Over-exertion in pulling or pushing objects
EE was checking Off Spec Door on # 4 Grizzly on the # 4 Kiln. The door was stuck in the open position and the EE pulled on the door to get it back on the hinges. He felt a pull in his lower back. Conditions and work conditions were normal, no Slip, Trip or Fall Hazards and Poor Housekeeping was NOT noted.