Types of Bridge Structures
Girder Bridge: This is one of the most basic bridge types. An example could be a log across a stream. It is the oldest bridge type.
Truss Bridge: Truss bridges are simple structures usually consisting of triangles. Most beams in truss bridges are typically straight, so this is one of the ideal types of bridges to use for toothpick bridges.
Rigid Fram Bridges: The girders and the support piers are all one piece. This can be used to hold a lot of weight.
Arch Bridges: They are the 2nd oldest bridge type. They are seen very often. They are good for crossing valleys and river.
Cable Stayed Bridge: This bridge type has a continuos girder with one or more towers erected above piers in the middle of the span. The cables connect diagonally and supports the girder.
Suspension Bridge: This bridge type allows for the longest bridge span. They are different from Cable Stayed Bridges.