How To Measure Garage Door Belt Length

The chamberlain group inc.

How to measure garage door belt length. I have found the procedure for replacing it and i can handle it. Measure area labeled headroom distance between the top of the door opening jamb header and the ceiling or floor joist. This is from inside jamb to inside jamb. As an example a 2 car garage door will need more power to lift than a smaller door.

The belt is old and there are no markings to cross reference. I am interested in buying the correct size belt for my liftmaster 1280lmcr. A minimum of 3 5 to 4 5 is required on either side of the door opening. Take the measurement of the width of your garage opening.

Use a 25 tape measure to make sure that you get an accurate measurement without having to stop along the way make marks and continue. The height of the garage door opening is the distance from the floor to the top of the garage door opening. What i can t find is a source for how to measure the thing. In other words my old belt is approximately 20 feet long if laid out.

Use feet and inches for the clearest and simplest account of the size. 10 is required for the standard extension spring or ez set extension spring system. If there s a simple page describing this process it s eluded me. 12 is required for standard torsion spring and ez set torsion spring system.

Recently my garage door opener belt broke. Grab a measuring tape and go measure your door. Replacing the belt can add years of additional operation to your belt drive garage door opener. The full product line includes residential garage door openers and related garage and home accessories.

This is a very important measurement that determines if you will need an extension kit when purchasing your diy operator. Belt kit 10. The size of it will affect the opener s function so you want to know what size door you have before you go shopping. The garage door is 7 foot tall but the railing from outer pulley on rail to outer edge of sprocket on the opener is 10 feet long.