Castellana Tower 259

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The Castellana Tower is a skyscraper in Madrid, located with three others within the complex called the Cuatro Torres Business Area (CTBA), in the Fuencarral-El Pardo district.The building was designed by architect Norman Foster and has two types of elevation.The tower has a double structure; a main reinforced concrete structure formed by the vertical cores that form a frame to support the weight of the building and the horizontal wind forces; and the secondary metal structure that forms the various levels, grouped into three blocks of eleven, twelve and eleven floors.The secondary structure of steel beams is designed based on large spans of up to 15 x 18 metres between supports. Because of this structure of exterior cores and large spans, a very extensive office surface area is achieved that is practically unobstructed, with identical repetition in height that endows the building with flexibility and rationalisation for optimum architectonic and commercial exploitationThe building construction includes another group of technical buildings, well above the roof over the last office floor, thus creating an arch that visually lightens the highest part of the tower.The first technical floor is 24 metres from the ground and produces a spectacular reception hall, which is a completely open large-volume space. Included in the high part of this large hall space is an auditorium, with capacity for 300 people and which hangs from the technical floor structure.There are five parking floors below the grade line, with a total 1,150-vehicle capacity. The second basement has a double-height space with outside access for use as unloading docks.

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