A bridge is a spanning structure that creates a passage over an obstacle such as a river, gorge, valley, road, railway and so on.
Bridges are a common feature of the built environment and one of the key elements of civil engineering. The basic principles of bridge design are dependent on the nature of the spanning structure; its shape, materials, means of support, distance spanned, terrain, function, budget, exposure and so on.
The three basic types of bridge structure are:
- Arch bridges.
- Suspension bridges.
- Beam Bridges
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