X-Seed 4000:Tallest bldg to house 1 Million persons

The X-Seed 4000 is the tallest building ever fully envisioned, meaning that the designs for construction have been completed.

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 metres (13,123 ft) height, 6 km (3.7 mi) wide sea-base, and 800 floor capacity could accommodate five hundred thousand to one million inhabitants.

It was designed for Tokyo, Japan by the Taisei Corporation in 1995 as a futuristic environment combining ultra-modern living and interaction with nature.

Unlike conventional skyscrapers, the X-Seed 4000 would be required to actively protect its occupants from considerable air pressure gradations and weather fluctuations along its massive elevation. Its design calls for the use of solar power to maintain internal environmental conditions.

A sea-based location and a Mount Fuji shape are some of this building's other major design features — the real Mount Fuji is land-based and is 3,776 m (12,388 ft) in height, nearly 224 m (735 ft) shorter than X-Seed 4000.

Some estimate that the cost to construct the X-Seed 4000 structure may be somewhere between US$300-900 billion, in 2006 dollars.

Imagine living in such a building, travelling 4000 meters to reach the entrance.  Residents will not enjoy honking. Imagine living in the 800th floor and you forgot your mobile inside the car

Here are some pics and more details

http://www.inhabitat.com/2007/08/20/self-contained-tokyo-highrise-eco-city-x-seed-4000/