Across
- 6. structure A structure with a wire or string that helps support it
- 7. A stone located at the center top of an arch, locking it together
- 9. A supporting structure
- 11. A force that is being squeezed together
Down
- 1. engineer An engineer who designs and roads, bridges, and dams
- 2. The extent of a bridge or arch
- 3. A structure built to support the lateral pressure of an arch or span
- 4. A structure built on top of something else
- 5. A force that is being pulled apart
- 8. A curved symmetrical structure
- 10. A framework made of triangles