I've got suspended sliding doors on one end of my shop, and I'm planning to add a piece of angle iron on the floor with the V shape pointing up and some V-groove rollers to guide the bottom of the doors. A good wind turns them into sails when they're only suspended from the top. The other end of the shop is going to get a roll-up accordion door. Two of the school shops I ran for 20-something years had them, and they're absolutely the best way to go. No overhead interference, and they last forever with minimum maintenance.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!