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Vanity height is defined by the Council on Tall Buildings and Urban Habitat as the height difference between a skyscraper's pinnacle and the highest usable floor (usually observatory, office, restaurant, retail or hotel/residential).〔(【引用サイトリンク】title=Vanity height )〕 Because the CTBUH ranks the world's tallest buildings by height to pinnacle, a number of buildings appear higher in the rankings than they otherwise would due to extremely long spires. The current world's tallest building, Burj Khalifa, is officially 828 meters tall, but its highest usable floor is 585m above ground. Therefore, its vanity height is defined as 244 meters, or 29% of the building's total height.〔 The likely next tallest building, Jeddah Tower (designed by the same architect), will be over 1,000 meters tall but its highest floor is 630m above ground. The top 370m (equivalent to an 85-story building) or 37% of the building's total height is unusable. When vanity height is excluded, the height progression of the world's tallest buildings looks much more modest in comparison. ==Other== The CTBUH requires a structure's vanity height to be under 50% to be defined as a "building." Otherwise, it is considered a communications tower and ineligible for the rankings. 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「Vanity height」の詳細全文を読む スポンサード リンク
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