Dörflistrasse, Pfäffikon

The project
The new building with 17 apartments and an underground garage is located on two plots. From the first floor the building is made of wood. The exception is the staircase, which is made of reinforced concrete. The ceiling is made of solid wood, all walls are of stud construction. The building envelope is a compact façade with directly plasterable soft fiber boards. Partial areas are covered with wooden formwork. The superstructures are sound-optimized by Timbatec. The floor slabs could thus be reduced to a minimum height, but without creating acoustic deficits and large deformations. The increased sound insulation requirements were thus easily met.

The construction
The timber construction was done in stud construction with solid timber ceilings. Individual columns with beams clear larger areas. The use of steel and concrete in timber construction was avoided as far as possible. Thus, the underground garage, basement and staircase are the only reinforced concrete components. A structurally simple and efficient solution was sought to minimize settlement in the timber structure, and was found with load-transmitting beech dowels in the floor slab.

The challenge
Although this is a single building, two different builders were involved. The two parts of the building had to be separated with a fire wall. The load transmission and settlement prevention also had to be solved without the use of large amounts of steel and complex details.