EE WAS REPAIRING TORN EXPANSION JOINT MATERIAL ON THE LINE 3 PROCESS FAN. AS HE WAS BRINGING MATERIALS TO THE WORK SITE, HE STRUCK HIS HEAD ON A LOW HANGING BEAM. HE WAS WEARING A HARD HAT TRA NSFERRING IMPACT TO NECK. RECEIVED CHART NOTES OON 8/23/02. EE STARTED LOSING TIME ON 8/13/02.