EMPLOYEE WAS USING A 4' PRY BAR TO MOVE TOE PLATE INTO PLACE TO BE WELDED. THE PRY BAR SLIPPED OFF THE PIECE OF CHANNEL AND STRUCK THE GRATING THE MAN WAS STANDING ON. THE BLOW DISLODGED THE G RATING CAUSING THE MAN TO FALL. THE EMPLOYEE SUSTAINED BRUISING TO HIS LIVER AND SPLEEN, FRACTURES TO BOTH SHOULDER, PELVIS AND TAIL BONE.