I am looking at buying some for the shop and I am a cheapskate, so I figure they can't be thqt complex to install. These are the ones I am looking at. https://allsecurityequipment.com/pr...R8grLQMfwgfQOijOSynGhJ-UhbUUCJqhoCj14QAvD_BwE Any advice is appreciated.
What's the advantage for that one? Is it a shaft drive? I can't use a standard type trolley. https://allsecurityequipment.com/pr...MI7cjTweaYkQMV5W9_AB2PUwliEAQYAiABEgJbq_D_BwE
It mounts on the wall next to the shaft and springs. It’s a direct drive instead of having a trolley.
Looks like the best , should be great . The Utility Co garage I worked out of for years had , giant bi fold doors operated with air cylinders