Sec.29-349-264. Buildings used for mixing of blasting agents

(a) Buildings used for the mixing of blasting agents shall conform to the requirements of this section, unless otherwise specifically approved by the State Fire Marshal.

(b) Buildings shall be of noncombustible construction or sheet metal on wood studs.

(c) The layout of the mixing building shall be such as to provide physical separation between the finished product storage, and the mixing and packaging operation.

(d) Floors in the storage areas and in the processing plant shall be of concrete, metal or other approved material. Isolated fuel storage shall be provided to avoid contact between molten ammonium nitrate and fuel in case of fire.

(e) The building shall be well ventilated.

(f) Heat shall be provided exclusively from a source outside the building. However, space heaters that do not depend on combustion processes within the heating unit may be satisfactory if they are located overhead to provide a minimum clearance of 30 inches from raw materials and finished products. The space heaters must also meet the requirements of the most recent edition of the National Electrical Code for the specific type of hazard encountered.

(Effective December 24, 1987)