Recently, I went to a covered bridge in Union County, Ohio with my camera and spent a little while admiring a 142 year old wooden covered bridge. Often I hear people asking, “Why did they make bridges covered?” I have heard many good answers. But, the reason for covered bridges was an answer to an engineering problem.
Before bridges were made of iron, steel, and concrete, they were made of wood. They created wooden truss from which the bridge was built. The problem was that a wooden bridge exposed to snow, rain, and sun, would only last ten to fifteen years. By building the bridge with sides and a roof they could extend the life of the bridge. Like I said, this one is 142 years old.
So, without further ado, here is the Culbertson Covered Bridge.