EMPLOYEE DOING MAINTENANCE WELDING UNDER SHAKER/SCREEN ON SHOOT. WELDED OR TACKED PIECE OF METAL ON SHOOT. STOOD ON TACKED PIECE OF METAL, TACK OR WELD BROKE CAUSING EMPLOYEE TO SLIP AND FALL 2 TO 2 1/2 FEET. EMPLOYEE DID NOT GO TO DOCTOR UNTIL 11/6/01 AT HIS REQUEST.