Create a model of a fixed bridge.

Creation should include

• abutments and superstructure
• calculations for weight
• consideration of compression, tension, and shear. 

Process/Skill Questions:

• What are compression, tension, and shear forces? How do these forces affect bridge construction?
• How do different bridge designs transfer loads to support the traffic above?
• What factors determine bridge design? Which design is best for a particular situation?