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Tokyo Sky Tree
東京スカイツリー
New Tokyo Tower.jpg
Computer-generated rendering
General information
Location Sumida, Tokyo, Japan
Status Under construction
Groundbreaking 14 July 2008
Use Broadcast tower
Height
Antenna or spire 634.00 m (2,080.0 ft)
Roof 470.88 m (1,544.9 ft)
Technical details
Cost Approx. ¥40 billion
Companies involved
Architect(s) Nikken Sekkei Ltd.
Contractor Obayashi Corp.

The Tokyo Sky Tree (東京スカイツリー Tōkyō Sukai Tsurī?) (originally referred to as New Tokyo Tower) is a broadcasting tower under construction in the Narihirabashi/Oshiage area of Sumida ward in Tokyo, Japan. Once construction is completed, it will be the tallest artificial structure in Japan with a height of 634.00 m (2,080 ft). The present Tokyo Tower (333 m) is not tall enough to give complete digital terrestrial television broadcasting coverage, due to the construction of many nearby high-rise buildings in the central part of the Tokyo Metropolis.

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 December 2011, with public opening from spring 2012. The completed structure will be the highlight of a massive commercial development around Oshiage Station.

Contents

Design

Tokyo Sky Tree - Silhouette & cross section. Equilateral triangle (68 m of edge span) on the ground, gradually forming circle with graceful curves, and pure circle at 320 m elevation. (Drawn image)

The base of the tower has a structure similar to a "tripod", but from a height of about 350 m and above, the tower's structure is cylindrical to withstand very strong winds.

The tower also has state-of-the-art seismic proofing including a central shaft made of reinforced concrete.

Naming

During the period from 26 October to 25 November 2007, suggestions were collected from the general public for the name to be given to the new tower. On 19 March 2008, a committee chose six final candidate names: Tokyo Edo Tower, Tokyo Sky Tree, Mirai Tree, Yume Miyagura, Rising East Tower, and Rising Tower, with the official name to be decided in a nationwide vote. It was announced on 10 June 2008 that the official name of the tower would be Tokyo Sky Tree. Tokyo Sky Tree received around 33,000 votes out of 110,000 cast, with the second most popular name being Tokyo Edo Tower.[1]

Timeline

  • A ceremony was held on 14 July 2008, at the site to mark the start of construction.[2]
  • The foundations for the three main legs were completed on 6 April 2009.[3]
  • The projected height was increased from 610 m to 634 m to make it the highest self-supporting steel tower on 16 October 2009. 6-3-4 is Mu-sa-shi in Japanese wordplay goroawase.[4]
  • Construction of the tower reached a height of 100 m on 7 August 2009.[5]
  • Construction of the tower reached a height of 200 m on 10 November 2009.[6]
  • Construction of the tower reached a height of 300 m on 16 February 2010.[7]

Gallery

See also

References

General
Specific

External links

Coordinates: 35°42′41″N 139°48′48″E / 35.71139°N 139.81333°E / 35.71139; 139.81333

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