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