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The tallest building in the world (2,717 ft height )
- Burj Khalifa
Burj Khalifa ("Khalifa Tower"), is the tallest man-made structure ever built, at 828 m (2,717 ft). It was formerly known as Burj Dubai and named to Burj Khalifa, in honor of United Arab Emirates president and emir of Abu Dhabi Khalifa Bin Zayed.
The construction began on 21 September 2004, with the exterior of the structure completed on 1 October 2009 and the building officially opened on 4 January 2010.

“Work began in 2004 and moved rapidly. At times, new floors were being added almost every three days. During the busiest construction periods, some 12,000 people worked at the tower each day, according to Emaar. Low-wage migrant workers from the Indian subcontinent provided much of the muscle.”

The tower was designed by Chicago-based Skidmore, Owings & Merrill, which has a long track record in engineering some of the world's tallest buildings, including the Willis Tower. William Frazier Baker, an American is the structural engineer of this Structure.

The total budget for the Burj Khalifa project is about US$1.5 billion. Antenna or spire height is 828 m (2,717 ft) and total Floor area is 334,000 m2 (3,595,100 sq ft)

The price of office space at Burj Khalifa had reached US$4,000 per sq ft (over US$43,000 per m2) and that the Armani Residences, also in Burj Khalifa, were selling for US$3,500 per sq ft (over US$37,500 per m2) as on Jan. 2010.
Burj Khalifa ("Khalifa Tower") has many distinctions in its credit.

• Tallest skyscraper to top of spire: 828 m (2,717 ft) (previously Taipei 101 – 509.2 m (1,671 ft))
• Tallest structure ever built: 828 m (2,717 ft) (previously Warsaw radio mast – 646.38 m (2,121 ft))
• Tallest extant structure: 828 m (2,717 ft) (previously KVLY-TV mast – 628.8 m (2,063 ft))
• Tallest freestanding structure: 828 m (2,717 ft) (previously CN Tower – 553.3 m (1,815 ft))
• Building with most floors: 160 (previously both 1 and 2 World Trade Center – 110)
• World's highest elevator installation
• World's fastest elevators at speed of 64 km/h (40 mph) or 18 m/s (59 ft/s)previously Taipei 101 – 16.83 m/s)
• Highest vertical concrete pumping (for a building): 606 m (1,988 ft) (previously Taipei 101 – 449.2 m (1,474 ft))
• Highest vertical concrete pumping (for any construction): 606 m (1,988 ft) (previously Riva del Garda Hydroelectric Power Plant – 532 m (1,745 ft)
• The first world's tallest structure in history to include residential space
• Highest outdoor observation deck in the world
• World's highest mosque (located on the 158th floor)
• Elevator with the longest travel distance in the world
• Tallest service elevator in the world
• World's highest installation of an aluminum and glass façade, at a height of 512 m (1,680 ft)

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