18. There shall be at least two independent exits for each division, compartment or gallery of the public buildings. Besides the exits hereinabove mentioned, there shall, whenever practicable, be direct exits opening out from the principal floor to a street, public square, lane or yard, and such exits shall be provided with doors or light windows, opening outward, and kept closed so as to allow of their being promptly and easily opened in case of fire or panic.
R. S. 1964, c. 149, s. 18; 1981, c. 23, s. 52.