The additional girders were needed for the roof to sustain the placement of a photovoltaic system.

The lattice girders each had a span of 35m and an individual weight of 11.5t. The main challenge was that the multi-purpose hall cannot be accessed from all sides and that the main crane, a 350t telescopic crane, had to be set up on the adjacent main street. For this reason, a diversion had to be put in place for the duration of the installation.

In order to guarantee that the lifting logistics ran as smoothly as possible, the metal parts were manufactured directly in the car park that is opposite the venue and affixed to the reinforced steel supports in the Koralmhalle using the 350t mobile crane.

This was all done within two days and the entire lifting process was supported by a 55t and a 70t telescopic crane.