The Ontario Building Code | Masonry and Concrete
188.8.131.52. masonry and Concrete
(1) Except as otherwise stated in this Section, unit masonry shall conform to Section 9.20. and concrete to Section 9.3.
(2) masonry above openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings shall be supported by steel lintels conforming to Sentence 184.108.40.206.(2), reinforced concrete or a masonry arch.