Converting from Two to Four Torsion Springs - DDM Garage Doors Blog

When upgrading to longer life torsion springs, it is often better to convert to four smaller springs. This is especially true when the torsion springs are for heavier garage doors.

On a standard two spring system, both torsion springs normally mount back to back to the spring anchor bracket off-centered above the door.

Sometimes each torsion spring weighs over 20 pounds. In these cases, we recommend adding a bracket just beyond the end of the winding cone to support the weight. (The formula for locating the bracket before winding the spring is spring wire times the number of turns plus four inches.)

There is a need for an extra support bracket beyond the end of each torsion spring. Therefore, we can easily use those brackets as spring anchor brackets for additional springs in a four spring setup. All that’s needed are extra 3/8″ by 1″ bolts and nuts.

An inquiry came in from Jordan regarding a 19′ wide by 7′ high door. The door had a coupler in the middle of the shaft. Plus, two spring anchor brackets similar to the one in the image below.

Because the door is so heavy, we are recommending converting to four smaller torsion springs to increase cycle life and manage the weight of the springs.

You can find updated information on our blog titled “Four Spring Residential Torsion Systems.”

If you want to upgrade your spring cycle life without increasing the size of your springs, check out our special new long-lasting torsion springs. These springs can last up to 50% longer than regular springs without changing the length, wire size or inside diameter.

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