Culvert is a structure constructed over running water or physical obstruction. The main purpose of constructing culvert structure is to provide passage over the obstruction. 

Slab culvert, a type of culvert, could be three-sided or simply a deck slab. It is embedded in the soil on both sides. The slab provides a bridge over the distance. Slab culverts can replace box culverts if no artificial flooring is necessary.


Slab culverts do not have bottom slabs, therefore, the natural flow of water is maintained and natural bottom substrate remains intact. The safety of high-velocity vehicles is not affected by slab culvert as it doesn't have any sharp corner. 

While constructing the slab culvert, a series of slabs are laid to form the bridge-like structure. After that, a pavement surface is placed on top to serve the purpose as the road.

The standard span length ranges from 8’ to 48'. ASTM C 1504 design code is followed to design the slab culvert.



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