Approved Reference Documents - 132001.210127.3

Fire Safety Strategy – Bushfire Fire Spread Prevention
100 Cooyar Street, Noosa Heads QLD 4567



It is noted in this report that the building receives a concession by the BCA to be construct from Type C construction
however given the potential radiant heat exposure to the building is it recommended that the new works achieve the
minimum requirements for Type B construction, all external walls are required to be of non-combustible construction
in accordance with BCA Clause C1.9 and Specification C1.1.
As such all external walls, including the roof and eaves are to be non-combustible. And therefore the only remaining
path of fire spread to occur from a bushfire includes windows.
This logic of limiting the potential for fire spread to occur is consistent with the construction recommendations
provided by AS 3959, whereby external building finishes are of non-combustible construction and ember attack is
considered through application of specific measures to the windows and doors, i.e. paths whereby airborne embers
could enter the building.
As such it is recommended that all openings along the eastern and southern elevations of then building, i.e. windows
are provided with shielding against ember attack. Recommendations also include the provision of self-closing doors
and not providing any curtain type materials to unprotected openings. It is also recommended that combustible
sunshades are not provided / fixed to the building serving any outdoor areas along these elevations.
Referring to the figures below, all areas highlighted in orange areas potentially received a RHF above 10 kW/m2 and
therefore potentially exposed to a radiant heat sufficient to cause ignition of curtain type materials when exposed to
a spark, i.e. thermally thin cellulosic type materials exposed to pilot ignition. This characteristic of ignition is also
consistent with the BAL ratings as described for BAL 12.5 whereby a BAL 12.5 is exposed to ember attack. As such
recommendations are provided on this basis.




Figure 7 Bushfire Intensity: Building elements exposed to > 10kW/m2




P a g e 15 | 18                                                               Pro         Project Number: WBFE965-001-2023
                                                                                          Date: 22/03/2023