- A reinforced concrete structural frame;
- Automatic fire sprinklers and smoke detection;
- Internal smoke-proof walls between sole occupancy units and corridors;
- Fire separation between the basement car park and habitable levels above; and
- Highly articulated or ‘wedding cake’ external facades that tend to prevent opportunity for vertical fire spread, or flammable materials falling from one level to levels below.
- There was reliance on CodeMark Certificates and a BRAC Certificate in regard to EPS and ACP panels, and these certifications complied with the Building Code and the Regulations;
- The fire risk for the building was substantially “mitigated” by the sprinkler system installed in accordance with the relevant Australian Standard (ie AS2118.4);
- ACP product was installed on the top level only as an eave feature with no risk of vertical external fire spread (and at the hearing only the MFB took issue with the ACP placement);
- EPS product was only utilised on the top 2 storeys, and not the ground level or the floor above. The Board decided that it therefore did not cause an undue fire risk for external fire spread, that would be greater than that contemplated by the deemed to satisfy provisions for a 2 storey Class 2 structure;
- The Board largely accepted the fire engineering advice from the Applicant’s expert Mr Kip, to the effect that EPS is not a banned product, is not prohibited by the Regulations, does not ignite and sustain flaming in the absence of other combustibles, and its mere presence is not an unacceptable fire risk; and
- Configuration of external walls for the separate storeys to ‘cascade back’ in a ‘wedding cake’ type design significantly reduced any chance for flame spread vertically, over multiple levels.
- The Owners’ fire engineering consultant successfully argued that the current version of AS2419.1-2017 does not mandate hydrant booster shielding in sprinkler protected buildings. Clause 7.6.1 (Sprinkler protected buildings) was relevant here, and no performance-based solution was needed; and
- Given the building frame of fire-resisting reinforced concrete construction, with the front elevation cascading back from ground level upwards, the chances of structural collapse were minimised. So even without fire rated shielding the Board decided that there was enough protection for fire fighters from structural collapse, with the current location of the fire hydrant and booster assembly.