Replace the garage extension springs on a 12 foot tall overhead door with these spring pairs from North Shore Commercial Door. Extension spring systems counterbalance the weight of a garage door to make opening/closing safer and easier. Extension springs install with a heavy duty S-Hook to the stationary brackets that hang horizontal garage door tracks from the ceiling, while the other end of the spring is hooked to a garage door cable-and-pulley assembly connected to the door. As the door closes the springs extend, lightening the load and lowering it slowly. The springs retract to help the garage door opener, torsion springs, and open the door As the door opens the springs retract to pull the door upwards into the open position. Initial spring tension is enough to hold the door open on the horizontal tracks. Extension springs are color coded by weight and are available in weights ranging from 90 lbs to 390 lbs.
For a complete list of garage door extension springs for 7 foot, 8 foot, 9 foot, 10 foot, 11 foot, and 12 foot tall doors Click Here.
Replacement springs for 12 ft. high doors
For overhead doors
Sold in pairs
Spring Manufacturers color code springs to ensure the correct spring is chosen for your door
High quality new springs to replace old springs for garage door repair and home improvement
Springs extend as the door closes, retract as door opens
Acts as a counterweight to a garage door
Makes closing and opening safer and easier
Springs are color coded by weight
Available door weights ranging from 50 lbs to 540 lbs.
For a Complete List of Garage Door Extension Spring Accessories Click Here
Determine the door weight and door height:
1. The pull weight of an extension spring is determined by the color code found on the end of the spring. See Chart Below.
2. Measure door the height.
3.Springs are only sold in pairs. If you cannot determine the color code, it will be necessary to weigh the door.
To Weigh Your Door:
1. Raise door completely. Disconnect power and lifting arm of garage door opener.
2. Fasten "C" clamps or vice grips under bottom rollers to retain door. With tension completely off extension springs, disconnect springs from track support.
3. Remove "C" clamps or vice grips and lower door by hand. Note that entire weight of door, which could exceed several hundred pounds, has to be lowered slowly by hand so more than one person is needed.
4. Set bathroom scale to zero and place under center of door and record door weight.
5. If door weight exceeds capacity of the scale, use 2 bathroom scales. Add a 2 x 4 with one end on one scale and the other on a second scale with the door perpendicular to the 2 x 4. Add the respective weight from each scale together to get the total weight of the garage door.