Employee was working in the undergrate compartment of #2 cooler. Access to this area is thru a 4' square door. When employee entered the compartment, as he stepped forward and stood up, he hit his head on an X brace. He was wearing his hardhat, but felt a ""pinch"" in his neck. EE was taken to Dr.,who placed him on restricted duty (no lift,push,pull>10lbs)until recheck on 7/28/14