It's the first American arch bridge to be constructed from segments of pre-cast concrete, a highly economical material. Two graceful arches support the roadway above. Usually arch bridges employ ...

two beams with an “imaginary” hinge; improper constraints; complex structures; example; a famous three-hinged structure. 6) Arches and suspension bridges. Indirect load. Three hinged arch; arch with ...

Centering under construction Constructing an arch bridge can be tricky, since the structure is completely unstable until the two spans meet in the middle. One technique is to build elaborate ...