Construction Failures: Tower of Pisa

The Tower of Pisa - The Architectural History

As a complement to the Cathedral and Baptistery was carried out by Benenato Pisano according to an inscription on 98th in 1173 the foundation stone of the side the Cathedral located Campanile. As with many cathedrals of Italy the Tower of Pisa (tower) is far from the abandoned church (http://new s.bbc.co.uk). The ring was at the foundation a width of 7.5 m with a Diameter of 19.6 m and thus only slightly larger than the running Diameter of the lower shaft part 15.5 m. This situation would prove disastrous for the Future of the yet to be compiled Structure prove. After construction there were several armed conflicts with Florence. The financial has been weakened so much that in 1184 the construction work after completion the second Gallery has been set (http://news.bbc.co.uk).

According to current information was the Tower of Pisa during construction slightly inclined to the north? To date has not yet been clarified, why after a first tilt north occurred. It is believed that under certain conditions unstable and only the vertical position an inclined position above the limit addition, quasi stable. This could be in the border area of the unstable state of a "staggering" of the Stump in a stable Tower of Pisa south (http://www.archidose.org).

Derive other considerations are assume that the change in the Tower of Pisa slope on a construction sequence was attributed.

In the intermediate schenzeit was a tendency of structure occurred to the south. The south sloping contact surface the stump was offset, was built on perpendicular. Ten years later, in 1284, after the construction of four other projectiles, were due to the increasing tilt of the Tower of Pisa south of the construction work again aborted. 1298 is the Deviation of 1.43 m. Lot After the increase in Tendency was reduced (1.63 m deviation by lot) it was decided in 1360 - almost 200 years after the start the foundation work - Tommaso Pisano by the Campanile with the coronation by the after Top open belfry complete to leave (http://www.archidose.org).

Six pairs of columns with narrow openings in their midst form the rotunda. The bells were between the pairs of columns and hung in the small openings. Even the bell floor was placed perpendicular to the base. Because of the now encountered Pitch it was necessary to compensate for the height difference as access from the ceiling on 7 Floor to the podium of the Belfry on the south side of 6 steps, run on the north side four stages. The Tower of Pisa now had its final Get shape (http://www.archidose.org). By the repeated compensation the tilt in the construction of another phase of construction was the Total Tower of Pisa a slightly banana Silhouette. Carlo Fontana (1634-1714) had in the 17 this Century State recorded in a drawing.

In the following century's one is always busy again with the growth of settlements and the inclination of the Tower of Pisa (1550 ...