The Leaning Of The Tower of Pisa
Today, the Leaning Tower of Pisa is one of the most popular tourist attractions in world, but the tower wasn’t actually supposed to lean. First completed in 1372, the tower was already problematic even during its construction in the 12th century. Because of the soft ground, it tilted to over 5 degrees over time. In the early ‘90s, work was carried out in order to rectify it. The tilt has been gradually changed to a little under 4 degrees. It might have been a mistake that cost $4 million, but at least the UNESCO World Heritage Site looks pretty.
The Leaning Of The Tower of Pisa
The Quebec Bridge Collapses Twice
The Quebec Bridge collapsed back in 1907 – 75 workers were killed and 11 were injured. The cantilever arm of the bridge, half-completed span, and south anchor arm fell into the St. Lawrence River and took the workers with it. An engineer named Theodore Cooper was responsible for the bridge’s collapse in 1907 since its cause, the Chord A9R failure, rested on his shoulders. In 1916, Frants Lichtenberg was informed about a problem with the bridge’s central span six times. However, he ignored the issue. On September 11th, 1916, the bridge collapsed again, killing thirteen workers.
The Quebec Bridge Collapses Twice
