EE WAS SWITCHING GATES ON CONVEYOR TO SWITCH PRODUCT FROM #2 Q/L TANK TO THE QUICKLIME SILOS. EECLIMBED ON TOP OF CONVEYOR COVER TO SWITCH THE GATE. ON HIS WAY BACK DOWN HE SLIPPED STRIKING H THIGH ON THE HANDRAIL. THE CONVEYOR IS FOUR FT FROM THE WALKWAY AND THE HANDRAIL IS 42"" FROM THEWALKWAY. ON THE OPPOSITE SIDE OF THE GATE A LONGHANDLE WAS INSTALLED TO AVOID THIS FROM HAPPENIN