How are garage door springs kept under control?

Question

I understand the basics of how a garage door works – the opener motor is assisted by the spring’s stored energy, otherwise the door would require a *much* larger motor to lift it.

But, some of these springs really look monstrous, and I’m wondering – how is their stored energy controlled? How do we ensure the spring releases just enough energy to assist the motor, and doesn’t just launch the door into orbit?

In: 5

Answer 1

And then they get old and while under tension opening they suddenly explode like a nuclear bomb and almost kill you.

Then you go try to open your door without them and you can’t because your door weighs like 400 pounds

Ask me how I know….