Some tall structures and skyscrapers have been proposed that have not yet been built, and may never be. Some structures have been proposed, but construction was never begun, or if begun never completed, and the plans have subsequently been abandoned.
The Space Elevator is a hypothetical structure that would consist of an approximately 36,000 km (22,000 mi) long cable connecting a point on or near the equator to an object, possibly a captured asteroid, in geostationary orbit.
The Launch loop concept has been proposed for the purposes of orbital launch which would be 80 km high, and would have a cost of around $10 billion.[1]
The X-Seed 4000 is the tallest building ever fully envisioned. The X-Seed 4000 "was never meant to be built," says Georges Binder, managing director of Buildings & Data, a firm which compiles data banks on buildings worldwide. "The purpose of the plan was to earn some recognition for the firm, and it worked." Its proposed 4,000 m (13,000 ft) height, 6 km (3.7 mi) wide sea-base, and 800 floor capacity could accommodate five hundred thousand to one million inhabitants.
The Ultima Tower is a proposed 3,217 m (10,554 ft) skyscraper.
The Dubai City Tower is a proposed 400 floor, 2,400 m (7,900 ft) tall building to be built in Dubai, consisting of 6 outer buildings entwining a central core.
The Shimizu Mega-City Pyramid is a proposed project for construction of a massive pyramid over Tokyo Bay in Japan. The structure would be approximately 14 times higher than the Great Pyramid at Giza, and would house 750,000 people. If built, it will be the largest man-made structure on Earth. The structure would be 2,004 m (6,575 feet) high and would answer Tokyo's increasing lack of space.
The Al Jaber Tower in Kuwait City designed by Italian architect Omero Marchetti, part of the planned "ethic city". If built the Al Jaber Tower would reach 1852 m.
A mile-high Eco-Tower in London, consisting of 500 stories[2] and 1500 metres tall.[3]
The Bionic Tower is a proposed vertical city, an extremely large building designed for human habitation, designed by Spanish architects Eloy Celaya, and Mª Rosa Cervera and Javier Gómez Pioz. It would have a main tower 1,228 m (4,029 ft) high, with 300 stories that would house about 100,000 people.
The proposed Sky City 1000 is a possible future urban supertall skyscraper project aimed at helping put an end to major congestion and lack of greenspace in the Tokyo, Japan metropolitan area. The plan consists of a building 1,000 m (3,281 ft) tall and 400 m (1,312 ft) wide at the base, and a total floor area of 8 km² (3.1 sq mi).
Miapolis is a proposed supertall skyscraper planned for construction on Watson Island in Miami, Florida. If approved, constructed, and completed the building would stand at 3,200 feet (975 m), with 160 floors.
DIB-200 is a possible mixed use supertall skyscraper project proposed by Japanese Kajima Construction, and designed by Sadaaki Masuda and Scott Howe, that if built, would be 800 m (2,625 ft) tall.
India Tower (previously known as Park Hyatt Tower; also known as Dynamix Balwas Tower or DB Tower) is a 720 m supertall skyscraper proposed for construction in Mumbai, Maharashtra State, India. In January 2010, the Brihanmumbai Municipal Corporation gave the official go ahead for its construction on a site located at Charni Road, Marine Lines, just north of the city's historical district.[5]
The Digital Media City Landmark Building, is proposed for construction in Digital Media City, Seoul in South Korea, is expected to be 640 m (2,100 ft) tall and have 130 floors. When completed, it would be the second tallest building in the world with the tallest observatory and hotels in the world. Construction is expected to start in 2010,and will be completed in April 2015.
In USA at several sites, broadcasting towers with heights between 600 and 610 metres are planned according to the FCC-database. Some of them will be built close to existing towers of similar height, making them the tallest twin-towers in the world.
The Port Tower is a proposal for Karachi, the financial capital of Pakistan. If completed it would reach a height of 593 m (1,947 ft), representing the independence year of Pakistan (1947).
The Houston Tower was an envisioned skyscraper that would have been nearly 1.3 miles tall (6864 ft/2092 m) and taken up nine city blocks in Houston.
The Aeropolis 2001 was a proposed project for construction of a massive 500-story high-rise building over Tokyo Bay in Japan. It was proposed to be a 2,000 m (6,562 ft) high building.
Nakheel Tower (previously Al Burj) was a proposed skyscraper, planned for Dubai, UAE. It was expected to be approximately Template:M to ft tall[10] but the project was cancelled in November 2009 as a result of the 2009 financial crisis in Dubai.
Until late 1995, there were plans to rebuild the collapsed 646 m (2,119 ft) Warsaw Radio Mast to its previous height on the same site, using the basements of the old mast. Although some refurbishment of the basements started, work was canceled after violent protests by local residents, who feared harmful radiation effects from the high-power transmitter served by the antenna. A new transmission facility with two smaller masts measuring 330 and 289 m was built as a replacement in 1998-99 at Solec Kujawski.
Eaton's / John Maryon Tower was a planned 503 m (1,650 ft) (686m to spire) tall building in Toronto in 1971.
The Grant USA Tower was planned by developer Harry Grant, who started New York Apple Tours. The building was to be completed in 1986 in Newark, New Jersey and to be the tallest hotel, tallest building and tallest structure. Harry Grant went bankrupt and the building never broke ground. [12]
The Palace of Soviets in Moscow, planned in 1932, was to be 415 m (including a 100 m Lenin statue), and would have been the tallest building in the world at the time if completed. Construction was halted during World War II, during which the uncompleted structure was partially dismantled; its foundations were later to serve as the world's largest open-air swimming pool before being razed in 1995.
During the Russian October Revolution of 1917, Vladimir Tatlin designed a structure named The Monument to the Third International, which was to serve as the international headquarters of the Komintern. Better known as the Tatlin Tower, the structure was to rise to a height of 400 m (1,312 ft), which would have made it by far the tallest building in the world at that time, but the time and resource shortages that resulted from the Russian Civil War halted the project.
Watkin's Tower in Wembley, London was planned in 1891 to surpass the Eiffel Tower by 50 m (164 ft), but construction stopped before that height was reached due to unstable land. The tower remnants were dismantled in the 1900s, and the site was redeveloped as Wembley Stadium.
Phare du Monde, was a project for a 701 metres tall observation tower for the world exhibition in Paris, 1937. It was planned as concrete tower similar like modern TV tower, but also with a ramp for drive up access.
7 South Dearborn in Chicago was planned in 1999 to be 610 m (2,001 ft).
Construction was cancelled on the Grollo Tower (named after the architect) in Melbourne's developing Dockland precinct in April 2001 after Melbourne's Docklands Authority ruled it out of the tender for development of the Batman Hill's precinct. The area is now occupied by a mixture of smaller commercial and residential buildings. The Grollo Tower would have been the world's tallest building at the time at 560m (1837ft) tall.
A series of super-tall sky-scrapers were planned for the major Australian cities of Melbourne, Brisbane, Sydney and Perth from 1985-95 but were all cancelled. The plans included (in order of height) the Grollo Tower (mentioned above), Brisbane Central Tower (450m/1476ft, Brisbane), Minuzzo Tower (450m/1476ft, Brisbane), CBD-1 (445m/1459ft, Sydney), Melbourne Plaza (338m/1109ft, Melbourne), City Tower (305m/1000ft, Sydney) and the Westralia Tower (287m/941ft, Perth). The buildings would have been some of the tallest buildings in the world at the time, but were cancelled mainly due to their unnecessary heights which would have dwarfed all surrounding buildings
The Ultima Tower is a hypothetical two-mile high skyscraper by architect Eugene Tsui that would be 3,217 m (10,560 ft) tall and comprise 500 stories if built.[13]
The Millennium Freedom Tower was a project to be located in Newport, Kentucky, United States was originally proposed in 1998 to be dedicated on Dec 31, 1999. The original height was a proposed 1,234 feet (376 m) and was later lowered to 1,103 ft (306 m). Pilings were driven in 1998, but construction never continued above ground.[14]
The World Science Tower was to be one of the world's tallest buildings, proposed in 1964. It was to be located near Larkspur, Colorado, U.S.A. Its design would have had an amusement park at the base.
The 500 m tall Dragon Tower in Jakarta, Indonesia was cancelled in 1990 due to the economic crisis.
At Psary, Poland a 440 metres tall tower is proposed for distributing DVB-T signals from the satellite station to TV broadcasting sites.[15] It will be, if built, the tallest man-made structure in Europe outside Russia.
