Skyscrapers

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Torre Agbar tower in Barcelona, Spain

Orange: Facade; Red: Core
Left: The facade wall thicknesses tapered from 50 to 30 cm. The adjustment of the VARIO girder wall formwork was done in 10 cm increments.
Right: The inner formwork of the core (suspended on a steel framework) is completely separated from the outer formwork as the working platforms in the domed area of the building cannot climb to the very top. These walls are concreted later with the slabs. The inner formwork, however, climbs together with the platforms right to the top.