One and Two Flue Chimney Construction

1234567891011121314151617181920
Across
  1. 4. tubular frames allowing masons to work at heights
  2. 6. a door to access flue for cleaning
  3. 7. depth in ground where ice no longer exists
  4. 9. how many appliances allowed per flue
  5. 10. placing flues at different heights
  6. 12. concrete top of chimney to shed water
  7. 13. 1 part cement 2 parts sand, 3 parts stone
  8. 15. seals the base of the chimney at roofline
  9. 16. allows water run off not to touch chimney
  10. 18. mortar, severe weather mortar below ground
  11. 20. flow of gasses
Down
  1. 1. spring loaded damper atop chimney
  2. 2. round pipe connecting heater to flue
  3. 3. default mortar for chimny, above ground
  4. 5. concrete support beneath chimney
  5. 8. metal hat sits atop the chimney flue
  6. 11. mortar used to lay flues
  7. 14. sliced in half view
  8. 17. shows object in frontal view
  9. 19. putting a course of brick between flues