process, is no mean feat, both from a design and a construction
point of view.
Underpinning of the foundations was undertaken by mining
under the existing lower level suspended slabs, firstly by
excavating using remote controlled Bobcats with their hoods
cut off and then installing mini precast piles.
Special consideration had to be given to access to the workface
for the installation of most of the steelwork. The loading limitation
on the rooftop carpark slab was only 2,0kPa with the maximum
vehicle weight limited to 5,000kgs. The tower crane that was
installed by the main contractor on the site covered only 60% of
the rooftop cinema complex area and had limited load capacity at
radius. A number of the internal structures were designed with
plate web girders spanning in excess of 15 metres which had to
be manhandled into position and hoisted by scaffold tower and
chain blocks.
Loads of up to 3,5 ton and lengths of over 18m had to be
trolleyed through and around the cinema structure to then be
hoisted to final level by building high scaffold towers over them
and pulling them up with suitable capacity chain blocks - an
extremely time consuming and expensive means of erection.
Connection design, particularly between the numerous beams
throughout the lower levels of the cinema complex and all the
Steel Awards
Bond-Dek slab support beams, was a major cost-saving item
from a fabrication point of view. Minimal, if any, welding was
employed, rather opting for bolted connections with back to back
angles bolted through the incoming beam webs to achieve all end
plate connection details.
Due to the high visibility of the building, great care was given to
the aesthetics. The building form consisted of scalloped segments
with sloped Kingspan side cladding & aluminium roof sheeting.
Client / Owner / Developer: Liberty Life
Architect: Batley & Partners
Structural Engineer: Aurecon Group
Quantity Surveyor: NWS Quantity Surveyors
Project Manager: Focus Project Management
Main Contractor: Stefanutti Stocks Building Gauteng
Steelwork Contractor and Nominator:
Tass Engineering
Structural Steel Detailer / Detailing Company: 3DStruct
Erector: On Par Erection Works
Metal Roofing and Bond-Dek Supplier:
Global Roofing Solutions
Bond-Dek & Shear Stud Installation: Builcon
Roofing and Cladding Contractor: Chartwell Roofing
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