> >You might be able to rig a counter-weight that will go down as the
> door goes >up, and if everything is in balance, it should work well.
Take a look at the doors on small hangers at an airport; the door is
hinged in the middle horizontally. It's also hinged to the frame at the
top, and the bottom rides up in a guide. As it opens, the middle of the
door pushes out from the building. It's easy to build yourself, and is
out of the way when open. It uses a small counterweight to keep it open;
Dave Williams had a picture of the one he built for his shop on his site.
Marty Scarr
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