We had an overhead bi-fold hangar door cable snap yesterday (one of
five). Of course those on the field opened the door anyway. Sigh.

The cable had rusted through inside the guide tube on the wind up
spool. We had one hell of a time getting the old rusty cable out of
that old rusty tube. We are wondering when the other cables will
suffer the same fate.

Questions;

- What type of cable (3/16") should be used? Aviation? Stainless?
Galvanized?
- What kind of swedged stop sleeves should be used? Aluminum?
Copper? Steel?
- How to prevent rusting inside the tube? We greased the cable end in
hopes that this will help.

Thanks, John