HIGH-RISE CONSTRUCTION Ӏ SECTOR REPORT
Marr installs 120 tonne modularised sections in single lifts
In Australia, Powerhouse Parramatta, currently being constructed by Lendlease on behalf of the NSW Government, will be the largest museum in NSW at 30,000 square metres, with more than 18,000 square metres of exhibition and public space including Australia’s
largest column-free exhibition space. Designed so that its exterior superstructure is a celebrated architectural feature, the museum’s two buildings feature three types of steel lattices as an exoskeleton. With the structural support for the trusses that achieve the
column-free exhibition space sitting on the exterior of the building, the challenge from a construction point of view was how to install the heavy steel trusses and deliver the project to the architectural team’s vision. Lendlease engaged heavy lift tower crane specialists Marr Contracting during the planning stage. Marr’s solution was to install three Heavy Lift Luffi ng (HLL) tower cranes including a 330-tonne capacity Favelle Favco M2480D, a 150-tonne capacity M1280D and a 96-tonne capacity M860D. By allowing bigger, heavier modularised sections of the exoskeleton including steel trusses weighing up to 120 tonnes to be installed in a single lift, the cranage methodology will reduce the number of lifts required and decongest the site. According to Marr’s Design & Engineering Manager, Andrew Coffi n,
“From an engineering standpoint this project is a signifi cant challenge due to its complexity. The key was understanding the desired approach to building the project and designing the crane solution around that idea.” “It took vision, innovation and collaboration to design a cranage solution that will deliver this amazing project” said Marr’s managing director, Simon Marr, “It’s a great example of achieving a better solution for the project team by asking ‘how do you want to build the project?’ and designing the cranage solution around a construction methodology instead of construction being driven by the limitations of the crane as we are constantly seeing in other parts of the world.” With sustainability sitting at the heart of the building and its
construction, Powerhouse Parramatta will be Parramatta’s fi rst public 6 Star Green Star Building. It is also one of the fi rst projects in Australia to use 100% renewable diesel (HVO100) in Marr’s cranes working on the project. Powerhouse Parramatta is expected to be completed in late 2024.
Leong Kwong-Joon, regional
product manager for tower cranes at Manitowoc. “Topless tower cranes are ideal for large infrastructure projects or modular developments and a host of other applications, and with the Potain MCT 1005 M50 we’ve created a model with a vast range of jib lengths and capacities that is capable of meeting almost every task demanded of it.” The MCT 1005 M50 arrives on
the market just over six months after the launch of the Potain MCT 805, which was previously the largest Zhangjiagang-produced topless Potain crane when it launched in April 2022.
40 CRANES TODAY
NEW SHAPES We said at the start that hammerhead and flat-top tower cranes have hardly changed in basic design. This is perhaps not so true of luffers. In those there is still room for new shapes and concepts, and several manufacturers have been at work on precisely that. One of them is ENG in Italy:
its new hydraulic ETH luffer does not have a counter-jib. This, the company says, makes it unique. Without a counter-jib it takes up minimal room on a construction site which, of course, allows more efficient operations in tight spaces. The genesis of the design, says ENG, is its experience in
building derrick cranes, used for disassembling internal climbing cranes on high-rises under construction; its hydraulic luffer is based on the same crane. The ETH series comes in four capacities, from 8t to 16t, with jib lengths up to 60m. ENG also has its EDL series of hybrid cranes that can work as both a fixed-jib and as a luffer. They have a flat mode, as normal, but the operator can change at will to a luffing mode. The range is also unusual in having a double counterweight: they work in tandem, and are claimed to give extra stability. The latest model in the range is the 16t EDL 230
Credit: Images for Business
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