S-2.1, r. 4 - Safety Code for the construction industry
3.7.2. Ramp: (1) Any ramp shall:
(a) have a slope not exceeding 300 mm of vertical rise to each 900 mm of horizontal run; and
(b) have cross cleats if the slope exceeds 300 mm of vertical rise to each 2.4 m of horizontal run. These cleats shall:
i. be spaced at regular intervals not exceeding 450 mm; and
ii. measure at least 25 mm × 50 mm, nominal measurements.
(2) The requirements of subsection 1 do not apply to a ramp which is installed in the stairwell of a building 2 storeys or less, inasmuch as the ramp:
(a) has a slope not exceeding 45º; and
(b) has cleats measuring 50 mm × 50 mm, nominal measurements, spaced at regular intervals not exceeding 300 mm.
R.R.Q., 1981, c. S-2.1, r. 6, s. 3.7.2.