However as you say 2x6 garage walls are becoming much more prevalent.
Garage door header in 2x6 wall.
In the real world of architects carpenters and lumberyards these bridges are called headers fig.
2x6 walls header help needed.
Window door garage door headers supporting roof loads only.
Just build the headder with 2 1 2 blocks in place of the plywood pads you use on the 4 headder.
Most door frames that are 4 feet wide or less require a 2 by 6 header.
Cut a 2 x 6 piece of lumber and nail to the face of wall exactly in the center of the garage header.
Measure the width of your door frame.
That s the standard way we do it around here.
Click on the image below for clear detail and drawing.
Window door garage door headers supporting roof wall floor loads.
Between 4 and 5 feet the header should be built 2 inches wide and 8 inches long while a larger opening needs a header that is 2 by 12.
Loading conditions are detailed below.
Building a structural header for a garage door opening can be handled on the jobsite and will offer the same structural support as more expensive solid wood beams.
Especially with everyone wanting a heated garage.
Also see assumptions for table development.
You can create this thick header by sandwiching two two by sixes.
In most wood frame dwellings headers are made of dimensional lumber installed on edge.
When in doubt use 2 by 12 inch headers.
Your header must be 5 inches thick from front to back on the finished wall rather than 3 inches as in a two by four wall.
The procedure for constructing a header for 6 inch exterior wall framing can be modified for any wall thickness.
This piece of lumber will be used to attach the center bracket of your garage door spring assembly.
You ve still got the two 2x s with a hollow cavity that can be insulated by the insulation crew.