The glass railing runs in regular spirals in line with the single-flight stair floor plan. On the inner side of the stairs’ flight, a parapet-high steel stringer assumes the function of the railing with a diameter of approximately 1,790 mm. Indirect LED illumination is integrated into the handrail of the inner balustrade stringer. A special feature is the encasing of the steel core with Corian in the area of the gallery balustrade.
The outer stringer of the staircase structure is designed as a box-type stringer with an H-section and has a diameter of approximately 4,720 mm. At the same time, the stringer holds the curved panes of the glass railing.
By fixing the top and bottom of the stairs’ stringers to the floor below and the edge of the ceiling above, a self-supporting structure for the stairs is realised. Due to the transfer of the forces to the floor and/or ceiling, no additional wall supports or supporting columns are required. The folded tread supporting structure with 19 risers and a stairs’ head landing are welded between the stringers of the stairs.