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.