Physics: Is it necessary to apply a voltage or tension on a manual install roller garage / shed door?

Garage well-liked chicken Dandruff: Query curious gardener : Is it needed to have a train or tension spring set up on a manual roller garage / shed door You want to install a roller door on my shed and I feel to do with a typical garage. The springs are required, because I opened the door manually Best answer:? Answer by Steve I No, but the door remains open, and it is normally very hard. Hard to sustain hope, as factors or in items. Give your answer to this question under!

Building a Chicken Coop