Section R. 408.18121 - Dry ingredients conveyors generallyRule 8121.
(1) A flour-handling system which has the final delivery end out of sight of the beginning point shall have a control at each point, either of which shall stop the flow of flour.(2) A bag chute with an incline of more than 30 degrees shall be equipped with a stop at the discharge end or the end shall have a means to slow the bags.(3) Wherever any of the various pieces of apparatus comprising a flour-handling system are run in electrical unity with one another, the control circuits for magnetic controllers shall be so arranged that the opening of any 1 of several limit switches, which may be on an individual unit, shall serve to de-energize all of the motors of that unit.(4) A screw conveyor shall be constructed of metal or other non-splintering material.Mich. Admin. Code R. 408.18121