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RDH facade & Waterproofing

Sitzler - Project - RDH Racade & Waterproofing
project details
Location:
Darwin, Northern Territory
Client:
Department of Transport & Works
Contract Value:
$1.0M
Completion Date:
November 2000
Referees:
John Wauchope, Transport & Works
Graeme Ferns, Royal Darwin Hospital

Upon award of this project the scope of works included access and waterproofing, but this was to change quite considerably during the life of the project.

Originally the intent of the documentation was to provide access to the work face via swing stage scaffolding. Following consultation with the client and the Work Health Authority it was determined that the only acceptable means of access was to employ static scaffolding to the main ward block and swing stages to the lift tower and ends of the main ward block. Due to the costs of the access the full extent of the project was not able to be determined until the scaffolding was in place.

On commencement of the project a small number of window flashings were identified as requiring replacement and some concrete cancer repairs were required to the window sills.

The first major addition to the scope of works was identified when the swing stage to the lift tower was in place, and it was found that the existing wall ties were not only installed at too great centres but a number of them were corroded to the point of non existence. This meant that the lift tower wall, 11 floors up would sway when pushed by hand from the swing stage. Sitzler proceeded to secure this portion of the brickwork with purpose made clamps and sourced a remedial wall tie for installation. The wall tie submitted for consideration and subsequently approved is manufactured from fibreglass and so offers resistance to corrosion. By the completion of the project some 2700 remedial wall ties were installed.

A major obstacle was the presence of radio transmission aerials located on the lift tower and the main roof of the building. These aerials had to be turned off while the swing stage rostrums were being installed, hence of paramount importance was that minimal disruption occurred to these services. The organisation was quite involved as these aerials are owned and operated by numerous companies, which included Telstra, Orange, Optus, St Johns Ambulance and Police and Emergency Services.

The use of mobile phones above the sixth floor was prohibited as the signal from the mobile phones could interfere with some of the medical equipment. Sitzler set up an on site communication system utilising hand held radios and put in place strict site rules prohibiting our subcontractors from using their mobile phones.

In summary the project ran very smoothly and it did not interfere in any way with the day to day operation of the hospital. With the sun hoods having a coloured waterproof membrane applied the client has an improvement in the appearance of the building as well as a waterproof exterior.