Abstract: A multi-section overhead door having an impact-proof bottom panel for improved safety and durability is disclosed. The door is displaced vertically along parallel tracks to which it is coupled by means of rollers. Impact with the bottom panel of the door when in a raised position results in the disengagement of the track rollers from the bottom panel and the displacement of the bottom panel from alignment with the tracks. With the impact force removed, the bottom panel resumes its original position between the tracks to which it can be remounted by conveniently repositioning the track rollers thereon. The bottom panel includes front and rear rubber surfaces with a urethane filler therebetween and a flexible bottom nosing seal.