S.L. 33.1 Art. 7Directions to be observed.

The following directions shall be observed in the construction and maintenance of buildings which may be used for the manipulation and manufacture of explosives:

(a) the buildings should be low and narrow and based on sound rock foundations and sufficiently strong to withstand air pressure which may be generated by explosions in adjacent buildings;

(b) windows shall be made to fit tightly and open outwards, and are to be protected on the inside by a wire grille;

(c) door and window fastenings, hinges, bolts, locks and keys shall be made of copper or copper alloy;

(d) ventilators shall be well baffled to prevent the ingress of sparks;

(e) windows, ventilators, doors and passages shall be so arranged as to leave a current of air through the whole building when being ventilated;

(f) all inside corners in store-rooms must be rounded so as to facilitate cleaning. Floors and walls shall be kept free from cracks and crevices up to a height of one point two metres;

(g) no packages containing more than 200 lbs. of explosive material shall be stored in any building;

(h) all windows shall be of frosted wired glass;

(i) paint containing lead pigments, ground quartz or silica shall not be used;

(j) doors, windows and other wooden fittings shall be covered with sheet asbestos, sheet copper or other fire resisting material.