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Additional elevators connect the 80th floor to the six floors above it, as the six extra floors were built after the original 80 stories were approved. [31] [102] The elevators were mechanically operated until 2011, when they were replaced with automatic elevators during the $550 million renovation of the building. [103]
Many tall buildings use elevators in a non-standard configuration to reduce their footprint. Buildings such as the former World Trade Center's Twin Towers and Chicago's John Hancock Center use sky lobbies, where express elevators take passengers to upper floors which serve as the base for local elevators. This allows architects and engineers to ...
The elevators in a skyscraper are not simply a necessary utility, like running water and electricity, but are in fact closely related to the design of the whole structure: a taller building requires more elevators to service the additional floors, but the elevator shafts consume valuable floor space.
Several workers attested to the defective elevators with their own alarming stories of plummeting many floors through the 1968 building. ... stopped before dropping eight floors “like a free ...
The office floors begin at floor 20 [141] and go up to floor 90. [141] [142] There is a sky lobby on floor 64; designed by Gensler, the sky lobby covers 25,000 square feet (2,300 m 2). [143] The space has seating areas, a game room, a meeting room with capacity for 180 people, a cafe, and yoga and fitness classes.
Located on the 44th and 78th floors of each tower, the sky lobbies enabled the elevators to be used efficiently, while also increasing the amount of usable space on each floor from 62 to 75 percent by reducing the number of required elevator shafts. [79]
Once the elevator has left the floor, depending on where the alarm was set off, the elevator will go to the fire-recall floor. However, if the alarm was activated on the fire-recall floor, the elevator will have an alternate floor to recall to. When the elevator is recalled, it proceeds to the recall floor and stops with its doors open.
This problem would surface at First Canadian Place as well, during an intense storm on the evening of 15 May 2007, a 1 by 1.2 m (3 ft 3 in by 3 ft 11 in), 140 kg (310 lb) white marble panel fell from the 60th storey of the tower's southern face onto the 3rd-floor mezzanine roof below, causing authorities to close surrounding streets as a ...