Across
- 2. curved structure
- 6. supporting structure.
- 7. supporting a roof, bridge, or other structure.
- 8. extend from side to side of.
- 9. engineer engineering is a professional engineering deals with the design, construction, and maintenance
- 10. wedge-shaped stone piece
- 11. being stretched tight.
Down
- 1. a structure built on top of something else.
- 3. "pushing
- 4. structure main elements that support the load
- 5. at the ends of a bridge