Section R. 408.11298 - Carbide storage indoorsRule 1298.
(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.Mich. Admin. Code R. 408.11298