Have you ever tried to lift a garage door that wasn’t attached to springs? They can be pretty darn heavy. It’s not uncommon for one to be over 100 pounds. And that’s just for an aluminum door. Now imagine the load it puts on a garage door spring to lift one. The spring helps you open and close the door in two ways. The garage door springs are always in a push pull stress zone when idle. When the door is open the spring is forced into a contracted state and wants to push the door closed. There isn’t enough torque to do this until you help it. The same when it’s closed. The springs want to pull the door open as it is stretched. In time replacing garage door springs will become necessary as they will wear out from all this pushing and pulling.
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