(1) Every recessed floor conveyor system must be identified by standard color coding, and so designed and installed to minimize tripping hazards.

(2) All areas subject to wet processes must be provided with drains.

(a) Drain trenches must be provided with gratings flush with the adjoining floor.

(b) Use of curbing in work areas should be avoided in new installations. If the use of curbing cannot be avoided, the design must be such that the curbs do not constitute a tripping hazard in normal working areas. When curbing exists and constitutes a hazard, it must be color coded.

(3) Rails of rail mounted devices such as roll stands must be flush with the adjacent floor, and so installed to provide a minimum of 18 inches clearance between the equipment and walls or other fixed objects.

(4) All corrugating and pressure rolls must be equipped with appropriately designed and installed threading guides so as to prevent contact with the infeed nip of the various rolls by the operator.

(5) A minimum of 4 inches clearance or effective nip guarding must be maintained between heated drums, idler rolls, and cross shafting on all preheaters and preconditioners.

(6) Lower elevating conveyor belt rolls on the single facer bridge must have a minimum nip clearance of 4 inches or effective nip guarding.

(7) Web shears at the discharge end of the double facer must be equipped with barrier type guards.

(8) Slitter stations not in use must be disconnected from the power source by positive means.

(9) Elevating type conveyors must have the floor area color-coded.