The Leaning Tower of Pisa
The Leaning Tower of Pisa
The Leaning Tower of Pisa
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Alternatives to Restoration• In 1993, 600 Mg <strong>of</strong> leadweights were added tonorth side <strong>of</strong> <strong>Tower</strong>,attached by a removableconcrete ring placedaround base <strong>of</strong> <strong>Tower</strong>– Reduced leaning by nearlyone minute <strong>of</strong> an arc– Reduced moment thatpulled on <strong>Tower</strong> by 10%• Load was increased in1995 to 900 Mg whileengineers attempted toreplace lead weights withground anchorshttp://www.pubs.asce.org/ceonline/ceonline02/0302feat.htmlhttp://www.endex.com/gf/buildings/ltpisa/ltpgallery/freepix/pisaa6y.jpg?x=41&y=49
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