Your door will have either one or two torsion springs.
Overhead door spring winding chart.
Both the winding and stationary cones are professionally installed for safe operation.
You can find vertical lift doors normally in commercial and industrial applications such as on loading docks.
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.
Determine the wire.
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Measure the overall length of the garage door spring unwound take all your measurements from the broken spring.
Do not include the winding and stationary ends.
All dura lift springs meet the dasma standard rating of 10 000 plus door open and close cycles.
The spring coils are color coded depending on the spring size and the winding cone is color coded separately either red or black.
After winding the spring you may need to add or subtract a quarter turn or more.
This video applies t.
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.
Measure the spring only from coil to coil.