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.
Entrance to the Culbertson Covered Bridge.
Interior of the Culbertson Covered Bridge.
Interior of the Culbertson Covered Bridge.
Interior of the Culbertson Covered Bridge.
Interior of the Culbertson Covered Bridge.
Interior of the Culbertson Covered Bridge.
Interior of the Culbertson Covered Bridge looking at another bridge beside the Culbertson Bridge. The wooden bridge cannot handle the weight of some of the modern vehicles using this road, the a smaller bridge was built to handle the heavier traffic.
Exterior of the Culbertson Covered Bridge.
Exterior of the Culbertson Covered Bridge.
Exterior of the Culbertson Covered Bridge.
Historical marker for the Culbertson Covered Bridge.
Historical marker for the Culbertson Covered Bridge.
joeccombs2nd 
I did not know that, but it makes sense and I will remember and try hard to share it.
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