Pasa, Stein am Rhein

The project
The upper floors are built entirely in wood. The exterior and interior walls consist of a timber frame construction, which transfers the loads from the floor slabs made of horizontal glulam. In the area of the balconies, slender steel columns were chosen for load transfer. The stairwell was made of encapsulated cross-laminated timber panels that meet the fire protection requirements for an emergency stairwell.

The construction
Precast concrete components were used only for the stair flights. The elevator shaft was also made of cross-laminated timber panels. This was initially erected in one piece over the entire height. The bracing was provided by the floor and wall slabs, which were formed with defined inner and outer walls. Underneath the two structures are the basement rooms and the underground garage.

The challenge
The exterior dimensions of the two multi-family buildings were adapted to the non-regular site layout. This results in irregular building footprints with sloping walls and recessed floors. The main challenge was the recessed attic floor, where the loads had to be transferred above the spacious living and dining area below. The loads could be transferred with the help of individual steel girders integrated in the floor slab.