S-2.1, r. 13 - Regulation respecting occupational health and safety

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60. Silos: Silos used for storing dry combustible substances shall be:
(1)  made of fire resistant materials;
(2)  provided with covers and adequate ventilation;
(3)  provided with explosion vents complying with NFPA Standard 68-1998 Guide for Venting of Deflagrations, where there is a risk of explosion. Vents already installed in silos on 2 August 2001 may also be used if they comply with a previous text of that standard and are in good working order.
O.C. 885-2001, s. 60.