Most extension springs for 7 foot high doors are 25 inches long with a 42 inch stretch.
Garage door extension spring weight.
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.
As an example a 25 gauge 16 7 standard residential garage door from clopay midamerica overhead door c h i martin hormann wayne dalton unique raynor amarr haas midland doorlink garaga northwest delden and windsor will weigh 150 160 lbs and insulated garage door weigh 165 180 lbs.
Starting with our easy to use selection tool you can easily find the garage door extension springs you are looking for the 1st time.
Dasma spring color codes.
The garage door industry has a standard color chart for the strength pull for springs.
Door with an initial tension of 165 lbs.
Plug end extension spring is a holmes spring replacement for heavier 1 piece tilt up canopy style garage doors.
Plug end extension spring is a p528 28 in.
Two p528 springs one on each side of the door can handle a 105 lbs.
Total door weight indicates the springs you will need for example if the door weighs 100 pounds you need two 100 pound springs one on each side.
7 door 8 door.
When using two scales add the weights together for the total door weight.
If door weight exceeds capacity of the scale use 2 bathroom scales.
Measurements you ll want to note include.
Add the respective weight from each scale together to get the total weight of the garage door.
Garage door weight vs extension spring size.
For an 8 foot high door the spring would be 28 inches long with a 48 inch stretch.
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Finding the right extension springs for your door is easy if the color hasn t worn off the end.
How to choose garage door extension springs.
Blue 100 tan 110 white 120 green 130 yellow 140 blue 150 red 160 brown.
80 gold 90 lt.
Weight of the door the weight of the door can be difficult to calculate but it s a crucial measurement because the springs need to counterbalance the weight to function properly.
Plug end extension spring is a p528 28 in.
Door with an initial tension of 165 lbs.
Plug end extension spring is a holmes spring replacement for heavier 1 piece tilt up canopy style garage doors.
Two p528 springs one on each side of the door can handle a 105 lbs.