SEVERAL EE WERE CHANGING SCREENS. THEY PLACED A NEW SCREEN ON TOP A HANDRAIL IN ORDER TO PUSH SCREEN OVER THE SIDE. NO ONE WAS OBSERVED IN THE AREA. HOWEVER THE INJURED PARTY CAME DOWN THE STE PS UNDER THE SCREEN & WAS STRUCK ON THE FOOT. PIECES OF BELTING LYING ON THE PLATFORM HAD OBSTRUCTED HIS VIEW OF THE AREA.