The new fixed roof structure, made of more than 9,000 tons of steel, consists of two 177 meters east-west trusses and four 144 meters cross trusses. The retractable roof slides on the inner cross trusses, divided into two panels composed of five 72×7 meters inflatable cushions between six 72.5 meters-span steel-composite hybrid trusses. At the ends are motorized bogies that carry out the translation and integrate the lifting mechanism.
The main trusses, which during assembly are the guide for the rest, transfer the vertical load to two new evacuation towers in the west and to two articulated pendulums integrated with the east building, which in turn take horizontal loads next to the towers, utterly independent of the existing structure.
The redevelopment of the stadium includes the installation of a video scoreboard or perimeter halo, with a metal structure hanging from the roof and composed of a series of longitudinally braced frames divided into nine levels.
The Crown is a 16.5-meter-high lattice work, which in turn forms the lintel of the mega-portico formed by itself and the two towers. Its purpose is to support the skywalk and to enable the hanging of the Museum Beam, a mega truss that supports four levels between towers and which is accessed from the stadium by means of tilting slabs.
The East Building consists of 11 floors formed by 21 radial frames to the existing stadium, with two pillars, rigid nodes, transversal purlins, and a steel deck. At the ends, the building is stiffened with concrete cores that house lifts and evacuation staircases. In the upper zone, there is a spatial lattice crown, which is linked to the west through the corbels of the trusses at the bottom of the fixed roof, allowing complete circulation around the stadium.
The shape of the new exterior façade is obtained from the sweep of three curved lines that define the four main areas of the façade. Between the upper and intermediate façade, there is a crack that makes it independent from the rest of the parts. This intermediate façade of stainless-steel slats is supported by a structure of hollow steel ribs on the stadium axes and hangs from the new fixed roof, resting horizontally on the existing concrete ribs.
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