The most popular standard radius track is a 15 radius which requires 15 of headroom to accommodate the curve of the track and all other track components equipment.
Garage door track radius measure.
Step 1 measure the width of the opening at the widest point.
For best results the inside of the garage door opening should be framed with 2 x 6 wood.
One quick rule of thumb in finding out what you have is to measure the height of the track stopping at the bottom.
There are five basic garage door track options although the first two are by far the most common ones used in residential installations.
Nearly all residential garage doors have a track radius of either 12 or 15.
A 12 radius has a sharper track curve and opens lower.
Anything between 91 93 inches is a 15 track radius.
Look for general irregularities such as jambs which are not square.
This is the distance between the right and left sides of the finished opening.
A sharper curve exists on the 12 inch radius and it opens lower than the 15 inch version.