PROJECT OF THE MONTH | FEBRUARY 2022
height 19 m) within the restricted height of the middle station, the available space in height was significant here. For this reason, an STK 50 chain hoist with extra-short headroom trolley and integrated special chain box was used. With a height reduced by 60%, the
extra-short headroom trolley achieves a maximum hook path, which is beneficial in confined spaces such as the middle station. The distance from the lower edge of the carrier to the base of the hook is 210mm or 185mm depending on the load capacity of a crane. The vertically mounted chain hoists used here are based on the standard components of the ST chain hoist program of Stahl CraneSystems. The patented chain guide has two
separate, synchronously running chains acting on a hook block. The middle station also has a maintenance section for the cable car gondolas, which has been equipped with a single-girder overhead travelling crane (load capacity 1.6t, lifting height 8.5m). Within the restricted height of the maintenance section, the crane must also be mounted as low as possible under the ceiling for maximum low start- up dimensions. “Since every millimetre counts here, we have once again chosen an STK 50 chain hoist with an extra-short headroom trolley,” said Haase. The valley station of the Nebelhornbahn
welcomes visitors with its impressive architecture of wood and glass, featuring a total of 39 laminated wooden beams that span an entirely glazed hall 10 metres in height. The single-girder suspension crane with a lifting capacity of 2 tons, as well as a lifting height of 8.5m, and above all the crane track that runs the entire length of the hall of more than 36m, had to be integrated into the building as harmoniously as possible. Instead of flat-rolled steels, a filigree was
developed for the suspension of the crane track, which involves a larger cross section in the attachment area on the laminated wooden beams and the crane track, while it tapers out in the middle. “Where lighter loads and forces are at
work, we were able to dispense with wider cross sections. As a result, the crane track suspension fits perfectly into the overall architecture of the valley station. For crane girders and crane track we also chose a colour that came closest to the hot-dip galvanised crane track suspensions,” added Haase. With regard to the length of the hall, the longitudinal extension of the crane track girders over the entire crane
R The roof of the mountain station is supported by laminated wooden beams.
track had to be taken into account, since the girders heat up more than usual when directly under the glass. However, due to the bevelled carrier joints at the ends, they adapt flexibly to temperature fluctuations, so that the crane rollers pass over them without disturbance. The crane construction project was
completed in March 2021, just in time for the planned opening date last summer. Henrik Volpert, CEO, Nebelhornbahn, said despite being in the middle of a global pandemic it saw the renovation as a great opportunity to advance a long-term project and to finish the construction earlier than planned. ●
www.hoistmagazine.com | February 2022| 21
R The crane track sits perfectly with the architecture of the structure. (All photos: Leitner AG)
R The single-girder suspension crane with a load capacity of 2t and lifting height of 8.5m
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