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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.
A howe truss bridge design includes vertical members and diagonals that slope up towards the center. Its diagonals are under compression under balanced loading. It was invented in 1840 by Massachusetts millwright William Howe. Howe truss design proved to be instrumental not only in the development of several notable bridges at the end of an era of fully wooden bridges but also as an inspiration for the creation of other popular designs.
Arch Bridge is one of the most popular types of bridges, which can today be found all across the world. Here you can follow their path through history, from their first inception some 3000 years ago in Greece, to their renaissance in Ancient Rome, all up to modern times.