The construction is very impressive to see. The movable roof part consists of two enormous semi-spherical steel and glass shells which literally ride across the semi-open, dome-shaped stadium roof which is also made of a complex steel construction.
One of the two shells weighs at least 1100 tonnes and during the opening and closing, each shell spans a distance of approximately 60 metres. To be able to move this heavy spatial structure smoothly and without excessive torque forces, Enerpac developed a strong hydraulic propulsion system with an advanced electronic control and operation system added to that. It is the first time that hydraulics is applied during the opening and closing of a movable roof.