(1) Swiveled double-bar gates must be installed on all warpers operating in excess of 450 yards per minute. These gates must be so interlocked that the machine cannot be operated until the gate is in the "closed position," except for the purpose of inching or jogging.

(2) "Closed position" must mean that the top bar of the gate must be at least 42 inches from the floor or working platform; and the lower bar must be at least 21 inches from the floor or working platform; and the gate must be located 15 inches from the vertical tangent to the beam head.