The front door of my shop is a 9 foot wide, 6 and a half foot high roll-up door. It is literally that. There are three disks about a foot in diameter and when the door is raised big springs roll it up. It's very thin and conducts a lot of heat in and out. There is no good way to insulate because of the constant flexing and the fact that it rolls up like a rug. I have decided to scrap it and replace it with a double swing-out door that I can insulate. I'm going to beef up the frame so the new door will only be 7 feet wide but it will actually be a little higher because the roll-up door doesn't go up quite all the way. The roll-up door is mounted totally on the inside so I can build the frame and hang the doors before removing the roll-up. No security breach during installation. Oh, yes. I have given considerable thought to how to safely unwind those springs. The sheet comes off the roll and down through channels on each side. Each channel has a stop to prevent the door from going up past the top of the opening. My plan is to remove the stops and tie ropes around the roll to keep it from unrolling. Then I can unwind the springs and unbolt the assembly.
Regards. Max. K 4 O D S. Email: [EMAIL PROTECTED] Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Music site: http://www.maxsmusicplace.com To subscribe to the fun with tubes group send an email to, [EMAIL PROTECTED]
