The building was designed on the lines of an "evolving spatial diagram" in two parts: firstly, a 3-level infrastructure housing the technical facilities and service areas; secondly, a vast 7-level glass and steel superstructure, including a terrace and mezzanine floor, concentrating most of the centre's areas of activity. The building's metal framework has 14 porticos with 13 bays, each spanning 48 m and standing 12.8 m apart. On top of the posts, on each level, are moulded steel beam hangers, measuring 8 m in length and weighing 10 tonnes. 45 m long girders rest on the beam hangars, which spread stress through the posts and are balanced by tie-beams anchored on cross-bars. Each storey is 7 m high floor-to-floor. The glass and steel superstructure envelops the free open spaces.