The Leaning
Tower of Pisa was built between 1173 and 1372.
It leans of
course, because the designers didn’t do an adequate job of foundation
investigations. Now, almost a thousand years later, we have advanced
substantially in the area of soil mechanics and this wouldn’t happen
today. Oops, not so fast, There's a 58-story skyscraper in San Francisco that is both sinking and leaning. It was
built on artificial filled ground dredged up from the bay, famous for
collapsing buildings in the 1989 earthquake.
Since the
building is a condominium, buyers are kind of stuck. I have been working under
the assumption that tall San Francisco skyscrapers were properly designed to be
earthquake safe, but it looks like this one will fall over in the next “big one” and
take some adjacent buildings with it.
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