3 Tallest Buildings And Structures In The World

Burj Khalifa

Burj Khalifa (Arabic: برج خليفة‎ "Khalifa Tower"),known as Burj Dubai prior to its inauguration, is a skyscraper in Dubai, United Arab Emirates, and is currently the talle   manmade structure in the world, at 829.84 m (2,723 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) flagship 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.
The total cost for the project was about US$1.5 billion; and for the entire "Downtown Dubai" development, US$20 billion. In March 2009, Mohamed Ali Alabbar, chairman of the project's developer, Emaar Properties, said office space pricing at Burj Khalifa reached US$4,000 per sq ft (over US$43,000 per m²) and the Armani Residences, also in Burj Khalifa, sold for US$3,500 per sq ft (over US$37,500 per m²).
The project's completion coincided with the global financial crisis of 2007–2010, and with vast overbuilding in the country, led to high vacancies and foreclosures. With Dubai mired in debt from its huge ambitions, the government was forced to seek multibillion dollar bailouts from its oil rich neighbor Abu Dhabi. Subsequently, in a surprise move at its opening ceremony, the tower was renamed Burj Khalifa, said to honour the UAE President Khalifa bin Zayed Al Nahyan for his crucial support.
Due to the slumping demand in Dubai's property market, the rents in the Burj Khalifa plummeted 40% some ten months after its opening. Out of 900 apartments in the tower, around 825 were still empty at that time

Tokyo Sky Tree

The Tokyo Sky Tree, formerly known as New Tokyo Tower, is a broadcasting, restaurant and observation tower under construction in Sumida, Tokyo, Japan. It has been the tallest artificial structure in Japan since 2010. The tower reached its full height of 634.0 metres (2,080 ft) in March 2011 but will not be finished until at least February 2012.
The project is being led by Tobu Railway and a group of six terrestrial broadcasters (headed by public broadcaster NHK). Construction of the tower is scheduled to be completed by February 2012, with the public opening on 22 May 2012. The completed structure will be the centrepiece of a massive commercial development located equidistant from Narihirabashi Station and Oshiage Station.
One of Tokyo Sky Tree's main purposes is as a television and radio broadcasting tower. Tokyo's current broadcasting tower, Tokyo Tower, is at 333 m (1,093 ft), and is no longer tall enough to give complete digital terrestrial television broadcasting coverage because it is surrounded by many high-rise buildings.
The Tokyo Sky Tree is currently the tallest tower in the world. It is taller than Canton Tower (600 m (1,969 ft)); the tallest structure on an island, taller than Taipei 101; and the second tallest structure in the world, after the Burj Khalifa in Dubai.

KVLY-TV mast

The KVLY-TV mast (formerly the KTHI-TV mast) is a 628.8 m (2,063 ft) tall television-transmitting mast in Blanchard, Traill County, North Dakota, United States, used by Fargo station KVLY-TV channel 11. Completed in 1963, it was the tallest structure ever built until succeeded by the Warsaw radio mast in 1974; that mast collapsed in 1991, making the KVLY-TV mast again the tallest structure in the world until the Burj Khalifa overtook it in 2008. It remains the third tallest structure in the world, and the tallest structure in the United States. It is a guyed mast, not a self-supporting structure, and is therefore not included in lists of tallest buildings. The height of the transmitting antenna itself is 113 feet (34 m) and is included in the height of the tower as the lattice tower itself ends around 1,950 feet (590 m).The tower weighs 864,500 pounds (392.1 t) altogether and takes up 160 acres (0.65 km²) of land with its guy anchors.The 113' antenna alone weighs 9,000 pounds.In 1989, daredevils climbed the tower and BASE jumped from it.