S-2.1, r. 4 - Safety Code for the construction industry

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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.