Section 408.11298. Carbide storage indoors.

(1) Inside storage areas for carbide shall not be protected by a sprinkler system.

(2)     Carbide  stored  indoors  shall  not  exceed  600   pounds  (272.2 kilograms). The area shall be dry, waterproof, and  ventilated.  Carbide storage with cylinders of fuel gas shall not exceed  600   pounds  (272.2 kilograms).

(3)   Packages of carbide, except for 1 of each  size,   shall  be  kept sealed. A seal shall not be broken when there is more than 1 pound (.454 kilograms) of any other unsealed package of the same size   of  carbide   in the room.

(4)   Carbide in excess of 600 pounds (272.2 kilograms), but not more than 5,000 pounds (2267.96 kilograms), shall be stored as follows:

(a)   In an inside acetylene generator room or outside generator house.

(b)     In a separate room of a 1-story building, which  may  contain   other occupancies, that is without a cellar or basement beneath  the  carbide storage area. This room shall be constructed as prescribed in R 408.11294 and shall not be used for any other purpose.

(c)   In a 1-story building which is without  a  cellar   or  basement  and which is used for no other purpose. If the building is of noncombustible construction, it may adjoin another 1-story building, but the buildings shall be separated by an unpierced firewall. If the building is separated by less than 10 feet (3.2 meters) from another building, there shall be no openings in the mutually exposed sides within 10 feet (3.2 meters). If the carbide storage building is of combustible construction, it shall  be  not less than 20 feet (6.4 meters) from any other 1- or 2-story  building  and not less than 30 feet (9.6 meters) from any other building  more  than  2 stories.

History: 1979 AC; 1981 AACS.