f. No operator work station should be located more than 25 feet from
the nearest exit.
Exits in explosives operating buildings must open outward. They should
not be fastened with locks other than antipanic catches or other quick
releasing devices during operating hours.
a. Exit doors should not be obstructed. Exits should be casement doors
and be glazed with non-shattering plastic materials.
b. In no case shall the door be less than 30 inches wide by 80 inches
c. All interior doors should open in the direction of flow of material,
and into unobstructed passageways.
d. Explosives buildings' exit doors which are more than 4 feet above
the ground should open on platforms that have safety chutes, ramps, or
stairways with handrails.
Inspect the facility for the installation of appropriate operational
shields. An operational shield is a barrier to protect personnel, material,
or equipment from the effects of a possible fire or explosion at a
The following information can be used to determine
the suitability of operational shields.
a. A 12 inch reinforced concrete wall gives adequate protection for
disassembly operations when an item contains 15 pounds or less of
explosives, and when the nearest part of the item is at least 3 feet from
the wall and 2 feet from the floor.
b. A reinforced concrete wall 30 inches thick is satisfactory for
protection against an item containing no more that 50 pounds of explosives
if the nearest part of the item is at least 3 feet from the wall and 2 feet
from the floor.
c. Under the same separation distance, reinforced concrete walls 36
inches thick are suitable for explosives not exceeding 70 pounds.
d. At the operating site when protection is required against ammunition
containing more than 70 pounds of explosives, a personnel protective
shelter, must be placed at intraline distance for the quantity of explosive.
e. Frontal and overhead protection must be provided to