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Dale of Green Gables's avatar

While not directly comparable, it's interesting how the Empire State Building survived the bomber crash pretty much intact while the Twin Towers did not survive the commercial plane crashes. According to reports, part of it had to do with construction: the ESB is a traditional steel frame encased in thick masonry and reinforced concrete for a very high level of structural redundancy, while the Towers utilized a lighter, innovative "framed-tube" design. This maximized open floor space by transferring the load to the perimeter columns and a central core, although making the structures far more vulnerable. Obviously, you don't normally design buildings to withstand plane crashes. But what caused the eventual collapse of the Towers was the enormous volume of jet fuel generating a conflagration with temperatures exceeding 1,500°F, weakening the floor trusses and steel columns until they could no longer support the weight above them. By comparison, the B-25 had a very much smaller fuel load and the resulting fires on one floor were contained quickly.

Vickie Berry's avatar

Thank you for writing about Betty Lou. Despite the terrible fall and subsequent injuries she went on (it appears) to live a fulfilling life showing us we can overcome tragedy. Let’s keep that in mind during the trying times of this regime. Oh, and her courage to return to the elevator and that beautiful smile! Brava Betty Lou!

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