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.

A sky lobby is an intermediate floor where people can change from an express elevator that only stops at the sky lobby 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
• Columbia Center (Sky lobby at 40th floor) in Seattle, Washington, USA
• 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 December 7, 2006.

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