The observatory is a member of the World Federation of Great Towers. ![]() The observation deck elevators in the John Hancock Center, were manufactured by Otis, and travel 96 floors at a top speed of 1,800 ft/min (20.5 mph). Including its two antennas, the John Hancock Center has a height of 1,500 feet (457.2 m), making it the fourth highest building in Chicago and the thirty-third tallest building in the world when measured to pinnacle height.
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