Increase Bell AG, Basel

The project
The initial situation The building was a reinforced concrete structure with mushroom ceilings and restrained columns. The column grid of 9m also had to be maintained for the extension. The challenge Due to the high loads, the primary structure was realized in steel and the roof elements in timber construction.

The construction
In addition, an auditorium for 120 people with dimensions of 12 x 15 m is located in the center of the extension. The roof elements, which were designed as box girders, span the entire 12 m without intermediate supports. The roof structure consists of extensive greenery.

The challenge
The earthquake bracing posed a great challenge, since the Basel location is considered particularly vulnerable and the geometry of the roof, with 2 inner courtyards, is very twisted.