The overall concept for the new hall of the Rägelerhof groundwater pumping station provided for a travelling crane with a load capacity of 2000 kg, which was intended for transporting the required equipment when setting up the pumping station. Although the indoor crane only had to cover an area of 36 m², it was of great importance to optimally utilise the available space.

For this task, GIS designed a height-optimised solution with a double-girder underslung overhead travelling crane including an intermediate structure. The GP1000 electric chain hoist is mounted on a saddle between the two crane girders. This customised, space-saving design enabled the client to reduce the planned room height during the planning process, which ultimately had a positive influence on the costs of the overall project.

After completion of the construction work, the hall crane now serves as an annual service and maintenance aid and is available in case of unforeseen replacement of equipment, because the basic supply of drinking water must be ensured at all times.