WHILE UNLOADING 16' BEAMS ON MAINLINE TRACK AT F-8 OVERCAST, I-BEAM WAS SET ON THE GROUND BY EEAS THE OTHER BEAM WAS BEING SET DOWN IT WAS SLIGHTLY TOSSED IN EE DIRECTION. HIS REACTION WAS A TWIST WITH HIS LEGS TO MOVE FURTHER AWAY FROM WHERE THE BEAM WAS BEING DROPPED. A FEW MIN. LATER HE EXPERIENCED PAIN ON THE OUTSIDE OF HIS RIGHT KNEE. INJURY WAS DIAGNOSED AS A STRAIN.