HCD Davos Training Hall

10 timber trusses span the existing ice rink facility and the grandstand over 41 m without intermediate supports. The trusses are supported on both sides by two strut frames each. One strut frame is inclined inwards, while the other lies in the façade plane. The truss and strut frames together thus form a frame structure. This structural system is robust, allows the internal forces at mid-span to be reduced, and provides bracing for the hall in both the transverse and longitudinal directions.
As the 41 m-long trusses could not be transported in one piece, they were spliced at mid-span. The compressive forces at the splice in the top chord can be transferred easily using a grout mortar. To reduce the tensile forces in the bottom chord, which are difficult to transfer, a prestressing cable is installed. The remaining tensile force is transferred via bonded threaded rods.
Prefabricated rib elements are suspended between the top chords of the trusses as a secondary structure and connected to the top chords with fully threaded screws. Between the last two bays, a ribbed slab has been installed at the level of the bottom chords, enabling the spaces to be used as a gallery.