Engineering Towers

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Across
  1. 3. the distance between two structures
  2. 5. a structure built on top of something else
  3. 8. a structure made to support another structure
  4. 9. a structure made of triangles
  5. 10. being stretched tight
Down
  1. 1. usually used in bridges and roofs
  2. 2. someone who deals with design and construction
  3. 4. a curved structure
  4. 6. structures at the ends of bridges
  5. 7. at the middle of an arch usually made to support weight