The Ontario Building Code | Ramp Slope
126.96.36.199. Ramp Slope
(1) Except as required for aisles by Article 188.8.131.52., the maximum slope of a ramp shall be,
(a) 1 in 10 in any assembly, care,care and treatment, detention or residential occupancy,
(c) 1 in 8 in any other floor area, and
(d) 1 in 10 for an exterior ramp.