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This list of tallest buildings in the world ranks skyscrapers by height. Only buildings with continuously occupiable floors are included, thus non-building structures, including towers, are not included (see List of tallest buildings and structures in the world). == Ranking criteria and alternatives == The international non-profit organization Council on Tall Buildings and Urban Habitat (CTBUH) was formed in 1969 and announces the title of "The World's Tallest Building" and sets the standards by which buildings are measured. It maintains a list of the 100 tallest completed buildings in the world.〔(【引用サイトリンク】title=100 tallest completed buildings in the world )〕 The organization currently ranks Burj Khalifa in Dubai as the tallest at .〔 The CTBUH only recognizes buildings that are complete, however, and some buildings listed within these list articles are not considered complete by the CTBUH. In 1996, as a response to the dispute as to whether the Petronas Towers or the Sears Tower was taller, the council listed and ranked buildings in four categories: * height to structural or architectural top; * height to floor of highest occupied floor; * height to top of roof (removed as category in November 2009); and * height to top of any part of the building. Spires are considered integral parts of the architectural design of buildings, to which changes would substantially change the appearance and design of the building, whereas antennas may be added or removed without such consequences. This naturally hurts the rankings of buildings without spires, or with antennas instead of spires, or with shorter spires. The most famous such discrepancy is that the Petronas Towers, with their spires, are ranked higher than the Willis Tower (formerly called the Sears Tower) with its antennas, despite the Petronas Towers' lower roofs and lower highest points (of spire/antenna). However, this type of discrepancy has happened before, without resulting in a change of the criteria used to determine the world's tallest building, which until 1996 was the height to the top of the tallest architectural element (spires, but not antennae). A famous historical case of this discrepancy was the rivalry between The Trump Building (then known as the Bank of Manhattan Building) and the Chrysler Building. The Bank of Manhattan Building employed only a short spire and was 927 ft (283 m) tall and had a much higher top occupied floor (the second category in the 1996 criteria for tallest building). In contrast, the Chrysler Building employed a very large 125 ft (38 m) spire secretly assembled inside the building to claim the title of world's tallest building with a total height of 1,048 ft (319 m), despite having a lower top occupied floor and a shorter height when both buildings' spires are not counted in their heights. Upset by Chrysler's victory, Shreve & Lamb, the consulting architects of the Bank of Manhattan Building, wrote a newspaper article claiming that their building was actually the tallest, since it contained the world's highest usable floor. They pointed out that the observation deck in the Bank of Manhattan Building was nearly 100 ft (30 m) above the top floor in the Chrysler Building, whose surpassing spire was strictly ornamental and essentially inaccessible.〔Binders, George (August 2006). ''101 of the World's Tallest Buildings''. p. 102.〕 At present the issue of identifying the tallest building is not contested, as Burj Khalifa tops the list by some margin, regardless of which criterion is applied. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「List of tallest buildings in the world」の詳細全文を読む スポンサード リンク
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