If your torsion spring is unbroken and unwoun simply measure the length of the spring. Articlesidcspring. Dec When a garage door torsion spring breaks in half, both parts must be pulled together on a flat surface to get a proper measurement of the length.
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: 1. The term "Industry standard" is used in reference to standard garage doors, and if you were to send in pictures of your garage door these springs might be. Sep Inside diameter is the measurement of the hollow inside part of a spring.
To order torsion springs for your garage door, you will need to determine the following for each spring: inside. For broken torsion springs measure the inside diameter of the spring.