It was likely designed by engineer Bonanno Pisano who started construction in 1173. Part of any analysis, must also speak to why this tower survived so long when others failed.įirst some basics. The tower of Pisa is an 8 story bell tower for the cathedral next door. The original-tilted tower is something of an engineering marvel, a highly tilted, stone on stone building that has outlasted earthquakes and weathering that toppled many younger buildings that were built straight vertical, most recently the 1989 collapse of the tower of Pavia. What follows is my effort to learn from the failures and successes, and to speculate on the future. Neither is it 100% clear that current solution didn’t make things worse. But you may not know how that there were at least eight other engineering attempts, and most of these did nothing or made things worse. You may know that engineers recently succeed in decreasing the tilt of the “leaning” tower of Pizza by about 1.5°, changing it from about 5.5° to about to precisely 3.98° today –high precision given that the angle varies with the season.
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