Enrique pretty much explains it in his post. In my neighboorhood, which is a development, the builder put in these high lift tracks that basically go straight up until there is a small bit of clearance between ceiling / door / tracks. At that point, the tracks arch backward in traditional fashion, but they don't extend as far back as a traditional. In my garage, I have one high lift door, one traditional lift door. The high lift is the door closest to where you enter / exit the house. This was due to the possibility of traditional tracks being too low and potentially harming the homeowner if not paying attention (e.g., you'd ram your head into the tracks). Not really a likely occurrence, given that my garage is really big, but since the house is elevated, I guess it's possible if you are really tall (I am not!). 7T1240 - nice job on that garage!