Across
- 2. built to support an arch
- 4. distance between two supports of a structure
- 5. used for towers which bear heavy loads
- 8. a structure built on top of something else
- 10. designs and maintains structures
- 11. a central stone which locks the whole arch together
Down
- 1. main elements that support the load
- 3. a supporting structure
- 6. when the top of the structure is squeezed together
- 7. framework made up of triangles
- 9. when the bottom edge of the structure is streching