

Meters

27/6/2019

Lot 38

100m Area of Interest

Hydrants

Photos

Other Lots

Classified Vegetation

Exclusion 2.2.3.2

Legend

AUTHOR: Jason BensonDATE: SCALE: A4CRS: GDA 94 MGA 50 AERIAL IMAGERY: Landgate/SLIP

Lot 38 Lemnos Street,Shenton Park

Topography &Classified Vegetation



VEGETATION CLASSIFICATION

.

All vegetation within 100 metres of the site/proposed development is identified and classified in

accordance with AS 3959-2018 s2.2.3 and Table 2.3 (note: overstoreys of open woodland, low open

woodland, tall open shrubland and low open shrubland should be classified to the vegetation type on the

basis of their understoreys). The Visual Guide for Bushfire Risk Assessment in WA (DoP February 2016) and

any applicable FPA Australia BPAD Practice Note will also be referenced.

Vegetation Area Classification Applied or Exclusion Clause: Excluded AS3959-2018 2.2.3.2 (e) Non

Vegetated Areas

Vegetation Type Present: Low Threat Vegetation

Description / Classification Justification: Understorey vegetation removed.

Photo ID: 1 Photo ID: 9

Vegetation Area Classification Applied or Exclusion Clause: Excluded AS3959-2018 2.2.3.2 (f) Low Threat

Vegetation

Vegetation Type Present: Low Threat vegetation

Description / Classification Justification: Understorey managed, branches trimmed






Vegetation

Vegetation Type Present: Low threat vegetation

Description / Classification Justification: Ficus sp, Queensland Brush Box, no understorey vegetation.



Vegetation


Description / Classification Justification: Queensland Brush Box, Lemon Scented gum, understorey removed.

Photo ID: 6





Vegetation

Vegetation Type Present: Low threat vegetation (area subject to Bushfire Management Plan)

Description / Classification Justification: Jarrah, Marri with managed understorey vegetation



Vegetation


Description / Classification Justification: Norfolk Island Pine, Jacaranda, Jarrah. Understory vegetation

removed.





Vegetation Area 4 Classification Applied or Exclusion Clause: Excluded AS3959-2018 2.2.3.2 (e) Non

Vegetated Areas

Vegetation Type Present: Vegetation removed

Description / Classification Justification: Non vegetated area

Photo ID: 12



POTENTIAL BUSHFIRE IMPACTS - BUSHFIRE ATTACK LEVELS (BAL’s)

Bushfire Attack Level (BAL): The potential bushfire impact to the proposed building or works from each

of the classified vegetation areas is measured as kW/m2 of radiant heat flux and is stated as a BAL

rating (each represents a set ranges of radiant heat flux). The BAL rating associated with each

classified vegetation area is determined and it is the highest BAL rating that will apply to the proposed

building or works.

Separation Distance: Is the distance from a subject site (or building) to the area of classified

vegetation. This distance is measured from the building (building wall or verandah/patio column/post)

to a point considered the “edge of the classified vegetation” as per AS 3959 -2018 s2.2.4 and

considered as the “base of the bushfire prone vegetation (not the canopy)” as per the BAL Assessment

[Basic] Factsheet (WAPC 2015 v1.0). The exact point of measurement determined by the assessor is

based on the fuel structure and expected fire behaviour. If a precautionary approach is considered

appropriate to a given situation the measurement will be taken at the canopy line.

.

POTENTIAL BUSHFIRE IMPACTS – DETERMINATION OF BAL RATINGS

Application

of

AS 3959-

2018

Applied Methodology Vegetation Classification Applied Fire Danger

Index (FDI)

Applied BAL

Determination Table

Method 1(Section 2.2) Table 2.3 and Figure 2.3 FDI 80 (Table 2.1) Table 2.5

Ve

ge

tatio

n

Are

a Applied

Vegetation

Classification

Assessed

Effective

Slope

Applied Effective

Slope

Assessed

Separation

Distance

Applied

Separation

Distance

Bushfire

Attack

Level

(degrees) (degrees range) (metres) (metres range) (BAL)

Excluded AS 3959-

2018 2.2.3.2 (e)(f) N/A N/A N/A N/A BAL-LOW



THE DETERMINED BUSHFIRE ATTACK LEVEL TO APPLY TO CONSTRUCTION REQUIREMENTS

The Bushfire Attack Level (BAL) that is to apply to the proposed building or works is the highest BAL,

representing the highest potential bushfire impact. This has been determined in accordance with Section

2.2.6 of AS 3959 – 2018 using the site assessment data and analysis presented on the previous page.

INDICATIVE HIGHEST BUSHFIRE ATTACK LEVEL (BAL) BAL - LOW

SHIELDING PROVISIONS – REDUCTION IN CONSTRUCTION REQUIREMENTS (AS 3959-2018 SECTION 3.5)

If any elevation of the proposed building or works are not exposed to the source of bushfire attack, the

construction requirements corresponding to one BAL rating lower than the determined BAL rating may be

applied to those elevations (to a minimum of BAL-12.5).

If applicable to this assessment, the relevant shielded elevations are identified on the Site Plan.

Do the shielding provisions apply to any elevation of the subject building? -

Description of Shielded Elevation/s: N/A



ADDITIONAL LANDOWNER INFORMATION: BUSHFIRE ATTACK LEVELS AND CONSTRUCTION REQUIREMENTS

AS 3959-2018 Construction of buildings in bushfire prone areas defines a Bushfire Attack Level (BAL) as a “means of measuring the severity of a building’s potential

exposure to ember attack, radiant heat and direct flame contact, using increments of radiant heat flux expressed in kilowatts per metre squared, and is the basis

for establishing the requirements for construction to improve protection of building elements from attack by bushfire.”

The Building Code of Australia (BCA) establishes that for certain classes of buildings in designated bushfire prone areas, the construction requirements can be

met by constructing in accordance with either AS 3959-2018 or the NASH STANDARD – STEEL FRAMED CONSTRUCTION IN BUSHFIRE AREAS.

BUSHFIRE

ATTACK

LEVEL

DESCRIPTION OF PREDICTED BUSHFIRE ATTACK

AND LEVELS OF EXPOSURE

REFERENCES FOR CONSTRUCTION REQUIREMENTS

AS 3959-2018 (BCA deemed to satisfy

solution for Class 1, 2,

3 & 10a)

THE NASH STANDARD

(BCA deemed to satisfy solution for Class 1 & 10a)

BAL – LOW

There is insufficient risk to warrant specific construction requirements

but there is still some risk. (Note: DFES recommend that ember attack

protection features be incorporated in the design where practicable).

Section 4.

No Requirements No Requirements

BAL – 12.5 Risk is considered low. Risk of ember attack. Construction elements

exposed to heat flux not greater than 12.5 kW/m2 Sections 3 & 5.

All construction requirements for BAL-12.5 to BAL-40

are identical except for windows and external doors,

which must comply with AS 3959-2018 for each BAL

rating.

The construction requirements are set out as

predominantly non-combustible construction systems

for each of the following building elements:

• Section 1.4 General Requirements;

• Section 2 Roof and Ceiling System;

• Section 3 External Wall System;

• Section 4 Floor System; and

• Section 5 Carports Verandahs and Decks.

BAL – 19

Risk is considered moderate. Risk of ember attack and burning debris

ignited by windborne embers. Construction elements exposed to a

heat flux not greater than 19 kW/m2.

Sections 3 & 6

BAL – 29

Risk is considered high. Increased risk of ember attack and burning

debris ignited by windborne embers. Construction elements exposed

to a heat flux not greater than 29 kW/m2.

Sections 3 & 7.

BAL – 40

Risk is considered very high. Much increased risk of ember attack and

burning debris ignited by windborne embers. Some likelihood of direct

exposure to flames from the fire front. Construction elements exposed

to a heat flux not greater than 40kW/m2.

Sections 3 & 8.

BAL – FZ

(Flame

Zone)

Risk is considered extreme. Extreme risk of ember attack and burning

debris ignited by windborne embers. Likelihood of extreme level of

radiant heat and direct exposure to flames from the fire front. The

construction elements are expected to be exposed to a heat flux

greater than 40 kW/m2.

Sections 3 & 9.

The construction requirements are set out in Sections

1-5 and differ from the requirements for all other BAL

ratings.

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