Two Liebherr mobiles dismantle bridge12 June 2019
Two Liebherr LTM 1500-8.1 mobile cranes from crane and heavy haulage contractors Autokrane Schares from Bocholt and Dietmar Flossdorf from Bad Neuenahr recently dismantled a 100-year-old railway bridge in Essen, Germany.
The two 500t cranes had to lift 120t of steel in a tandem hoist.
The steel bridge over a four-lane road has been part of Essen’s cityscape for 100 years. But the time had come for the ailing structure to be removed for new buildings. The great age of the bridge proved to be a challenge for planning the crane job, however, because there were no reliable figures for the precise weight of the structure.
After detailed advanced planning by external service executive Peter Voss and technical drawer Nicole Bröker, main contractor Schares decided to use two LTM 1500-8.1 cranes for the job, as they provided plenty of lifting capacity reserves. The cranes were prepared with 135t of ballast and their telescopic booms were each extended to 31.7m. The bridge had to be hoisted with a radius of up to 16m. It had first been released from the abutments by flame cutters. The heavy duty cranes hoisted the structure with ease.
The crane control systems showed that they were sharing a weight of 120t. The LTM 1500-8.1 cranes had plenty of reserves without having to install any telescopic boom guying.
Crane operators Bernd Janssen (Schares) and Thorsten Mahlberg (Flossdorf) manoeuvred the bridge as instructed by marshal Dominik Ussat (Schares) carefully between the two eight-axle cranes and placed it on the ground. Then it was time for the flame cutters to go back to work. The steel structure was removed once it had been cut into small parts.