The job was completed on behalf of the German railway network Deutsche Bahn, and involved moving a 402t load in limited space with the LR 1600/2 crane, fitted with a 54m lattice boom.
The crane was set up on two reinforced concrete ramps, for which 12 piles were driven into the site to a depth of 13m to enable the ramps to withstand pressure of 507 kilonewtons per square metre.
The LR 1600/2 was fitted with 565t of ballast, to lift a total of 402t including the bridge, cross beam and attachment equipment. A Liebherr LTM 1200-5.1 crane and LTF 1045-4.1 were also used for set-up and support work.
Before the 355t steel bridge was hoisted, the 40m truss construction was transported from the assembly site to the construction site on two parallel ten-axle SPMTs.
Kathrin Gottschang from the project management team at Deutsche Bahn Projektbau said: "Riga was the only supplier to offer a solution using just one crane. The concept they suggested was also the only one that included threading the cross beam through the bridge trusses."
The alternative solution — fastening the crane at the top of the structure — would have prohibited much of the work on the bridge from being carried out in advance of the hoisting work, said Liebherr.
