Taipei 101
features a 508-meter, 101-story tower with a unique profile, a
five-story deep basement and a surrounding six-story retail structure.
Thanks to tapering walls, most floor plan areas vary between 2000 and
2500 square meters (21,500 to 27,000 square feet), though they are as
small as 47 square meters above the main roof. Building aspect ratio
(height/width) to the main roof is about 9 based on its ‘waist’ (and
6.8 counting the wider base). The Taipei tower is equipped with the
fastest elevators in the world, taking only 39 seconds to reach the
observatory situated on the 89th floor: “Window of Future.”http://www.thorntontomasetti.com/projects/taipei_101