FEBRUARY 2022 | PROJECT OF THE MONTH


R A larger cross section in the attachment.


environmentally friendly and ecological construction methods in the project, including a new valley and middle station and the expansion of the Höfatsblick mountain station. The entire cable car technology, including all its controls and cabins, was delivered by Leitner based in Sterzing, South Tyrol. “We basically deal with all aspects of cable car technology systems worldwide. As the overall project planner for the Nebelhornbahn, we also took on responsibility for the mechanical assembly and electrical installations,” said Gerald Senn, construction site manager, cable car technology, Leitner. “With regard to the crane technology


for the individual stations, the systems had to be partly built into areas with very limited space and adapted to pre-existing building conditions and peculiarities. We appointed Huber Schmid as a partner for the project, because the company not only had the knowledge to implement the crane technology we wanted, but also offered solutions for the occasionally special


R The hoist (max. lifting height 19m) of the 2t crane in the middle station (Photo: Leitner)


interfaces that had to be considered. As a regional company, Hubert Schmid, in Markteberdorf, Germany, also ensured a reliable local service for crane systems,” said Jan Sorg, project engineer. Leitner. For Hubert Schmid, the project started in


mid-2020, whereby the assembly times of the cranes were based on the construction progress of the individual railway stations. “On average, we only had a few days for assembly and installation. Therefore, among other things, we pre-assembled the cranes in the factory,” said Rainer Haase, project manager, Hubert Schmid Bauunternehmen.


The mountain station of the


Nebelhornbahn, which is 1932m above sea level, proved to be a logistical challenge, because the cranes and components had to be transported to the operation site over narrow, steep mountain roads using the great skill and experience of the lorry drivers. “And we also reloaded our assembly materials and tools into all- wheel drive vehicles to reach the mountain station,” added Haase.


Senn said there were also challenges when installing the cranes themselves. The roof construction of the mountain station consists of laminated wooden beams. The monorail suspension crane with a load capacity of 1.6 tons had to be installed horizontally suspended when the roof was sloping. “The running track of the crane was therefore mounted on the stepped-like arrangement of laminated beams. Each individual suspension of the monorail is a special construction,” he said. The length of the crane’s monorail (maximum travel speed 40 m/min) is 13.42 m. A hoist with an ST 30 chain hoist, a lifting height of 8.5 m, a lifting speed of max. 8 m/min and a maximum cross travel speed of 20 m/min was also installed. The chain hoist featured a special chain box at the customer’s request. “In spaces with high interfering edges, the chain box sometimes hangs lower than the crane hook. Since cable car technology has many moving parts, a safety distance of at least 500mm must be maintained at all times. Therefore, a shortened chain box made of sheet steel was chosen for the chain hoist,” said Haase. Two cranes were installed at the middle station, one of which was a single-girder suspension crane with a load capacity of 2 tons and a maximum speed of 20 m/ min. This crane, with a crane track length of 28.92 m, was also attached to the laminated beams. In connection with this, it was necessary to take the longitudinal expansion of the laminated beams into account due to temperature fluctuations when connecting the beams for a smooth running of the rollers. Since all maintenance areas had to be easily accessible with the hoist (max. lifting


Q The monorail suspension crane with a load capacity of 1.6t is mounted in horizontal suspension when the roof is sloping.


20 | February 2022 | www.hoistmagazine.com


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