Semya and Taylor

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Across
  1. 4. an underlying or supporting structure
  2. 6. the action of compressing or being compressed
  3. 7. structure The simplest form of plane structure
  4. 8. engineer an engineer who designs and maintains roads
  5. 9. a central stone at the summit of an arch
  6. 11. the full extent of something from end to end
Down
  1. 1. a structure built to support the lateral pressure of an arch or span
  2. 2. a structure built on top of something else
  3. 3. combining form
  4. 5. the state of being stretched tight
  5. 10. a framework, typically consisting of rafters