Engineering Towers

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Across
  1. 1. - a structure build in a curve-like shape
  2. 3. - the pull of 2 or more objects
  3. 4. - an underlying or supporting structure
  4. 7. structure - may be either plane or spatial
  5. 8. - a structure built as a vertical extension of something else
Down
  1. 1. - The structure built to support the end of bridges
  2. 2. - an engineer who designs and maintains roads, bridges, dams, and similar structures.
  3. 5. - the action of compressing or being compressed.
  4. 6. - a central stone at the summit of an arch, locking the whole together
  5. 7. - the full extent of something from end to end; the amount of space that something covers
  6. 9. - a structure made up of mainly triangles