S-2.1, r. 4 - Safety Code for the construction industry
3.8.5. When wire mesh is required on a guardrail, it shall:
(a) be of gauge No. 16 or larger;
(b) have mesh of 40 mm or less;
(c) fill all the area between the toe-board and the top-rail; and
(d) be installed on the inside of the intermediate rail.
R.R.Q., 1981, c. S-2.1, r. 6, s. 3.8.5.