Garage Door Spring Length Determine Weight

Most extension springs for 7 foot high doors are 25 inches long with a 42 inch stretch.

Garage door spring length determine weight.

Weight of the door the weight of the door can be difficult to calculate but it s a crucial measurement because the springs need to counterbalance the weight to function properly. This is not as simple as just measuring the spring from side to side because torsion springs are labeled based on unwound length. Springs that work for a standard height door won t work for an extra tall door because the springs will need to extend farther. If you need a new garage door torsion spring you will need to know what length you need to purchase.

Heritage garage door has served southern california homeowners for over 30 years. Once you know the total weight of your garage door using a bathroom scale for doors under 300 pounds you can use the chart below to see the color extension spring you need. For a more accurate measurement start at the 1 mark on your ruler. Door weights 150lbs and under will be shipped with 1 high cycle life torsion spring.

For an 8 foot high door the spring would be 28 inches long with a 48 inch stretch. Remember that if you have two springs on your torsion system and only one is broken to double the weight shown on the scale. Garage door spring size. Steps to measuring your garage door torsion spring.

Extension springs vary in length.