Minimum Wall Thickness Chases and Recesses
(1) Except as provided in Sentence (2) and Article 9.20.7.4., no chase or recess shall be constructed in any wall 190 mm or less in thickness.
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(2) Recesses may be constructed in 190 mm walls provided they do not exceed 100 mm in depth, 750 mm in height and 500 mm in width.
Article 9.20.7.2 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.
