Correction for the weight of The Sears Tower
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How heavy is 29,800,000 grains?
It's about one-one-hundred-thousandth as heavy as The Sears Tower
The weight of The Sears Tower is about 3,114,000,000,000 grains.
(officially "Willis Tower" as of 2009) (Chicago, Illinois)
The Willis Tower weighs approximately 3,114,000,000,000 grains. 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.