every part of the arch is under compression. For this reason, arch bridges must be made of materials that are strong under compression. The Romans used stones. One of the most famous examples of ...

Did you know a double arch bridge is hidden in New York and it's in the Hudson Valley? Have you ever seen it? Most New ...

The new Portal Bridge design has three arch spans totaling 1,200 feet in length and are 50 feet above the river to allow marine vessels to pass under. The passage of the bridge section was ...