THE EE WAS PULLING ON THE HANDLE OF THE PALLET LIFT FORKS WITH HIS LEFT ARM & OPERATING THE OVERHEAD HOIST WITH RIGHT HAND. AS THE EE BEGAN TO PULL ON THE PALLET LIFT FORKS TO REMOVE THEM FRO M UNDER A PALLET OF EMPTY CEMENT BAGS, HE REPOR TED STRAINING HIS LOWER BACK. THE EE WAS PLACED ON A RESTRICITON ON 4/6/00