The structure consists of two roof coverings each spanning approximately
304m and varying in width from 60m to 100m. When joined, the inside perimeter
of the two coverings provides an elliptical opening over the football field of the main stadium.
Each covering is supported by a curved truss structure consisting of two arches: an upper ARCH TUBE
and a lower TORSION TUBE. The tubes are 3m in diameter with a wall thickness of up to 90mm.
The two arches are connected with cables.
The construction of the arches required the bending of steel plate of up to 90mm in thickness. To achieve this, the largest steel press in Europe, located at the S.Giorgio di Nogaro plant of Costruzioni Cimolai Armando S.p.A, was used. The press is 22m tall by 20m long and has a 15m blade.