an engineered sequence to maintain overall structural stability of the crane. “We assessed the structural quality of the crane before commencing work in order to best plan for sectional dismantling,” continues Todd. “Aside from rust patches, the existing structural integrity of the crane actually wasn’t compromised much at all.” Sections of the crane were rigged to a Favelle FAVCO M2480D tower crane and separated from the remaining structure by oxy cutting from a work box rigged to the M120RX tower crane. Once separated, the sections were lifted down to the designated materials processing area and downsized. “We used a Favelle FAVCO M2480D to do the heavy lifting. The M2480D is the world’s largest capacity heavy lift tower crane and is capable of lifting some 330 tonnes. It has been used on some of Australia’s largest resource sector and civil engineering projects,” continues Todd. The M2480D deployed was chosen for its lift capacity and small footprint. To dismantle such large heavy sections required a crane capable of heavy lifts; Liberty Industrial was lifting out sections of the structure weighing up to 65 tonne. The M2480D’s small footprint was crucial given how limited the team was for workspace at ground level. “We then deployed a 33 tonne Volvo EC330LC excavator with a shear attachment to carry out the heavy duty downsizing. “Oxy-cutters assisted to further downscale and process scrap material and removed paint from the cut locations prior to cutting. The processed components were then transported to an offsite recycling facility.
Liberty Industrial were able to engineer an efficient design solution, reducing the proposed number of lifts from the planned 250 to just 70.
“The Department of Defence made access in and out of the site for our team very straightforward, although transporting oversized items out of the site did present a few logistical issues. “The usual constraints of working on a live site had to be taken into account, as well as available space for processing materials, which was limited. But overall the flow of materials off-site was very smooth,” he says. In all, approximately 1900 tonnes of steel was recycled. Another key difference with the Hammerhead Crane project for
The Hammerhead Crane was the largest such crane in the Southern Hemisphere when it was built in the 1950s. Liberty Indusrial were not only tasked with deconstructing the colossal structure, but preserving key historical components during the process
Liberty Industrial was the requirement that, in addition to the removal of the structure, the project had a substantial salvage component with the preservation of numerous heritage artefacts required. Components including the crane’s main hook assembly, hook platform and trollies and the driver’s cabin were carefully removed and transported to an off-site facility where they were decontaminated of their coating and refinished. Because of their value to the community it was imperative these items were not damaged or structurally altered during the removal and refinishing works, so a detailed methodology for the removal, relocation, refinishing and storage of the heritage components was developed. “In addition to the deconstruction work, we also prepared a detailed management plan for the removal, relocation, refinishing and storage of all the heritage components to ensure their condition was preserved,” says Todd. “We even fabricated a specialised frame for the crane’s enormous 25.7 tonne hook assembly, which was the largest heritage item we salvaged. Due to the oversize nature of that single item we had to transport it to the storage location under police escort.” With the successful preservation of some of Australia’s rarest industrial and maritime heritage completed, this project certainly showcased Liberty Industrial’s award-winning dismantling and salvaging capabilities.
Published on Apr 1, 2015
Our Autumn 2015 issue takes a look at some of the technical innovations, trends and challenges the scrap and demolition industries in Austra...