Asked by mariah

what is the actual base of the sears tower

Answers

Answered by Ms. Sue
http://chicago.travelape.com/attractions/sears-tower/


Answered by drwls
Nine bundled square tubes in a 3 x 3 pattern, each with 75 x ft feet base but different heights, located at
233 S. Wacker Drive.

It is now called Willis Tower after the new owner.

The bundled tube design was considered revolutionary at the time, but is also being use at the newly opened Burj Khalifa tower in Dubai, which is twice as high.
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