Across
- 2. First to use arch bridges
- 7. One of the main types of bridges
- 8. Support in an arch bridge
- 11. Bridge that has a main cable
- 12. First to use rope bridges
- 14. Strongest shape
- 15. Sliding on past
Down
- 1. Passage over obstacle
- 3. Has a keystone
- 4. Squeeze
- 5. Mrs. Wink's favorite
- 6. Weight of structure itself
- 9. Bridge that uses triangles
- 10. Pull apart
- 13. Changing weight on the structure