Support of Joists or Beams on Masonry Walls That Enclose Chimney Flues
(1) Joists or beams may be supported on masonry walls that enclose chimney flues provided the combustible members are separated from the flue by a minimum of 290 mm of solid masonry.
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Article 9.21.5.3 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.