All about bridges

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Across
  1. 1. The part of the bridge that traffic travels on.
  2. 4. Bridge created by a horizontal beam supported at each end by piers.
  3. 5. Trusses are made from this shape.
  4. 6. A bridge made of a solid deck and connected triangles.
  5. 9. In order for the bridge to stay stable, the forces must be ___________.
  6. 12. The primary function of a bridge is to carry ____.
  7. 13. The Golden Gate Bridge is an example of this type of bridge.
Down
  1. 2. The force that acts to shorten the thing it is acting on.
  2. 3. The profession that deals with the design, construction, and maintenance of roads, bridges, dams, airports, sewage systems, and railways.
  3. 6. A suspension bridge has _____ towers.
  4. 7. The Forth Bridge in Scotland is this type of bridge.
  5. 8. The pulling force is called ___________.
  6. 10. The bridge that only uses compression forces to stabilize it.
  7. 11. A push or a pull.