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Capital Gate

Capital Gate, also known as the Leaning Tower of Abu Dhabi, is a skyscraper in Abu Dhabi that is over 160 meters (520 ft) tall, 35 stories high, with over 16,000 square meters (170,000 sq ft) of usable office space. Capital Gate is one of the tallest buildings in the city and was designed to incline 18° west, more than three times the lean of the Leaning Tower of Pisa. The building is owned and was developed by the Abu Dhabi National Exhibitions Company. The tower is the focal point of Capital Centre.

Construction
Project timeline • • • • • • • • • • • • • • Foundation The structure rests on a foundation of 490 pilings that have been drilled below ground. The deep pilings provide stability against strong winds, gravitational pull, and seismic pressures that arise due to the incline of the building. Of the 490 pilings, 287 are in diameter and deep, and 203 are in diameter and deep. All 490 piles are capped together using a densely reinforced concrete mat footing nearly deep. Some of the piles were only initially compressed during construction to support the lower floors of the building. Now they are in tension as additional stress caused by the overhang has been applied. Superstructure Given the 18° lean of the building, the construction required two diagrid systems: an external diagrid defining the tower's shape and an internal diagrid linked to the central core by eight unique, pin-jointed structural members. The external diagrid comprises 720 sections of varying shapes, as it is based on the direction in which the tower leans. The external grid carries the weight of the floor while the internal diagrid connects with the external and transfers the load to the core, thereby eliminating the need for columns in the floor. == World record ==
World record
In June 2010, Guinness World Records recognized Capital Gate tower as the world's "farthest manmade leaning building". The new record shows that the Capital Gate tower has been built to lean 18° west, which is more than four times that of the Leaning Tower of Suurhusen. The recognition was given following a thorough evaluation by a Guinness-appointed awards committee, which began in January 2010, when the exterior was completed. == Architecture and design ==
Architecture and design
The building has a diagrid specially designed to absorb and channel the forces created by wind and seismic loading, as well as the gradient of Capital Gate. Capital Gate is one of only a handful of diagrid buildings in the world. Others include London's 30 St Mary Axe (Gherkin), New York's Hearst Tower, and Beijing's National Stadium. Capital Gate was designed by architectural firm RMJM and was completed in 2011. The tower includes of office space and the Andaz Hotel on floors 18 through 33. == See also ==
Source: Wikipedia ↗
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