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Whats the difference between torsion springs and extension springs?

April 26, 2017extension Springs torsion

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Whats the difference between torsion springs and extension springs?

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Torsion springs are located directly above the door and the springs are wound up in a rotational manner. Extension springs are located on each side of the door, either beside the vertical tracks, or alongside the overhead tracks and the springs extend or stretch as the door closes.