R 408.18133 Dough trough elevator and dump .

Rule 8133. An elevator-type dough trough dump shall be provided with an interlocked gate so that the trough cannot be elevated or lowered until the gate is in position to protect an employee, or the trough shall be controlled constantly by an operator with a full view of the elevator area while dumping and lowering the trough the last 7 feet of travel to the floor .