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4.130 tons is about one-fifty-five-thousandth as heavy as The Sears Tower.
In other words, it's 0.000018570 times the weight of The Sears Tower, and the weight of The Sears Tower is 53,850 times that amount.
(officially "Willis Tower" as of 2009) (Chicago, Illinois)
The Willis Tower weighs approximately 222,400 tons. 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.
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