By combining suspension cables and steel arches the roof spans over 135 m. An innovative ventilation system supplies the hall with cool fresh air via blow-out nozzles arranged along the longitudinal facades.
The geometry of the roof, which is formed by a succession of one row of convex and one of concave shells, made of wooden sandwich panels, corresponds to the structural and technical requirements of the air conditioning of a natural ventilation allowing the natural lighting of the hall.