1. Bridges

2. Types of Bridges
Girder or Beam
Truss
Arch
Suspension
Cable-Stayed

3. Girder or Beam Bridges Simplest type of bridge
Consist of a beam supported on both sides by piers
Shortest span

4. Truss Bridge Sometimes considered a type of beam bridge
Span greater distances
Consist of many beams placed in stable triangular shapes
Distribute load more evenly over greater distances

5. Arch Bridge Curved shape Old design Stable but with a limited span
Load is distributed evenly over both sides

6. Suspension Bridge & Cable-Stayed Bridge
Have longest spans
Use cables to suspend load
Rope bridge to Golden Gate bridge
Cable-Stayed Bridge
Use cables in load distribution.
Cables run diagonally from the towers to the girder.