Sihlhölzli sports facility
In 2001, three equipment sheds and a tower were added to the historically significant sports facility designed by architect Hermann Herter and planned by architect Roger Boltshauser. The new structures consist of load-bearing rammed earth walls combined with concrete ceilings and floors.
The solid clay layers directly bear the load of the concrete ceilings above – 75 tons of concrete rest on 65 tons of earth. Floor and ceiling slabs frame the open clay surfaces and give the structure a clear geometric order. The slabs appear to press the clay into the ground, reinforcing the effect of the material layering. Horizontal strips of trass lime mortar were inserted to protect against erosion. These give rhythm to the surface and lend it an ornamental character. In the interplay of light, color and shadow, the homogeneous, mineral material develops a strong presence and depth.
Arch. Roger Boltshauser
Statics: BKM Engineers
Lehm Ton Erde Baukunst GmbH
