Across
- 1. a stone that sits at the top of an arch
- 4. a pulling force
- 5. a structure built to support the pressure of an arch
- 7. a squeezing force
- 9. a structure built on something else
- 10. a structure made of triangles used to support other structures
- 11. a structure that looks like a semicircle
Down
- 2. a structure suspended from something
- 3. an engineer that maintains roads, bridges, dams, and similar structures
- 6. a structure that supports something
- 8. the width of an arch