Section R. 408.14443 - CupolasRule 4443.
(1) A skip hoist or charging machine, unless completely enclosed, shall be equipped with: (a) A warning device to announce movement.(b) An interlocking gate across the bucket loading opening.(2) An employee working in a cupola shall be protected from falling objects by an overhead guard.(3) A cupola bottom shall be: (a) Supported by 2 or more metal props of structural strength with overall safety factor of not less than 10 to support a full capacity load and adjusted to proper height by wedges or screw jacks.(b) Dropped only after a general warning has been sounded and all persons are removed to a safe distance or protected by a permanent or movable enclosure or screen.(c) Dropped into an area free of water.(4) A slag hole shall be shielded to protect an employee from spattering slag.(5) Where oxygen is used to blow or cut tapping holes, a screen or guard shall be used to protect nearby employees from hot blown material.(6) An employee not wearing light attenuating goggles or shields shall be protected by a screen or wall from the arc of an electric furnace.Mich. Admin. Code R. 408.14443