Step 2 measure the inside diameter of the your garage door spring it will be one of the following.
Overhead door spring winding chart.
All dura lift springs meet the dasma standard rating of 10 000 plus door open and close cycles.
Do not include the winding and stationary ends.
You can find vertical lift doors normally in commercial and industrial applications such as on loading docks.
Determine the wire.
After winding the spring you may need to add or subtract a quarter turn or more.
The spring coils are color coded depending on the spring size and the winding cone is color coded separately either red or black.
Measure the overall length of the garage door spring unwound take all your measurements from the broken spring.
Each torsion spring consists of spring coils stationary cone and a winding cone fig.
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Install new or use this pair of left install new or use this pair of left and right wound torsion springs to replace broken sectional garage door torsion springs.
This video applies t.
Your door will have either one or two torsion springs.
On standard lift doors the formula is dh dc 1 or the door height in inches divided by the drum circumference in inches plus one.