Step 6: Add the Extension Springs

Two springs counteract the weight of the door and make it easier to lift. Before we can attach the spring, we lift the door open and tighten C-clamps to the tracks to prevent the door from closing. One end of each spring hooks on to an open eyebolt threaded to the metal hanger; the other end connects to a sheave or pulley wheel. To keep the springs from sagging below the track when the door is opened, we stretch a steel cable horizontally through the center of each spring.
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    Tools List

    • drill
      Impact driver, for driving screws through hinges and brackets
    • locking pliers
      Locking pliers, used to hold open the door while the spring is attached
    • ratchet wrench
      Ratchet wrench, used to tighten nuts on machine screws
    • ladder

    Shopping List

    Sectional garage door, hinged panels that roll on tracks

    Assorted garage-door hardware and tracks, used to support the door in doorway opening

    Decorative hardware,to mimic handles on traditional outswing doors