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Torsion springs are normally mounted horizontally above the opening of your garage door. When you pull the door down, cables attached to the bottom corners actually force the springs to wind up, in turn energizing the system.
To have two springs with equal lift that will work with your garage door, we divide the IPPT by 2. This yields the goal IPPT for a pair of new torsion springs. We can then find a pair of springs that match this IPPT that will work with your garage door.n the garage door industry, we refer to the expected number of cycles for a spring as the cycle life. Most garage doors have the space for springs with a longer cycle life. Because of the design of springs, the homeowner tends to have more cycle life options when he installs two torsion springs instead of just one.