99% Invisible

Structural Integrity

Apr 15, 2014
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ANECDOTE

City Corp Center's Design

  • The City Corp Center, a 59-story skyscraper in New York, has a unique design.
  • It appears to levitate due to being propped up on stilts, not corners.
ANECDOTE

Building Over a Church

  • Architect Hugh Stubbins and structural engineer William LeMessurier designed the City Corp Center.
  • It was built over St. Peter's Lutheran Church, requiring stilts for support.
INSIGHT

Swaying Skyscraper

  • City Corp Center's chevron bracing and light weight make it sway in the wind.
  • A tuned mass damper on the roof helps stabilize these oscillations.
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