In order to optimise the exhibition space, solutions were sought from the 1920s to avoid columns and pillars in the interior.
The special feature of this hall is its roof of originally 100 x 140 metres that was built without columns. In 1928, this was the largest hall of its type in the world. Skylight glazing has been inserted in the ceiling at a height of 20 metres to illuminate the room evenly with daylight. The roof is supported by a frame construction with originally seven trusses (visible on the outside as the highes parts of the construction), which make it possible that no pillars had to be built inside.
However, not everything about the hall was new. The exterior walls were used from a previous hall.
During the Second World War, three of the seven trusses on the north side were destroyed. In 1950 the building was rebuilt. The hall until now has only four trusses and was given the glass facade at the northern entrance zone, that has been preserved to this day. The former exterior walls were demolished and supplemented by new extensions. As a result, the hall is no longer 140 metres long, but only 120 metres. In 1980, the exterior facade was changed. The original pumice concrete was exchanged for washed concrete slabs, still attached to the building today.