The Ontario Building Code | Non-Conforming Chases or Recesses
9.20.7.4. Non-Conforming Chases or Recesses
(1) Chases or recesses that do not conform to the limits specified in Articles 9.20.7.1. to 9.20.7.3. shall be considered as openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings, and any masonry supported above such a chase or recess shall be supported by a lintel or arch as provided in Article 9.20.5.2.
In Plain Language
Chases or recesses that don't conform to the standard dimensional limits may still be permitted under the specific conditions set out in this article.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.