## What size is my garage door torsion spring?

Basically, you run a tape measure along the length of a spring, and take down the number of inches. Therefore, if your tape measure indicates that a torsion spring is 36 inches from one end to the other, that’s a 36-inch — or three foot — torsion spring.

### What size spring does my garage door need?

Generally, most residential garage doors are either seven or eight feet tall. Seven-foot doors usually use a 25-inch spring, and eight-foot doors use a 27-inch spring.

Can I use a different size torsion spring on a garage door?

At times the garage door may be designed to take advantage of two different size springs which ensure optimal balance. Torsion springs are available in many different strengths and sizes, so finding one that exactly meets the manufacturer’s specifications isn’t difficult.

What happens if garage door spring is too strong?

When garage door springs are too large, they provide more strength than the door needs. It will open with too much force, rolling up very quickly and compromising its safety. Kids or even unprepared adults could be knocked over by the sudden force when they try to open it.

## Can I use a heavier garage door spring?

If your garage door springs have lasted less than five years, or if you plan to live where you are for many years, you may want to try the extra long life torsion springs. By using larger springs, you can, in most cases, quadruple your spring life while only doubling the cost of the springs.

### How do you size a spring?

How to Measure a Compression Spring

1. Measure the spring wire diameter, preferably to 3 decimal places for accuracy using calipers.
2. Measure the outside diameter of the coils.
3. Measure the length in its free condition (uncompressed).
4. Count the number of coils.
5. Note the winding direction of the coils.

How do you calculate torsion spring force?

Torsion spring torque is calculated the same way you calculate a working load. To calculate the torque of a torsional spring you must divide the spring rate by the amount of degrees of deflection your spring will be required to travel.