For a single car door place a bath scale in the center of the opening remove all spring tension from the door and lower the door onto the scale.
How to measure garage door extension spring.
The spring should be measure as it is unwound.
1 extension springs are color coated see the chart below and order accordingly.
In order to order new garage door torsion springs you will need to measure as accurately as possible your current spring s and find the.
Note the measurement of the one piece.
Measure the spring from the first to the last coil.
Determine your garage door weight and height.
Many extension spring weights are indicated by the color code painted on the end of the spring.
However spring manufacturers can use different color codes to indicate a specific pulling weight of an extension spring.
2 weigh the door.
Inside diameter 90 of doors have a 2 0 inside diameter 3.
Generally when looking from within the garage if the spring is on the left side it is right wound and vice versa.
In addition to having the weight and height of the door recorded torsion springs need additional measurements for replacement.
How to measure extension springs for your garage door.
This should be done from the inside.
Measure the thickness of the wire in the spring.
After you measure the length of this spring you need to measure the diameter of the spring.
It works as opposites so if the spring is on the right side of the center when looking from inside your garage out to your door it is left wound.
Spring orientation only worry about this if you have a 1 s.
Measurements you ll want to note include.
First measure the length of the spring.
Spring orientation if ordering just one spring left wound or right wound.
Measure the springs at one of the hinges from the steel hook that attaches to the chain at the lower end to the top of the coil spring loop at the upper end.