The Men from Marr’s was approached by Brookfield Multiplex Services and their client, the Australian Government’s Department of Defence, for support in developing a craneage methodology for dismantling an historic crane on Sydney Harbour.
Working in a confined space on an operational naval base that needed to be accessible to naval ships added to the challenges of dismantling the heritage-listed crane components on a wharf with limited load capacity and a site prone to difficult weather.
Working with our partner on the project, Liberty Industrial, we designed a piled foundation embedded into the seabed to which allowed our cranes – a M2480D and M120RX – to operate from a free-standing base without placing any load on the existing wharf.
“We were able to reduce the proposed number of lifts from the planned 250 to 70 … and minimised the safety risks involved.” – Todd Solomon, Project Manager, Liberty Industrial.
The Men from Marr’s was approached by Brookfield Multiplex Services and their client, the Australian Government’s Department of Defence, to develop a solution for dismantling an historic at the Garden Island Naval Base on Sydney Harbour
Working with our partner on the project, Sydney based demolition contractor, Liberty Industrial, the project also required us to salvage heritage-listed parts of the 61-metre high, 250 tonne capacity hammerhead crane.
As an operational naval base exposed to difficult weather conditions, the site came with a number of challenges – a restricted working space, limited weight load capacity on the existing wharf, logistical issues with getting trucks with over-sized loads in and out of the site. We also had to ensure minimal disruption to dock operations and ensure that the heritage components of the crane were not damaged or altered during the process.
To overcome the space and weight-bearing issues on the site we built an off-wharf steel structure embedded into the Harbour seabed which allowed the Favelle Favco M2480D and M120RX mobile tower cranes to work from a freestanding base.
With the cranes in place, the hammerhead crane was dismantled in sections weighing up to 65 tonnes by oxy cutting each section from a workbox attached to the M120RX and then rigged to the M2480D before being lowered to the ground for dismantling.
The project was completed within six months with all heritage items safely recovered and removed from the site. The efficient design solution successfully reduced the proposed number of lifts from the planned 250 lifts to 70.
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