How To Determine Garage Door Tension Force

This is sometimes referred to as the spring s lift power how much weight the torsion spring can lift.

How to determine garage door tension force.

Call a professional if you don t feel confident dealing with a spring under this much tension. Measure to the nearest 1 16 of an inch. If the door is hard to raise the tension at the hinge springs is too loose and the automatic closer must work too hard to raise the door. The only way to measure this accurately is to measure 10 20 30 and 40 coils and find a match on this chart.

This determines the strength of the spring. If your door is 210 pounds you would need a pair on for each side of the 210 pound white springs. Note that because the garage door will be down this will mean. Unplug the opener if you have an automatic garage door.

Close the garage door. 1 divide the total spring s ippt by the cable drum multiplier 2 multiply the spring ippt by the number of turns and then divide by the hi moment arm high lift. Raise the door using the handle on the outside. When the garage door is open the spring is in its equilibrium state natural condition.

The spring s individual measurements are also important they determine the spring s lift. The springs will be under tension which increases the risk of injury. Torsion springs and garage door weight torsion springs need to provide enough force to equal the weight of the door. When the garage door is closed the torsion spring is in its deflected condition torqued up.

It is okay to round if you are very close. Measure the distance from the top of the closed door to the bottom of the horizontal track. It should be noted that since the cable loops around a pulley the lifting force of a 210 pound spring is only 105 pounds as seen by the garage door. During the twisting motion of the torsion spring it exerts the force required in order to keep the door balanced and light to operate.

Wire size is the most important measurement.