Sky lobby

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The former World Trade Center's twin towers used sky lobbies, located on the 44th and 78th floors of each tower.

Sky lobbies are intermediate floors where people can change from an express elevator that only stops at the sky lobbies to a local elevator which stops at every floor within a segment of the building. When designing very tall (supertall) buildings supplying enough elevators is a problem. The sky lobby, first used in the John Hancock Center in Chicago^[1] , is one approach to the problem.

[edit] Buildings with sky lobbies

(in chronological order by construction date)

• John Hancock Center in Chicago
• 1 World Trade Center (Two sky lobbies at 44th and 78th floors) in New York City
• 2 World Trade Center (Two sky lobbies at 44th and 78th floors) in New York City
• Sears Tower (Two double level sky lobbies at 33rd/34th and 66th/67th floors) in Chicago
• Taipei 101 (Two double level sky lobbies at 35th/36th and 59th/60th floors) in Taipei, Taiwan, ROC

[edit] References

1. ^ Otis History: The World Trade Center. Otis Elevator Company. Retrieved on 2006-12-07.

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