1. Forces and Loads

2. Static Load Static Loads: are loads that are unchanging or change slow
Example: A person holding a stack of books but he is not moving. The force downwards is STATIC FORCE

3. Dynamic Load
Dynamic Load is a load that is always moving and changing on the given structure. Example: A person carrying a weight of books and walking. The force is moving or DYNAMIC FORCE.

4. Tension Tension is a pulling force
Example: The rope is in “tension” as the two people pull on it. This stretching puts the rope in tension.

5. Compression
Compression is a squeezing force Example: The weight lifter finds that his body is compressed by the weights he is holding above his head.

6. Shear
Shear: a multidirectional sliding and separating force.

7. Torsion
Torsion: A twisting force.

8. What forces are acting on this bridge?