The Storage of Explosives
In Bulletin 17, Bureau of Mines (1911), the statements of B. W. Dunn in his article entitled “Safe Shipment and Storage of Explosives” might be of value to fire chiefs. Mr. Dunn gives an account of how in June, 1909, the chief inspector of the bureau of explosives of the American Railway Association called the attention of the manufacturers of explosives to the danger of storing such material in the vicinity of railway property; and how the manufacturers selected a committee which collected data covering over 130 explosions. In the article is included the following table (given here in a condensed form), which is based upon the work and conclusions of this committee:
Minimum distances betideen barricaded magazines and railways or inhabited dwellings.
Mr. Dunn states that although this table lias not been sanctioned by law, it will probably be accepted as a guide in legal prosecutions. In regard to the storage of explosives, he writes as follows: “Explosives should be protected as far as practicable during storage against heat, moisture, fire, lightning, projectiles and theft. The buildings should therefore be weatherproof, covered by fireproof and bullet-proof material, wellventilated, in secluded locations, and not exposed to fire risk from grass or underbrush. Lightning protectors are best placed on a line of supports encircling the building and 20 to 30 feet distant from it.” Plans and sections of an approved type of magazine arc given. They show the corrugated galvanized iron roof and the purlins and rafters beneath, the spaces between which being filled with mineral wool. The galvanized iron cornice joins the iron roof with tile 8-inch brick wall, making it seem well-nigh impossible for fire to enter. Parts of this bulletin, which can be obtained from the Bureau of Mines, Washington, D. C, would prove interesting reading for firemen.