Willis Tower’s glazed floor cracks. How reasonable is the fear of breaking through?

Scary News: The glazed platform of Willis Tower (formerly Sears Tower) in Chicago, 103 stories up, on top of one of the tallest skyscrapers suddenly cracked under the feet of a family. The news went viral although only the thin protective layer of the glazed platform was affected, not the supporting panels. But are glazed floors more … Continue reading