Door assembly side column configuration

A door assembly comprising:

• a door panel having a top edge, a bottom edge, a first vertical edge and a second vertical edge,
• the door panel being fixed proximate the top edge to a drum, the door panel winding onto and unwinding from the drum to open and close a doorway;
• a first side column and a second side column, wherein the first side column is positioned proximate a first side of the doorway and the second side column is positioned proximate a second side of the doorway, the first side column and the second side column each comprising a guide track and each guide track comprising a first portion and a second portion,
• the first portion of each guide track defining a first guide channel having a first depth extending from a rear portion of each guide track to a first engagement portion of each guide track, the first engagement portion of each guide track further defining a first gap so that the door panel may extend from the doorway through the first gap into the first guide channel, and
• the second portion of each guide track defining a second guide channel having a second depth extending from the rear portion of the guide track to a second engagement portion of each guide track, the second engagement portion of each guide track further defining a second gap so that the door panel may extend from the doorway through the second gap into the second guide channel,
• wherein the second depth is less than the first depth.