R 408.18123 Storage bins and silos.

Rule 8123. (1) A dry ingredient storage bin or silo shall be equipped with a dust- tight cover secured with gaskets and latches or other fasteners. A cover over a point of entry used by an employee shall be interlocked with the loading and unloading motors to prevent their operation when the cover is open. The cover shall be locked open when the bin or silo is occupied by an employee . (2) When an employee enters a bin or silo, he shall wear a safety belt with spark- resistant fittings attached to a lifeline attended by an employee outside the bin. The employee shall be supplied with fresh air during the time work is being performed within a bin or silo . (3) Illumination provided inside a bin or silo shall be from an explosion-proof light fixture or explosion-proof flashlight . (4) A storage bin having a side more than 5 feet in depth shall be provided with a standard stationary safety ladder both inside and outside the bin, which shall reach from floor level to the top of bin, and from the top of bin to the bottom on the inside, with the ladder end kept away from the moving screw conveyor, or shall be provided with some other means of providing equivalent safety for the employee . (5) A walkway surface shall be maintained in nonslip condition .