Bridges Across 3. The structure that the ends of the cables are attached to on a suspension bridge. 5. Works with the engineer to design the bridge. 7. The pieces on the ends of an arch that keep it from collapsing outward. 8. A bridge supported by two long, curved cables. 11. A pulling force. 12. A structure that is supported by balancing. 15. Where the roadway is. 16. A pushing force. 18. The cable-stayed bridge in downtown Boston. 19. A structure used to cross rivers, canyons, and roads. Down 1. A long, thick, steel wire used on some types of bridges. 2. The piece of an arch that keeps it form collapsing inward. 4. A bridge supported by many straight cables. 6. A bridge made up of many triangles put together. 9. The length of a bridge. 10. A curved structure. 11. Large, tall structure that holds the cables up on suspension and cablestayed bridges. 13. The person who designs the structure of a bridge. 14. A vertical support. 17. A horizontal support.