JOB OF THE MONTH Ӏ DECEMBER 2021


j The LTM 1160-5.2 is being supported by two other Liebherr cranes: an LTM 1090-4.2 and an LTM 1070-4.2. In order to reach some of the pylon erection sites the cranes have to travel to altitudes of up to 1800 metres above sea level. For the LTM 1160-5.2 this has meant negotiating gradients of around 23 percent, while the LTM 1090-4.2 and an LTM 1070- 4.2. have used access roads with gradients of up to 26 percent.


Snow chains


were required at times to access erection sites


SET UP CONFIGURATIONS To lift the pylons, which weigh up to eight tonnes, the LTM 1160- 5.2 has been set up in various configurations depending on the set-up area available and the height of the pylon being erected. In parts, the set-up area has


Set up areas are


restricted in places but all three cranes have Liebherr's VarioBase support system to help with this


been very restricted. All three Liebherr cranes, however, have Liebherr’s VarioBase support system – which Liebherr says has helped Prangl overcome the lack of space without compromising safety


or lifting capacity. For the highest pylons, the


LTM 1160-5.2 is set up with its maximum configuration. “Three telescopic extension, each measuring seven metres on the 62 metre boom, and the 19 metre double folding jib enable us to reach a maximum hoist height of 99 metres,” said Oliver Thum – technical external services specialist at Prangl. "We have bought a telescopic extension specially for this job. We have obtained two others from one of our other Liebherr cranes from our branch in Vienna.” These telescopic extensions can also be used for all current LTM models with lifting capacities from 100 to 180 tonnes.


Due to the inaccessible nature of some of the sites, however, some of the pylons have had to be erected using a helicopter and even cable cars. The work started in February


2021 and there was still snow at some of the jobsites in May. As a result, the cranes had to, at times, use snow chains to access the sites. Work is expected to continue until summer 2022, with a few months off for a winter break.


CRANES TODAY 11


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