The Ontario Building Code | Openings in Loadbearing Flat Insulating Concrete Form Walls
9.20.17.4. openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings in Loadbearing Flat insulating Concrete Form walls
(1) No openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings shall occur within 1.2 m of interior and exterior corners of exterior loadbearing flat insulating concrete form walls.
(2) Inloadbearing flat insulating concrete form walls, lintels shall be provided over all openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings wider than 900 mm.
(3) Lintels described in Sentence (2) shall be constructed in accordance with Tables A-17, A-18 or A-19.
(4) Lintels described in Sentence (2) over openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings wider than 1.2 m shall be reinforced for shear with 10M stirrups at a maximum spacing of half the distance from the bottom reinforcing bar to the top of the lintel.
In Plain Language
Openings in loadbearing flat ICF walls have their own requirements set out in this article, since load-bearing walls need additional reinforcement around openings to maintain structural capacity.
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.