Plant, Equipment & Site Operations
RECONSTRUCTION IN THE AHR VALLEY: TWO LTM 1750- 9.1 CRANES ARE ERECTING THE NEW LANDGRAFENBRÜCKE
• Milestone in the reconstruction following the flood disaster in the Ahr Valley
• 105 tonnes successfully lifted in a complex tandem lift
• Set-up and crane work in extremely confined spaces
Two Liebherr LTM 1750-9.1 mobile cranes from Richter Kran und Schwerlast GmbH have installed key bridge elements and a steel structure for the new Landgrafen Bridge in Bad Neuenahr-Ahrweiler. The crane operation marks an important milestone in the reconstruction of infrastructure in the Ahr Valley – where the previous bridge had been completely destroyed during the flood disaster in July 2021.
Ehingen( Danube), Germany, 19 June 2026 – The clients were the construction company Leonhard Weiss GmbH & Co. KG and the heavy haulage and crane company Dietmar Floßdorf GmbH & Co. KG. The performance and precision of two Liebherr heavy-duty cranes from Richter Kran und Schwerlast GmbH were relied upon for the installation of the heavy bridge elements and steel structures.
Tandem lift of 105 tonnes at a reach of up to 38 metres The focus of the operation was the lifting of a bridge segment with a total weight of 105 tonnes, which was moved jointly by both LTM 1750‐9.1 cranes in a tandem lift. The maximum outreach was 38 metres. Both cranes were configured with a 28-metre luffing jib and 204 tonnes of counterweight each, thus providing the necessary reserves for the precise lift. use of a triangular spreader, which ensured that the load was distributed evenly between both cranes.
Lift in the early hours of the morning – for good reason The crucial main lift was deliberately carried out at 4 am. At this time of day, temperatures were at their lowest, thereby minimising the thermal expansion of the steel component. At higher temperatures, there would have been a risk that the bridge girder would not have fitted precisely into the designated abutments due to expansion.
“ The team and everyone involved did an excellent job. The operation went ahead without any complications or incidents – exactly as planned,” says Thorsten Mahlberg, project manager at Dietmar Floßdorf GmbH & Co. KG.
Due to the confined space directly on the banks of the River Ahr, the cranes had to be set up close together. An additional technical feature was the
Thermal expansion: In the early hours of the morning, two LTM 1750-9.1 cranes lift the heaviest bridge section into the abutments with pinpoint accuracy in a tandem lift.
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