S-2.1, r. 9 - Regulation respecting concrete pumps and distribution masts

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14. A guard-rail shall
(1)  be comprised of an upper rail and a mid-rail placed at mid-height and solidly fixed to the inside of the posts;
(2)  be made of metal;
(3)  withstand a concentrated horizontal force of 900 N applied to any point of the upper rail; and
(4)  withstand a concentrated vertical force of 450 N applied to any point of the upper rail.
O.C. 1520-92, s. 14.