Abstract: A reinforcement system for a sectional overhead door includes a post having a lower end, and an anchor for removably connecting the lower end of the post to a floor. The anchor includes an L-bracket configured to be removably attached to the lower end of the post, and a horizontal leg. An eyebolt removably attaches the horizontal leg of the L-bracket to the floor, and is movably attached to the post. A plurality of door brackets configured for attachment to the door panels each include a selectively positionable clevis pin removably extending through portions of the bracket. A plurality of cables having first and second ends are configured to be removably engaged around the clevis pin of one of the door brackets when the cable is wrapped around the vertical post. The reinforcement system is configured to permit the system to be installed and removed without tools.