How Far To Stretch One Piece Garage Door Extension Springs

Let s say you re looking at a seven foot extension spring 25 x 42.

How far to stretch one piece garage door extension springs.

Garage door extension springs run along the door s horizontal track and help to open and close your garage door as the springs stress and compress. Most extension springs for 7 foot high doors are 25 inches long with a 42 inch stretch. The bottom of the spring is held stationary while a piece of the hardware secures the top of the extension spring to the lever arm. Replacing your own garage door side extension springs could save you hundreds of dollars.

Measure door the height. Door while 4 x sl728 springs can handle up to 300 lbs. Apex hardware carries a full line of one piece garage door extension springs whether you need a replacement or a whole new set of hardware apex has what you need to get the job done. For a complete list of garage door extension springs for 7 8 9 10 11 12 13 and 14 tall doors click here determine the door weight and door height.

3 springs are only sold in pairs. This means for a 7 foot high door 84 inches the spring stretch would be 42 inches. Lock end extension spring is a holmes spring replacement for most one piece garage doors. Extension springs are manufactured specifically for the height of a garage door.

On sectional garage door springs this normally is 15 percent. Introduction to one piece single panel door springs. 2 x sl728 springs can handle up to a 150 lb. In most cases the stretch of the extension spring should be half of the door height.

For example a 100 pound pull spring requires 15 pounds of weight to separate the coils. When a door is open the two springs will support 15 pounds of door weight without any stretch. The pull weight of an extension spring is determined by the color code found on the end of the spring. When the one piece single panel door is fully closed the extension spring is stretched to its longest length.

Most extension springs are made of oil tempered wire. I recommend however that you also replace any open hook spring brac. Starting with our easy to use selection tool you can easily find the garage door extension springs you are looking for the 1st time. The e900 hardwrare sl728 28 in.

The single panel door spring pulls down on the. For an 8 foot high door the spring would be 28 inches long with a 48 inch stretch. Save some money by replacing garage side extension spring on an old one piece garage door by yourself.