The weight of the tower is counter-balanced by the extension of its central concrete edge through the podium.
A gyroscopic levelling system keeps the cable car cabin horizontal while riding along the tower edge.
The tower inclination varies from 23 degrees to 63,7 degrees.
The observation deck is accessed by a 2-story cable car which ascends rails on the edge of the tower.
The development of new office spaces commenced in early 2003, consisting of about 20,000 square meters (210,000 square feet) of renting space among twelve floors of the tower. The curtain wall sections of the tower will also be replaced.
World's tallest inhabitable leaning tower.
The tower initially reached a height of 536 feet and 11 iches in 1976, but did not reach its full elevation of 575 feet until 1987.
The tower was designed simply to be a mast for the cables holding up the roof of the Olympic Stadium. In 2002, the concept was born to convert the mast into offices with a 2-floor observatory at the top and a sports centre at its base.
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