EE WAS LIFTING PIECES OF STONE FROM A PALLET AND PUTTING THE PIECES ON A CONVEYOR BELT TO BE CUT. EE FINISHED THE WORK DAY. THE NEXT DAY HE SAID HIS BACK WAS SORE & WENT TO CHIROPRACTOR. HE SH OULD NOT HAVE LIFTED PIECES OF STONE THAT WERE TOO HEAVY. A FORKLIFT IS AVAILABLE AT ALL TIMES.