Torre de Collserola: connecting Barcelona

The Torre de Collserola (also called Torre Foster) is an amazing telecommunication tower at the top of the Tibidabo hill from the Collserola mountain range in Barcelona, Spain. It was designed by the famous architect Lord Norman Foster and built in 1992 for the Olympic Games. The top of the pod, which has thirteen floors, reaches 152m (499 ft), but the top of the antenna reaches 288.4m (946 ft). The tower consist of three parts

a concrete shaft, whose diameter measures 4.5 meters
a tubular steel mast of 38 meters length
a 45-metre stretch of latticed steel, bringing the Tower to its full height,

The structure stands thanks to a large amount of cables: the lower guys are composed of 180 parallel strand cables (15 mm diameter) with a polyethylene covering, each; the upper aramide fibre guys are made of three series of 7 cables in parallel (56 mm diameter).

Facts

The 3,000 tons tower was built in 24 months, with a maximum of 300 people working on Tower at one time during construction, under the supervision of the civil engineer Ramón Pedrerol Jardí and assisted by the civil engineer José Manuel Roigé Solano. The tower cost $36.6 M.