Correction for the weight of The Sears Tower
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How heavy is 603,000 firkins?
It's about one-tenth as heavy as The Sears Tower
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The weight of The Sears Tower is about 4,943,000 firkins.
(officially "Willis Tower" as of 2009) (Chicago, Illinois)
The Willis Tower weighs approximately 4,943,000 firkins. The outer wall surface of the Tower is covered with black anodized aluminum panels which would total 110,000 sq. m (28 acres) if laid out together.