The Council on Tall Buildings and Urban Habitat published a report on what it called "vanity height"
Full article: http://www.ctbuh.org/Publications/Jo...S/Default.aspx
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We noticed in Journal 2013 Issue Is case study on Kingdom Tower, Jeddah, that a fair amount of the top of the building seemed to be an unoccupied spire. This prompted us to investigate the increasing trend towards extreme spires and other extensions of tall buildings that do not enclose usable space, and create a new term to describe this Vanity Height, i.e., the distance between a skyscrapers highest occupiable floor and its architectural top, as determined by CTBUH Height Criteria.  With a vanity height of nearly 124 meters within its architectural height of 321 meters, the Burj Al Arab has the highest non-occupiable-to-occupiable height ratio among completed supertalls. 39% of its height is non-occupiable.  Without vanity height, 44 of the worlds 72 "supertall" buildings (defined as more than 300 meters) would be less than 300 meters, losing their supertall status. New York City has two of the top 10 tallest vanity heights in the world and the city will gain a third when the new One World Trade Center opens in 2014. The vainest building overall is Ukraina Hotel in Moscow, Russia, with 42 percent of the building uninhabitable. |
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