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Burj Khalifa "Khalifa tower", known as Burj Dubai prior to its inauguration, is a skyscraper in Dubai, United Arab Emirates, and is the tallest man-made structure in the world, at 829.8 m (2,722 ft).Construction began on 21 September 2004, with the exterior of the structure completed on 1 October 2009. The building officially opened on 4 January 2010, and is part of the new 2 km2 (490-acre) development called Downtown Dubai at the 'First Interchange' along Sheikh Zayed Road, near Dubai's main business district. The tower's architecture and engineering were performed by Skidmore, Owings and Merrill of Chicago, with Adrian Smith as chief architect, and Bill Baker as chief structural engineer. The primary contractor was Samsung C&T of South Korea.Records:→ Tallest existing structure: 829.8 m (2,722 ft) (previously KVLY-TV mast – 628.8 m or 2,063 ft)→ Tallest structure ever built: 829.8 m (2,722 ft) (previously Warsaw radio mast – 646.38 m or 2,121 ft)→ Tallest freestanding structure: 829.8 m (2,722 ft) (previously CN Tower – 553.3 m or 1,815 ft)→ Tallest skyscraper (to top of spire): 829.8 m (2,722 ft) (previously Taipei 101 – 509.2 m or 1,671 ft)→ Tallest skyscraper to top of antenna: 829.8 m (2,722 ft) (previously the Willis (formerly Sears) Tower – 527 m or 1,729 ft)→ Building with most floors: 163 (previously world trade center – 110)→ Building with world's highest occupied floor→ World's highest elevator installation (situated inside a rod at the very top of the building)→ World's longest travel distance elevators: 504m (1,654 ft)→ Highest vertical concrete pumping (for a building): 606 m (1,988 ft)→ World's tallest structure that includes residential space→ World's second highest outdoor observation deck: 124th floor at 452 m (1,483 ft) When it first opened, the observation deck was the highest outdoor observation deck in the World, but it has since been surpassed by Cloud Top 488 on top of Canton Tower.→ World's highest installation of an aluminium and glass façade: 512 m (1,680 ft)→ World's highest nightclub: 144th floor→ World's highest restaurant (At.mosphere): 122nd floor at 442 m (1,450 ft) (previously 360, at a height of 350 m (1,148 ft) in CN Tower)→ World's highest New Year display of fireworks.→ World's second highest swimming pool: 76th floor (world's highest swimming pool is located on 118th floor of Ritz-Carlton Hotel at international Commerce Centre, Hong Kong).
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