Do not include the winding and stationary ends.
Overhead door spring winding chart.
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Each torsion spring consists of spring coils stationary cone and a winding cone fig.
All dura lift springs meet the dasma standard rating of 10 000 plus door open and close cycles.
Measure the spring only from coil to coil.
This video applies t.
3 3 8 or 3 3 4 step 3.
After winding the spring you may need to add or subtract a quarter turn or more.
You can find vertical lift doors normally in commercial and industrial applications such as on loading docks.
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.
Step 2 measure the inside diameter of the your garage door spring it will be one of the following.
Both the winding and stationary cones are professionally installed for safe operation.
Your door will have either one or two torsion springs.
Measure the overall length of the garage door spring unwound take all your measurements from the broken spring.