I've seen multiple overhead doors side by side that each runs on its own set of tracks. Once all the doors are open, the
vertical track portions of the doors that get in the way of the clear opening are removed via a couple of clips. The
open doors are fully supported by the overhead tracks still in place. You then re-install the vertical tracks when ready
to close the door.

--
Dan D.



..
"Jean-Paul Roy" wrote in message ...
How can you get a 40 ft garage style door to work properly. Can you imagine
one track holding each end. Wouldn't the midlle colapse when in the up
position?

J.P.
"Musky" wrote in message
...
Rollers, folders.... all asking for trouble. Why not a garage-door
style door, single piece and folding upward with help from low-tech
springs? That's what we recommend for county hangars. Very low
maintenance, can be automated, and don't flop around in the wind.

My opinion only, of course.