Overnight bridge installation uses Liebherr cranes
Liebherr mobile cranes help to expand bridge on the River Spree
Two Liebherr LG 1750 lattice boom mobile cranes have been used in the overnight installation of a bridge on the River Spree in Berlin, Germany.
The machines, which were operated by a team from H N Krane and Maxikraft, were positioned on either side of the river. Together, they hoisted into place tailor-made sections designed to widen the existing Friedrich Bridge: one of the main access routes to Berlin Museum Island.
The refurbishment of Friedrich Bridge was conducted as part of a wider investment programme for Museum Island, which holds UNESCO World Heritage Site status. As only pedestrians and cyclists are permitted to use the bridge, it is of particular importance tourism at the site.
The LG 1750 lattice boom mobile cranes were each fitted with a 35m SL main boom and 245 tonnes of ballast. The total weight of the bridge sections lifted as part of the expansion was 210 tonnes. This sizeable job could only be carried out at night as it necessitated the closure of the River Spree waterway and neighbouring transport routes.
The newly installed sections have increased Friedrich Bridge’s width from 12.5m to 27m. This expansion restores the modern bridge to the size of its predecessor, which was built in 1894. The existing bridge, which dates back to 1981, has been retained.