My ceiling is 12ft 2 inches, most lifts are in 12 ft range, some a wee bit less, some a wee bit more than 12ft. I have a 10 ft door, regular track, hangs down from ceiling about 14 inches? . The only time its in the way is with my double cab 8ft bed, reading body GMC is on lift. It doesn't bother with Wifes Rav, my Tundra or my Mustang. I have a liftmaster on side and the best insulated door I could find.