National Boards > Bridges

Difference between a bridge and a culvert

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roadman65:
https://www.facebook.com/HighwayEngineeringDiscoveries
Interesting article about the official definition of either structure.

Rothman:
Link didn't take me directly to the discussion, but in NY it'a a simple matter of length: 20 feet or shorter is a culvert.

Big John:
The AASHTO standard is 20 feet, and no distinction for short or long bridges.  Meaning there are culvert length bridges and bridge length culverts.  Structures less than 20 feet long are exempt from inspection requirements.

Rothman:

--- Quote from: Big John on May 29, 2023, 09:13:38 AM ---The AASHTO standard is 20 feet, and no distinction for short or long bridges.  Meaning there are culvert length bridges and bridge length culverts.  Structures less than 20 feet long are exempt from inspection requirements.

--- End quote ---
Not in NY.  At least in NYSDOT's inventory, there are no "culvert length bridges" or bridges less than 20 feet...eh, have to be careful.  Might be some stupidity downstate here and there...

vdeane:
Interesting.  I had long thought of culverts as being more akin to tunnels (from the perspective of whatever is being crossed), not as a pure function of length.

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