Global tower crane expert, Marr Contracting, has completed a 180-tonne lift on the Kangaroo Point Green Bridge in Brisbane.
With construction located on the Brisbane River, the key challenge for the project was how to construct the bridge mast while minimising impacts on public ferries and private vessels. Connect Brisbane, a BESIX Watpac-led consortium who is delivering the project, engaged Marr early to produce a lifting solution that supported the consortium’s preferred construction methodology and addressed the challenges of constructing the 95m-tall mast.
Working in tandem with Marr’s Brisbane-based engineers, Robert Bird Group, Marr developed a solution using the world’s largest capacity tower crane, its M2480D Heavy Lift Luffing tower crane, assembled with a 64m-long boom on a platform in the middle of the river. According to BESIX Watpac Project Director, Rowan Riggall, early identification of the Marr crane as the most viable option was “instrumental” in the project’s success.
“After comparing barge crane and tower crane options,” he said, “the team confirmed the M2480D was the most suitable crane in the Australian market capable of lifting the fully assembled mast head.”
The Marr tower crane needed to lift the 25m-tall, 180-tonne prefabricated steel masthead to a height of 95m – an accomplishment that “wouldn’t have been possible” with crawler cranes in the job’s unique circumstances, according to a press release from Marr Contracting. The lift was the heaviest lift to date in Marr’s scope of work, which has seen more than ten major lifts and general construction lifting requirements over the last 12 months.
“Reaping the benefits of modularised construction with fewer, heavier lifts is not only helping to deliver a safer, more productive site,” said Marr’s Managing Director, Simon Marr, “but also allowing our client to share the economic benefit delivered by the project by engaging more South-East Queensland businesses away from the work front.”
The Kangaroo Point Green Bridge is an initiative undertaken by the Brisbane City Council to connect Brisbane’s CBD to the eastern suburbs. The bridge, at a length of 460m, will be one of the longest span cable stay pedestrian and cycle bridges in the world.
Construction on the bridge is expected be completed in 2024.
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