S-2.1, r. 4 - Safety Code for the construction industry
3.9.11. Means of access: Scaffoldings more than 1.5 m from the ground, or from any other fixed support, shall have means of access, safe and clear of any obstruction, with:
(a) landings at every 6 m; and
(b) a stair for scaffoldings 18 m in height or over.
R.R.Q., 1981, c. S-2.1, r. 6, s. 3.9.11.