The Ontario Building Code | General Requirements
220.127.116.11. General Requirements
(a) except as permitted by Sentence (2), be constructed as a continuous element, and
(b) as required in this Part, have a fire-resistance rating as specified.
(2) openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings in a fire separation shall be protected with closures, shafts or other means in conformance with Articles 18.104.22.168. to 22.214.171.124. and Subsections 3.1.9. and 3.2.8.