SCIENCE TEST

Beam Bridge

• cars,trains,pedestrians

• Can stretch long spans

• can cross valleys, rivers,highways and long distances

Beam bridge with trusses: superstructure

• allows for things to pass underneath

• long spans over water or valleys or road

King Post Truss

• simple truss bridge used for short spans

  • common foot bridge

• over small spans

  • streams and creeks

  • pedestrians

Arch below deck

• shorter spans over water

  • compression only

• mainly decorative

• not common anymore

• expensive

Arch above deck

• over water in major cities

• allows big openings for cargo ships

• when columns can’t be used

Modern Suspension bridge

• cars and trucks

• over water in major cities

• allows big openings for ships

• larger spans

• multiple miles wide

cable stayed bridge

• heavy loads

  • cars, trucks, trains

• allows boats to pass underneath

• used with beam bridge

• over water/valleys