Ala. Admin. Code r. 480-3-3-.15
Current through Register Vol. 43, No. 1, October 31, 2024
Section 480-3-3-.15 - Explosives Magazines - Surface(1) All magazines in which explosives are kept or stored shall comply with the requirements of these orders within six (6) months of the date these rules become effective.(2)Location - All magazines in which explosives are kept or stored shall be located at a distance from buildings, railroads and highways in conformity with the Quantity and Distance Table in these rules.(3)Barricades - The term barricaded shall mean a physical barrier either natural or artificial around the magazine, to protect life and limb in buildings and on highways, railroads and railways, from damage by premature explosions. Methods of barricading are as follows: 1. Locate the magazine in an isolated ravine; or2. Excavate at foot or side of hill sufficiently deep to provide protection on the sides and end of the magazine. A two (2) foot space shall be allowed between the magazine and the excavated sides; or3. Construct a substantial barricade of concrete or timber or earth or stone bank.(4) All magazines containing more than two hundred (200) pounds of explosives shall either be barricaded or the distance from inhabited buildings, public railways and public highways shall be doubled.(5) When as much as two hundred (200) pounds of explosives is kept on hand, it shall be stored in a magazine constructed of one of the following materials, and shall be termed as Class "A" Magazine: FRAME: The walls shall be constructed of two inch by four inch (2" x 4") studding with a two inch (2") plank outside wall. The outside wall shall be lined with tongue and groove lumber. The outer wall shall be covered with No. 26 gauge galvanized iron or sheet steel on the outside. The space between the outer and the inner wall shall be filled with dry, coarse sand (not crushed stone or gravel). All dry timber shall be well seasoned and free from loose knots wind shakes, bark edges or decay.
BRICK: or RUBLE MASONRY: The walls shall be eight (8) inches in thickness. The bricks shall be of medium soft variety, or the masonry blocks or granite, laid in cement mortar containing not over twenty-five percent (25%) lime.
CONCRETE: The walls shall be six inches (6") in thickness constructed of four (4) parts sand and one (1) part cement.
TILE: The walls shall be constructed of either six inch (6") or eight inch (8") tile. The space in the tile shall be filled with dry, coarse sand (not crushed stone or gravel).
ROCK: In solid ground or rock ("L"shaped magazines are recommended.)
(a) The foundation shall be of stone laid in cement, concrete or brick piers; or a solid foundation may be used.(b) Magazines of less than thirty thousand (30,000) pounds capacity shall have seven-eighths (7/8) inch tongue and groove flooring. Magazines of larger capacity shall have double floorings.(c) All nail heads shall be counter sunk. No metal shall be exposed within the buildings.(d) The door shall be constructed of at least three (3) layers of seven-eighths (7/8) inch hardwood lumber and metal covered on outside.(e) The roof shall be constructed of at least one (1) inch lumber and covered with No. 26 gauge galvanized iron.(f) For ventilation, four inch by six inch (4" x 6"), or equivalent, openings shall be spaced not more than five feet (5') center to center just below the roof line and at the floor level, covered with wire screen. The floor and ceiling shall be constructed to within two inches (2") of the walls in order to provide air circulation.(g) The magazine shall be located in an isolated place. A damp location shall be avoided. All drain ditches around the magazines shall be kept open at all times.(6)Size of Magazines - The size of the magazine depends upon the amount of explosives to be stored. The dimensions given in the following table are suitable for the amounts indicated. MAIN STORAGE MAGAZINES
DIMENSIONS
QuantityWidthsLengths
1,000 lbs. 6 feet 6 feet
2,000 lbs. 6 feet 7 feet
5,000 lbs. 8 feet 9 feet
10,000 lbs. 10 feet 12 feet
15,000 lbs. 12 feet 12 feet
20,000 lbs. 12 feet 16 feet
25,000 lbs 12 feet 18 feet
30,000 lbs 12 feet 20 feet
40,000 lbs 14 feet 22 feet
50,000 lbs 14 feet 24 feet
(a) When less than two hundred (200) pounds of explosives are kept on hand, it shall be stored in a magazine of the following construction, which is termed a Class "B" Magazine: (7)Class "B" Magazine and Construction - The principle of construction is simply that of placing one substantial box inside of another with a five inch (5") space filled with dry coarse sand (not gravel or crushed rock). 1. The outer box shall be built on the type of an ordinary contractor's tool box, equipped with sloping hinged lid.2. The box shall be constructed of seven-eights (7/8) inch tongue and groove boards or one and one-eighth (1-1/8) inch plan lumber. The outside of the box shall be covered with not less than No. 24 gauge sheet iron.3. The outer box will be one (1) foot longer, one (1) foot wider and six (6) inches deeper than the inner box so that when the inner box is set inside the outer box the tops will be level with each other and there will be a five (5) inch space on all sides for coarse sand filling. The inner box shall be set inside of the larger box and fastened into place.4. The inside of all boxes shall be surfaced. No nail, bolt, or screwheads shall be exposed on the inside of the inner box.5. At the top of each box, on the sides and ends, but one-fourth (1/4) inch by two (2) inch notches, spaced about (1) one foot apart, and not directly opposite.6. Set the box (magazine) so that it is level and support it either on wooden sills, bricks, or piers; keep bottom of the magazine about six (6) inches off the ground.7. Fill space between boxes with dry, coarse sand (not gravel or crushed stone) to within one-fourth (1/4) inch of the top of boxes. To prevent sand from falling into the storage space or into a shifting position, a cover may be placed over the sand space. All magazines shall be provided with substantial locks.(8)Marking Magazines - magazines must be designated by conspicuously posted signs with the words "Magazine", "Explosives", "Dangerous" legibly printed thereon. Such signs shall be so placed that a bullet passing through the sign will not enter the magazine.(9)Detonator Storage Separate - Blasting caps and electric blasting caps shall not be stored in the same magazine with dynamite or powder, but shall be stored in a magazine of similar construction as the dynamite or powder magazines, and not nearer than fifty feet (50') to any other explosives magazine Author: Marcus Davis, Workers' Compensation Examiner.
Ala. Admin. Code r. 480-3-3-.15
Statutory Authority:Code of Ala. 1975, § 25-2-13(2).