Patent ID: 8607842

Claim:
A door assembly having a flexible door panel wound and unwound on a drum to selectively block or permit access through an opening, the flexible door panel having a stiffness, a width, and a length to permit and prohibit access through the opening, the door assembly comprising: side columns disposed on opposite sides of the opening, the side columns extending vertically a distance along a portion of the opening and engaging a marginal edge of the flexible door panel to guide the flexible door panel during vertical movement as the flexible door panel opens and closes the opening; a bottom bar attached to a leading edge of the flexible door panel, the bottom bar having a greater stiffness than the flexible door panel and a narrower width than a distance between the side columns; and, bottom bar guides being disposed proximate a lower portion of the opening, the bottom bar guides including a channel and being configured to engage a portion of the bottom bar, such that the portion of the bottom bar is engaged by the bottom bar guides within the channel only when the flexible door panel is located in at least a partially closed position, wherein a top portion of each of the bottom bar guides is angled outward from the channel.