What Is Bridge?
The drainage structure which facilitates a communication route for carrying road or railway traffic across an obstruction or depression with or without water is called a bridge.
The route of communication may be a railway, roadway, cycle track, footpath, or a combination of both of them, and the obstruction may be in the form of a river, stream, valley, channel, road, railway track, etc.
The bridge has a total span length greater than 6m & less than 60m is known as minor bridge.
The bridge has a total span length greater than 6om and is called a major bridge.
Long Span Bridge:
Long span bridge has a main span length of more than 120m.
What Is Culvert?
A small bridge having a total length of 6 m or less between the faces of abutments is known as a culvert.
Drainage structures like culverts are used on highways, streets, and railways to transfer unwanted water from the road. Culverts are permanent drainage structures which are mainly constructed over small streams or canals.
During the road construction, culverts and bridges were built to transfer the water to flow underneath the road to protect the road and the cities.
Difference Between Bridge And Culvert:
1. Bridge is constructed to allow the easy passage of traffic or community, whereas a culvert is made for the passage of water.
2. The length of a bridge is always more than 6 m, but the length of a culvert is 6 m or less than 6 m.
3. bridge is constructed over an obstruction, depression or freeway, roadway, railway, etc. Culvert is made over small streams or canals.
4. Culvert is usually rectangular or circular in cross-section, having a roof, walls, and a floor. The bridge sits on the foundation of each bank (or wing walls) and it does not have the floor.