Engineering Towers Crossword

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Across
  1. 5. I hold most of a building's load and I'm only subject to extension forces
  2. 6. I build your roads, buildings, bridges, and more
  3. 7. the ends of a bridge
  4. 8. I pull your building apart
  5. 9. I ____ this much area
Down
  1. 1. I am built on another structure
  2. 2. I am the subsection of a structure
  3. 3. I hold your arch together
  4. 4. I support a structure and am usually made of triangles
  5. 6. I will squeeze your building
  6. 7. I go over your head, a curved structure holding up the wall for you