EMPLOYEES REPLACING THE NOSE RING CASTINGS ON THE FRONT OF THE KILN (DISCHARGE END). MOVING THE PLATES FROM THE RAMP TO THE KILN SHELL WHERE THE PLATES WERE INSTALLED. WHILE LIFTING PLATES FROM RAMP TO KILN SHELL, EE HURT HIS BACK. EE DID NOT SEEK ANY MEDICAL ATTN. UNTIL JUNE 19, 2004. EE IS OFF WORK AS OF JUNE 20, 2004.