Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Blown away: Citicorp Center Tower repairs revisited



Dat Duthinh


Using Database-Assisted Design and the Tokyo Polytechnic University Aerodynamic Database, we show that face winds put more structural demand than corner winds do on the Citicorp Tower in Manhattan. This 59-story building, supported by four midside columns, famously had to undergo secret emergency strengthening shortly after its completion in the 1970s to withstand corner winds.
Engineers Journal


across-wind excitation, along-wind excitation, aerodynamic database, Citicorp Tower, corner wind, Database-Assisted Design, engineering ethics, face wind, overturning moment, vortex-shedding.


Duthinh, D. (2019), Blown away: Citicorp Center Tower repairs revisited, Engineers Journal (Accessed July 12, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created June 30, 2019, Updated August 17, 2020