Section R614-4-5 - Building ConstructionA. Buildings used for explosive materials shall be of a safe design for the materials being handled and shall be maintained in that condition.B. Heating equipment shall be installed in a manner to prevent ignition, deflagration or explosion of the materials being handled.C. Buildings where dust, fumes, or vapors are possible shall be adequately ventilated, at the source of the hazard. Exhaust fans through which combustible dust or flammable vapors pass shall be equipped with nonsparking blades (or casing lined with nonsparking material) and approved motors. The entire ventilating system shall be bonded electrically and grounded properly.D. Cleaning and collection systems shall be installed and maintained in a manner that takes into consideration the materials being handled.Utah Admin. Code R614-4-5