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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.
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.
Bridge to nowhere is a type of bridge where one or both ends are incomplete or broken and its path does not lead in any meaningful direction. Read more about bridges to nowhere purposes and varieties.
Suspension bridges are relatively modern invention (at least those that are built to be large). They are cheaper and can have longer spans but can’t sustain as much weight as other types of bridges. Here are some variants of suspension bridges.