Section 47.64. General requirements

(a) Artificial lighting. All buildings shall be constructed to afford ample daylight for all working parts. Artificial lights shall be provided in accordance with Chapter 27 (relating to lighting) when daylight is not available. In spaces occupied by machinery, or in spaces where dust may collect, open lights are not permitted, except gas lights with hoods, approved by the insurance underwriters. Only standard enclosed tubular lanterns shall be used.

(b) Belt conveyors. All belt conveyors for receiving grain shall have at the point of charge, a hood connected with an exhaust fan of sufficient capacity to remove or prevent the escape of all dust arising from the conveyor, and the fan shall be kept in operation when the conveyor is in use, unless another equally effective dust removing system is provided. This requirement shall not apply to the point at which a railroad car hopper discharges onto a belt conveyor.

(c) Grain garners and malt house elevators. It is recommended that tops of grain garners over scales be covered with wood, metal or other impervious material, and the covers be tight fitting to prevent entirely the escape of dust. This recommendation applies to malt house elevators.

(d) Grain hoppers. Until grain is thoroughly cleaned, hoppers for weighing shall be provided with tight fitting covers of wood, metal or other material, impervious to dust and with flexible dustproof connections to the botton of the garner, if there is a garner. This requirement applies only to weighing hoppers located indoors and to malt house elevators.

(e) Piping. The piping of all exhaust systems and all ducts shall be kept tight.