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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.
Benefits of Using Two Torsion Springs. Many garage door installers avoid using two torsion springs when the install a new door in order to save money at the time. Typically, using a single spring instead of two will save just two or three dollars.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.