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FIRE DAMPER ASSESSMENT Town Hall House  2013

Levels 15, 16, 17 and 19
456 Kent Street,
Sydney NSW 2000

Brookfield
FireAssessRisk
NDIBSafe30

Fire dampers were found to have been compromised when installed throughout the assessed areas, without break-away couplings. What this means is that should a fire occur, ductwork may collapse causing the fire damper assembly to be pulled through the wall and may result in firewall collapse. This can only be remedied by installing appropriate fire dampers conforming to AS1682.1 and installed to AS1682.2.

Our suggestion is that the building owner should consider the EP&AR requirement (and previously to that Ordinance 70 requirement), that whenever major alterations, refurbishments or improvements occur (defined as =>50% of the building) within any three (3) calendar years are required to reflect an equivalent to the current building code at the time of such improvements.

Town Hall house has had consistent significant refurbishments occurring over the life of the building (41-years) inclusive of the installation of EWIS throughout the building and significant multi-level fitouts.

The occupants are deserving of a level of occupant protection equivalent to that provided for other similar sized buildings throughout the city. Most of those similar building’s have been completely refurbished and refreshed.

As a minimum, any building service whether base building or introduced, should reflect current code requirements from and including the point of fire compartment separation. This would include: HVAC & Smoke Control (with capacity for not less than the 1 occupant / 10m2 rather than THH original design of 1 occupant/15m2 so that alone may require a 50% increase in HVAC capacity) and we would suggest a total re-evaluation of the configuration of HVAC, ductwork and fire dampers, Automatic Fire Suppression (inclusive of suppression cover for ceiling plenums) - note that sprinkler riser delivery pipework is incapable of reflecting demand. Consideration should be given to relocating hydrants to the fire stairs in place of the current combined hydrant hose reel system in the lobby fire cupboards. Consideration should be given to upgrading the stair pressurisation system to reflect current requirements.

Note that we identified many instances where the fire dampers as well as the lightweight construction (fire rated plasterboard) between occupied space and vertical service risers with non-conformance and large open penetrations

These levels were assessed as they were vacant at the time of assessment conducted January 3rd 2013 and provide a representative sample of fire dampers throughout the high rise levels of this building.

The 1971 building may have pre-dated the AS1682 suite of standards but were found to have not been installed to the tested prototype which is contrary to “NSW Ministerial Specification 7”

Disclaimer

This report was prepared for City of Sydney Properties / Brookfield  FM on the 3rd January 2013 solely for the purpose set out herein and it is not intended for any other persons use. Whilst this report is accurate to the best of our knowledge and belief, NDIBS cannot guarantee completeness or accuracy of any descriptions or conclusions based on information supplied by other parties during site surveys, visits and interviews. Responsibility is disclaimed for any loss or damage, including but not limited to, any loss or damage suffered by City of Sydney arising from the use of this report or suffered by any other person for any reason whatsoever.

To ensure its contextual integrity, the report must be read in its entirety and should not be copied, distributed or referred to in part only

The assessment was conducted by NDIBS- Ian Childs F.IPEA; M.AIES; M.SBSE; M.SFS; Aff.CIBSE and Dr. Paul Childs Ph.D (Elec.Eng.) M.Sc.Tech (Photonics) B.Sc.(Physics) UNSW

THH FD   Level 15   Level 16   Level 17   Level 19   AS1682.1 extract   AS1682.2 extract 

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