How To Measure The Length Of A Garage Door Spring

Wire size is the most important measurement.

How to measure the length of a garage door spring.

It is okay to round if you are very close. This determines the strength of the spring. Cut a two by four this length with a handsaw. The spring should be measure as it is unwound.

This should be done from the inside. For other measurements talk to a garage door repair professional or find a 10 coil measurement chart online. 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. Install the two by four vertically at the.

After you measure the length of this spring you need to measure the diameter of the spring. Insert the end of the tape measure between two coils count to 10 coils and pull the measure to the point between the 10th and 11th coils. Measure the circumference of the cable drum and measure the height of the garage door in inches. The only way to measure this accurately is to measure 10 20 30 and 40 coils and find a match on this chart.

Divide the height of the garage door by the cable drum circumference then add one. For example a 14 high door is 168 high. It is okay to round if you are very close. This is the number of turns that are on your spring.

If your 10 coil count measures 2 1 2 inches you have 25 inch wires. Measure the distance from the garage floor to the underside of the door at the outer edge and add 2 inches. The only way to measure this accurately is to measure 10 20 30 and 40 coils and find a match on this chart. The best way to measure the wire size of your garage door springs is to simply measure 10 20 30 and 40 coils.

If you have 1 1 4 inches in a 10 coil count the wires are 0 125. First measure the length of the spring. This determines the strength of the spring. Simply place the two broken ends into place with one another then pull a tape measure across the full length.