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Top 10 world's tallest steel buildingson Sep 27, 2010
There was a time when building skyscrapers with steel as the main structural element was core to constructing exceptionally tall buildings.
It wasn’t until the 1960s however, when a vibrant young engineer of Bengali descent entered in to the fray and offered new systems designed to allow skyscrapers to reach new heights.
The late Fazlur Khan is considered the father of modern skyscraper design. His tubular structural engineering designs, first introduced while he was working at Skidmore Owings and Merill’s Chicago office, quickly transformed the city’s skyline. Most US buildings over 40-storeys constructed since the 1960s now use a tube design derived from Khan’s structural engineering principles.
There are three variations to Khan’s tube design which have been used to suit different structural requirements. The Framed Tube is the simplest and can be adapted to square, rectangular, circular and freeform shapes.
The Trussed Tube or Braced Tube design uses fewer and more widely spaced exterior columns which are tied together with external bracing, while the Bundled Tube consists of several buildings tied together to resist lateral forces.
The beauty of Khan’s tubular systems is that buildings can be constructed used steel or concrete, or a composite of the two to reach lofty heights. In fact, the Burj Khalifa – coincidentally designed by Skidmore Owings and Merill – uses a bundled tube design and a composite of steel and concrete to hit its record 828m height. Proportionally, the design uses half the amount of steel used in the construction of the Empire State Building thanks to the tubular system.
The following list has been drawn up using data gathered by the Council of Tall Buildings and Urban Habitat. We've not counted current construction projects, or proposed buildings, nor have we included freestanding masts or towers - they are incuded in a list of their own.
We've also used the Council's definition for steel towers, where the main construction vertical and lateral structural elements and floor systems are constructed from steel.
As the construction industry is an ever evolving one, the list will change as more projects are completed over time.
|Building||Height||Difference||Country||Overall world rank|
1. Willis Tower
2. Empire State Building
3. Aon Centre
4. The Centre
5. The John Hancock Centre
6. Minsheng Bank Building
7. China World Trade Centre III
8. The Chrysler Building