Section R11-1-235. Construction of Class I magazines

A.       Class I magazines shall be of masonry or wood covered with sheet metal, or of metal construction; or a combination of these types. Hollow masonry units used in construction required to be bullet-resistant shall have all hollow spaces filled with a dry sand/cement mix or well-tamped sand. Wood- constructed walls required to be bullet resistant shall have at least a six-inch space between interior and exterior sheathing and the space between sheathing shall be filled with well- tamped sand or sand/cement mix. Metal wall construction, when required to be bullet-resistant, shall be lined with at least a four-inch thickness of brick, masonry, hardwood or sand.

B.       Floors and roofs of masonry magazines may be of wood con- struction. Wood floors shall be tongue-and-grooved lumber having a minimum thickness of 3/4 inch. Roofs required to be bullet-resistant shall be protected by four inches of hardwood or by a sand tray located at line of eaves and covering the entire area except that necessary for ventilation. Sand in the sand tray shall be maintained at a depth of not less than four inches.

C.       All wood at the exterior of magazines, excluding eaves, shall be protected by being covered with black or galvanized steel or aluminum metal of thickness of not less than No. 26 gauge.

All nails exposed to the interior of magazines shall be well countersunk.

D.       Foundations for permanent magazines shall be of substantial construction and arranged to provide good cross ventilation.

E.       Magazines shall be ventilated sufficiently to minimize damp- ness and heating of stored explosives. Ventilation openings shall be screened to prevent the entrance of sparks.

F.       Openings to magazines shall be restricted to that necessary for the placement and removal of stocks of explosives. Doors for magazines for Class A explosives shall be bullet-resistant.

G.      Magazines shall be provided with two substantial locks, and magazine doors shall be kept locked except during the time of placement and removal of stocks of explosives.

H.      Provisions shall be made to prevent the piling of stocks of explosives directly against the walls; such protection, how- ever, shall not interfere with proper ventilation at interior of side and end walls.

I.         Full and semi-trailers are acceptable for the storage of explo- sives when modified to comply with Class I magazine con- struction.

Historical Note

Former Rule 2:35; Amended effective April 7, 1976

(Supp. 76-2).