Over the last few months the lock gates on the barrage at the dock in Büsum have been undergoing general refurbishment, some 35 years after being commissioned. Crane contractor Nolte from Hanover sent three Liebherr cranes to the site on the North Sea coast for the hoisting work involved in the process. In addition to the LG 1750 lattice boom mobile crane, an LTM 1200-5.1 was also on the site to take care of the set-up work. The 12 metre wide and 16 metre high gates meant a load of 101 tonnes on the hook block and lifting equipment.
To handle this load case at the enormous radius of up to 67 metres, the LG 1750 had been erected with a 49 metre lattice boom, a 56 metre luffing jib and the derrick boom. 570 tonnes of ballast provided sufficient counterweight for hoisting the steel gates.
Site manager Jürgen Peters: "The Liebherr LG 1750 was the ideal crane for this job."
The crane job on the Büsum barrage was far from routine as a result of the load case and the radius, together with the very constricted available space. "The LG 1750 was the ideal crane for this job because the slewing range for the derrick platform was very limited," explains Jürgen Peters, who planned the job and is responsible for major crane jobs at Nolte. At the beginning of June, he and his team completed the work smoothly and on schedule. Six weeks after the start of the 2.5 million euros refurbishment of the barrage, all the lock gates had been reinstalled.
