Part of Devine and Leighton Properties’ prestigious Hamilton
Harbour project in Brisbane, the Harbour One building is a 22 storey apartment
block that houses 258 separate dwellings.
The building sits on the banks of the Brisbane River in a landscaped
parkland setting, which it shares with the smaller Harbour Two residential
building and the KSD mixed-use precinct, which offers office space, retail and leisure
Christopher Contracting, who had worked on a number of
previous Devine projects, were selected as the design and construct plumbing
contractor for both residential buildings.
After discussing with Studor’s Queensland Area Manager the various
merits of the Studor Single Pipe System, particularly its cost-effectiveness,
Christopher Contracting considered this an ideal opportunity to put the system
to the test. They elected to install the Studor Single Pipe System in the
larger of the two buildings, whilst the drainage system of Harbour Two was to
be based on a Reduced Velocity Aerator Stack System (RVASS), which was the option
originally specified on both buildings.
Planning & Preparation The plans for the 24 stack
drainage system utilising Studor technology were drawn up by Brisbane
hydraulics consultants, Dennis Cairns and Associates. In total, the entire drainage
system utilised 514 Studor Air Admittance Valves (AAVs) and 166 Studor P.A.P.A.s
(Positive Air Pressure Attenuators).
These were to be installed horizontally in the ceiling space
between the habitable areas, thereby preventing any reduction in the amount of
usable floor space. Studor provided ongoing support throughout this process,
including design assistance and compliance, to ensure the functional
requirements of the Studor Single Pipe System were being adhered to, as well as
local authority regulations.
Cost Comparison From these initial designs it was apparent that
the Studor Single Pipe System would offer significantly reduced pipework, which
could provide a corresponding level of savings when compared to more
traditional drainage systems that Christopher Contracting were familiar with.
On this basis, they opted to proceed with the installation
of the Studor Single Pipe System in the Harbour One building. Results Construction
was completed in May 2011 and the building’s first occupants took up residence
in November of that year. However, since that time the project has been used as
the subject of a detailed study into the costs of supplying and installing a
variety of high-rise drainage systems.
Findings from the study, which was commissioned by Studor
Australia Pty Ltd and conducted by independent designers and estimators,
indicate that the Studor Single Pipe System was certainly the most
cost-effective solution for the Harbour One building, offering savings of more
than 17% compared to a traditional Fully Vented System and more than 6% compared
to the Reduced Velocity Aerator Stack System that was utilised in the Harbour
Further information about the study, including the implications
for the design of cost-effective high-rise drainage systems, can be obtained by
downloading a copy of the report at www.studor.net or contacting Studor
International HQ on [email protected]