A Liebherr LTM 1750-9.1 has installed tower cranes at a height of 147m for renovations on the Axa high-rise building in Cologne.
Needing an LTM 1150-5.3 as an auxiliary machine to help set up the crane, the machines – supplied by crane rental company Colonia – were brought in to prepare the work site for renovations on the building’s exposed aggregate concrete balconies that needed to be replaced.
The 147m high-rise building is heritage-listed, further complicating matters as noticeable changes to the building’s appearance are not permitted. To install the new, more weather-resistant balconies made of glass and aluminium, two tower cranes were placed on the building’s roof at the end of June.
To facilitate this, the LTM 1750-9.1 – already featuring a 52m telescopic boom – was configured with a 15m mast extension and a 91m luffing jib to lift various part of the two Liebherr tower cranes. According to Christian Kühne, Project Manager at Colonia, the entire ballast of 204 tonnes was used as well as all available equipment for the LTM 1750-9.1.
“With a maximum hook height of 152m, a building height of 147m, and a load capacity of 13.4 tonnes, the constellation for this operation was already impressive,” said Kühne. “Especially for special jobs like this, we can rely on Liebherr’s excellent quality and service.”
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Liebherr’s nine-axle machine was given a further boost by the Y-guying system that provides its machines with considerable load increases. Used in tandem with the variable jib system, higher crane capacities were able to be achieved for Colonia during the project.
As an all-terrain crane, the 800-tonne machine needs to be proficient when it comes to mobility and set up times. Spending just one week on the Rhine in Cologne, the LTM 1750-9.1 was configured in under two days.
Colonia currently has 26 Liebherr cranes in its fleet and will be adding four new machines from the German manufacturers in the near future.
Constructed in 1973, the 45-storey Axa high-rise building still accommodates around 1000 people and was Europe’s tallest residential building at the time of its inception.