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 look up garage door spring size.
In the first example the spring is too small.
Selecting the right garage door spring.
If you have a broken torsion spring read below to make the measurements you need and then purchase a new garage door spring or springs.
These springs typically come in 1 3 4 2 and 2 1 4 inside diameters.
For a double door use two bath scales a foot in from each side of the opening.
If the spring is in one piece you can normally find the id on the cones p175 for 1 3 4 and p200 for 2.
Typically residential springs will have a 1 3 4 or 2 inside diameter.
How to know the garage door spring to buy 1.
Contrary to what most believe you don t need to actually unwound the spring in order to measure the length of the spring.
Determine the wind direction.
Standard residential torsion springs are found on a shaft above the center of the garage door.
In the video below you see two cases of improper spring size.
Springs are too big.
Inside diameter 90 of doors have a 2 0 inside diameter 3.
Measure the wire size.
Step 2 determine spring wind.
Opening and closing the door with springs that are too small can end up damaging your garage door and your opener.
In order to order new springs you will need to measure as accurately as possible your current spring s and find the.
Measure the length of ten or twenty coils of the particular spring.
2 means the inside diameter is two inches etc.
For your broken spring s measure the inside diameter of the spring.
For a 7 foot tall garage door you should put 29 quarter turns on each spring.
Springs are too small.
When replacing garage door springs we always weigh the garage door and figure the ippt to ensure we.
Spring orientation if ordering just one spring left.
Usually most garage doors.
When the spring is too small the door is way too heavy.
Torsion spring inside diameter and overall length in many cases the inside diameter of the torsion spring will be indicated on the stationary cone in between the two springs at the midpoint of the door.
Height of the garage door can also affect the size of the spring or spring combination needed as well.
Spring length how long each spring is 4.