The Ontario Building Code | Dimensions of Landings
3.4.6.4. Dimensions of Landings
(1) Except as provided by Sentence (4), the length and width of a landing shall be at least the width of the stairway or ramp in which it occurs, except that in a straight run the length of the landing need not be more than 1 100 mm.
(2) Where a doorway ="http://thehandyforce.com/doors/" title ="Toronto Door installer">doorway or stairway empties onto a ramp through a side wall, there shall be a level area extending across the full width of the ramp, and for a distance of 300 mm on either side of the wall opening, except one side if it abuts on an end wall.
(3) Where a doorway ="http://thehandyforce.com/doors/" title ="Toronto Door installer">doorway or stairway empties onto a ramp through an end wall, there shall be a level area extending across the full width of the ramp and along its length for not less than 900 mm.
(4) Where the direction of exit travel changes at a landing, the landing is permitted to be chamfered or curved in plan, provided the required width of the stair is maintained where measured perpendicular to the direction of exit travel across the landing.
In Plain Language
Landings generally must be at least as wide as the stairway or ramp they serve, with the length of a straight-run landing capped at a minimum of 1,100 mm, and specific rules apply where a doorway opens onto a landing.
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.