This isn’t usually true, as a power-outage could trap a vehicle inside without a manual release. This is usually a little rope hanging from the connecting latch on the motor chain or screw-traveler.
If there wasn’t a spring to help lift the door open then the manual release would at best do very little to help you open the door, or at worst send it crashing down uncontrollably if you released it while the door was open.
Trust me, it’s got a spring.
DannyMac@lemmy.world 1 year ago
Hold up, that may not be always the case. My garage door has a spring wound under tension to help the motor lift the door and it is a one-car wide garage door. If that has a catastrophic, uncontrolled release and no one gets hurt, consider yourself lucky.
Hyperreality@kbin.social 1 year ago
Oh, absolutely. Not saying it's not possible. So check to be sure.
Mine doesn't. Used to work maintenance, most electric doors, rolldown stormshutters and theft prevention shutters I encountered didn't have a spring.
On a manual door it's almost certain to use a spring.
Electric not always the case, IME not that often. Motors are apparently powerful enough.