Unlike extension springs that operate via stretching, torsion springs rely on torque to produce movement. For example, when closing the door, the cables attached to the bottom corners wind up and generate stored energy. Opening the door unwinds the springs and releases the energy required to create the lifting motion.
An extension system consists of springs attached to cables at the bottom corners of the garage door. When opening the door, the springs extend and cause the stored energy within them to raise the door. The greater the force applied by hand or electric motor, the more the spring expands. These instructions are not suitable for the older bow arm. Hormann sectional garage door installation manualfor all Z track side mounted springs single sized doors. Instructions for fitting the Hormann retractable up and over door to a timber frame or with a factory fitted steel frame.
Monitor and operate lights and your garage door from your smartphone or tablet! Teckentrup 62 Swing Secure single leaf and double leaf doors - planning, installation and maintenance instructions. We use cookies to provide you with a better website experience. Close this popup to carry on browsing, or click here to find out more about cookies.
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