Last summer Rohrbach, Switzerland based timber and steel construction specialist Zaugg AG Rohrbach, which also provides crane and transport services, used the first Liebherr MK 120-5.1E mobile construction crane to roll off the production line to lift temporary metal roof structures at two construction sites in the centre of Bern, Switzerland. This was the crane’s debut job.
The crane is equipped with a 400 kW diesel engine. It can, however, also be powered by electricity using site power or mobile 63 amp power sources. As the job sites were in Bern’s busy old town Zaugg opted to use electricity – powering it via a Liebherr mobile Liduro Power Port LPO 100 for quiet, emissions-free lifting.
The temporary roofs being lifted were up to 20 metres long and weighed up to 2.5 tonnes. They were lifted to a height of around 20 metres and placed at a maximum distance of 45 metres.
This was no problem for the MK 120-5.1E which can lift loads weighing 2.1 tonnes at the tip of its 52-metre boom. The job site was in the narrow streets of Bern’s old town. Access was facilitated by the five-axle crane’s all-wheel steering.
Setup and dismantling was fast, reports Zaugg, aided by a small, optional, auxiliary crane attached to the lower end of the telescopic tower and operated via remote control.
“The crane is ideal for this work and provides us with the required performance parameters,” said Stefan Stettler, head of the crane department at Zaugg AG Rohrbach
