Section R. 408.16521 - InstallationRule 6521.
(1) A mill or calender shall be secured in a manner to prevent unintentional movement.(2) Such a machine, except where installed in a laboratory, shall not be so placed as to require an operator to stand in an aisle.(3) A mill installed or moved after the effective date of this part shall be installed so that the top of the operating rolls is not less than 50 inches above the floor or the operator's working level.(4) Installation of auxiliary equipment, such as but not limited to feeding and stock removing equipment and blending rolls, shall be guarded by location, barriers, or enclosures so as to not create a hazard. The auxiliary equipment shall not interfere with access or operation of a safety device.(5) A mill or calender shall be electrically grounded.Mich. Admin. Code R. 408.16521