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A pratt truss bridge design includes vertical components and diagonals that slope down towards the center. It was invented in 1844 by Thomas and Caleb Pratt. It was a common solution for railroad bridges when wood truss elements were replaced for metal. Here you can learn more about its history, its basic capabilities, and some of its most famous bridges that use it.
One of the seven modern wonders of the world – Channel tunnel between Britain and France has a much longer history than we could assume at first sight. It existed in the minds of dreamers for two centuries.
Modern cantilever bridge is one of the safest bridge variants because it can carry largest load. Since the dawn of the modern bridge, in 19th century, they were used to carry railroads.
Cable-stayed bridge is a variant of a suspended bridge that is more economic that other types of bridges on middle distances and for middle loads. It also allows for some rather interesting designs.