The Ontario Building Code | Ramp Slope
3.4.6.7. Ramp Slope
(1) Except as required for aisles by Article 3.3.2.4., the maximum slope of a ramp shall be,
(a) 1 in 10 in any assembly, care,care and treatment, detention or residential occupancy,
(b) 1 in 6 in rooms or floor areas classified as mercantile occupancy or industrial occupancy,
(c) 1 in 8 in any other floor area, and
(d) 1 in 10 for an exterior ramp.
In Plain Language
Ramp slope is capped depending on occupancy type, generally 1-in-10 for assembly, care, and residential occupancies, 1-in-6 for mercantile and industrial floor areas, 1-in-8 elsewhere, and 1-in-10 for exterior ramps.
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.