Appendix F - Bushfire Hazard Assessment and Managment Report

Bushfire Report


Appendix C Summary of AS3959-2018 BAL-12.5 Construction Requirements

Note: this is a summary of some portions of the standard - the building designer, builder and
subcontractors should refer to AS3959-2018 in full prior to construction.

Subfloor supports

The Standard does not provide construction requirements for sub-floor supports where the
sub-floor is enclosed in accordance with wall that conforms to the requirements for walls listed
below or is enclosed with corrosion resistant steel, bronze or aluminium mesh with a maximum
aperture of 2 mm.

Floors

The Standard does not provide construction requirements for concrete slabs on the ground.

Unenclosed subfloor space

The standard does not provide construction requirements for bearers, joists and floors that
are greater than 400mm above finished ground level

External walls

External walls that are less than 400mm from the ground, decks, carport roofs and similar
elements should be:
    (a) made of non-combustible materials (e.g. full masonry, brick veneer etc.) with a
        minimum thickness of 90 mm,
    (b) timber logs with a density of 680 kg/m 3 and a minimum nominal thickness of 90mm;
        or
    (c) cladding that is fixed externally to a timber or metal frame and is:
         (i)   non-combustible; or
         (ii) fibre cement a minimum of 6mm thick; or
         (iii) bushfire-resisting timber.

Joints

All joints in the external surface material of walls shall be covered, sealed, overlapped, backed
or butt-jointed.

Vents and weepholes

Vents and weepholes in external walls are to be screened with corrosion-resistant steel,
bronze or aluminium mesh with a maximum aperture of 2 mm.

External glazed elements, assemblies and doors

Screens for windows and doors

Where fitted, screens for windows and doors shall have mesh or perforated sheet made of
corrosion-resistant steel, bronze or aluminium with a maximum aperture of 2 mm.

Windows




Max Bushfire Protection Consulting                                                        51