I estimate the weight of my garage door to be about 60 to 80 lbs. It has two sets of springs (that stretch) on both sides; a small spring inside a larger spring on each side. I have replaced them several times in the past. My nephew tells me there are horizontal torsion springs available (preferably Industrial, commercial type) that go across and above the garage door that lift the door by the action of the spring twisting tight to lift the door and twisting loose to bring the door down. My question is who manufactures these springs?

I am going to install an opener on the garage door in my new home. The door is uninsulated aluminum 16x7. The man at the store where I bought the opener told me to call the door manufacturer to find out what kind of bracing is needed for the door to keep the opener from bowing it. The instructions with the opener say the same thing, and there is a sticker on the door saying that a opener kit is required. The problem is that I can't find who the manufacturer is anywhere on the door. I was wondering if I really need something specifically from the manuf. or would bolting on some angle iron do the trick?