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This is a list of tallest structures in the world, past and present of any type. Most of the tallest structures are Television broadcasting masts, followed by a mix of the taller tower-type structures (like the CN Tower ) and the taller High Rise buildings (like the Sears Tower ). Scattered among these are other structures including Oil Platform s, Electrical towers, bridge towers, etc. List is organized by absolute height since it includes many different classes of structures. This list includes quite a few masts. A Mast is a man-made support structure, commonly used on Sailing Ships as support for Sails , or on land as Radio Masts And Towers used to support Telecommunication equipment such as Radio Antennas ("aerials" in the UK ). TERMINOLOGY There is often ambiguity between the terms ''tower'' And ''mast'' . A tower is a self-supporting or Cantilevered structure, while a mast is held up by stays or Guys .''See'' List Of Towers Both towers and masts have limited floor space and are Non-building Structure s, as opposed to regular Buildings which have greater floor space for occupancy. The terminology is further confused through misuse. Skyscrapers are often referred to as ''towers''''See'' List Of Tallest Buildings In The World and some towers use the term ''mast''. Ironically, ''skyscraper'' has some Etymology from references to high sailboat masts. LIST BY HEIGHT Notes
Top 30 of all time Other structures (past or present) taller than 550 m (1,804 ft) Other structures (past or present) between 500 and 550 m (1,640 and 1,804 ft) Other structures (past or present) between 450 and 500 m (1,476 and 1,640 ft) Other structures (past or present) between 400 and 450 m (1,312 and 1,476 ft) Other structures (past or present) between 350 and 400 m (1,148 and 1,312 ft) Notable structures between 300 and 350 m (984 and 1,148 ft) For practical purposes to keep the list to a reasonable length this part of list contains only notable structures. Structures taller than 350 m (1,148 ft) under construction This is an ''incomplete'' list of structures taller than 1,148 feet (350 m) under construction. Please correct (by adding further one or by putting completed structures in the upper table, if current height is over 1,148 feet (350 m)). Proposed radio masts taller than 600 metres LIST BY CONTINENT Current The following table is a list of the current tallest structures by each continent (listed by geographic size): All time The following table is a list of the all time tallest structures by each continent (listed by geographic size): REFERENCES SEE ALSO
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