tech education

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Across
  1. 1. two force member
  2. 4. supporting structure
  3. 6. a central stone at the summit of an arch
  4. 8. extend from side to side
  5. 9. a structure built to support pressure
  6. 10. a structure built on top of something else
  7. 11. engineering that deals with design and construction
Down
  1. 2. structures from suspension wires
  2. 3. curved structure
  3. 5. being stretched tightly
  4. 7. force pushing down