Cornices, Sills and Trim
(1) Cornices, sills or other trim of masonry material that project beyond the wall face shall have not less than 65% of their mass, but not less than 90 mm, within the wall or shall be adequately anchored to the wall with corrosion-resistant anchors.
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Article 9.20.11.5 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.