DIB-200
Encyclopedia
DIB-200 is a possible mixed use
supertall skyscraper
project proposed by Kajima Construction
and designed by Sadaaki Masuda and Scott Howe. If constructed, it would be 800 metres (2,625 ft) tall. The name stands for Dynamic Intelligent Building of 200 storeys.
The design consists of 12 cylindrical modules 50 metres (164 ft) across and 200 metres (656 ft) long, which are stacked one on top of the other to form four towers that rise to different heights from the corners of a quadrangle
at the base. One tower is two modules high, two towers are three modules high, and the fourth tower consists of four modules and climbs the full 800 metres. The modular design would help keep down costs and make technical problems more manageable. The gaps between the modules are designed to reduce wind loading
on the structure.
The design has been criticized for looking as if it owes more to engineering pragmatism
than architectural flair. However, Sadaaki Masuda claims that they could do little to influence the overall appearance of DIB-200 once the module had been designed and the parameters agreed upon. He believes his company is right to want a technically feasible scheme that, however ambitious, is realistic by today's standards. Scott Howe sees their contribution as helping to make the building a pleasant place for a population equivalent to that of a medium-sized town.
The first two tiers provide office space for about 50,000 people, on the third tier there will be a hotel
with 2,500 rooms, while the top tier is a residential block for more than 300 homes. Despite the structure's extraordinary height, Howe talks of "putting some horizontal into the building", of "artificial ground levels and no bottlenecks moving up and down the building". People will use high-speed lifts to shuttle between tiers, and slower ones to reach individual floors. Though Kajima is sticking with proven technology, it is taking conventional lift design to the limit with cables as long as 600 metres to provide the building's most direct service. Between tiers, horizontal sky lobbies will link the towers, and contain shops, sports and cultural centres.
Mixed-use development
Mixed-use development is the use of a building, set of buildings, or neighborhood for more than one purpose. Since the 1920s, zoning in some countries has required uses to be separated. However, when jobs, housing, and commercial activities are located close together, a community's transportation...
supertall skyscraper
Skyscraper
A skyscraper is a tall, continuously habitable building of many stories, often designed for office and commercial use. There is no official definition or height above which a building may be classified as a skyscraper...
project proposed by Kajima Construction
Kajima Construction
( is a Japanese construction company. Founded in 1840, the company has its headquarters in Moto-Akasaka, Minato, Tokyo. The company is known for its DIB-200 proposal.-Demolition Technology:...
and designed by Sadaaki Masuda and Scott Howe. If constructed, it would be 800 metres (2,625 ft) tall. The name stands for Dynamic Intelligent Building of 200 storeys.
The design consists of 12 cylindrical modules 50 metres (164 ft) across and 200 metres (656 ft) long, which are stacked one on top of the other to form four towers that rise to different heights from the corners of a quadrangle
Quadrangle (architecture)
In architecture, a quadrangle is a space or courtyard, usually rectangular in plan, the sides of which are entirely or mainly occupied by parts of a large building. The word is probably most closely associated with college or university campus architecture, but quadrangles may be found in other...
at the base. One tower is two modules high, two towers are three modules high, and the fourth tower consists of four modules and climbs the full 800 metres. The modular design would help keep down costs and make technical problems more manageable. The gaps between the modules are designed to reduce wind loading
Structural Dynamics
Structural dynamics is a subset of structural analysis which covers the behaviour of structures subjected to dynamic loading. Dynamic loads include people, wind, waves, traffic, earthquakes, and blasts. Any structure can be subject to dynamic loading. Dynamic analysis can be used to find dynamic...
on the structure.
The design has been criticized for looking as if it owes more to engineering pragmatism
Pragmatism
Pragmatism is a philosophical tradition centered on the linking of practice and theory. It describes a process where theory is extracted from practice, and applied back to practice to form what is called intelligent practice...
than architectural flair. However, Sadaaki Masuda claims that they could do little to influence the overall appearance of DIB-200 once the module had been designed and the parameters agreed upon. He believes his company is right to want a technically feasible scheme that, however ambitious, is realistic by today's standards. Scott Howe sees their contribution as helping to make the building a pleasant place for a population equivalent to that of a medium-sized town.
The first two tiers provide office space for about 50,000 people, on the third tier there will be a hotel
Hotel
A hotel is an establishment that provides paid lodging on a short-term basis. The provision of basic accommodation, in times past, consisting only of a room with a bed, a cupboard, a small table and a washstand has largely been replaced by rooms with modern facilities, including en-suite bathrooms...
with 2,500 rooms, while the top tier is a residential block for more than 300 homes. Despite the structure's extraordinary height, Howe talks of "putting some horizontal into the building", of "artificial ground levels and no bottlenecks moving up and down the building". People will use high-speed lifts to shuttle between tiers, and slower ones to reach individual floors. Though Kajima is sticking with proven technology, it is taking conventional lift design to the limit with cables as long as 600 metres to provide the building's most direct service. Between tiers, horizontal sky lobbies will link the towers, and contain shops, sports and cultural centres.