When in doubt build a double 2 12 header sandwich like we explain next.
How to frame a header for a garage door.
The procedure for constructing a header for 6 inch exterior wall framing can be modified for any wall thickness.
Frame the rough opening for the garage door to 3 inches wider than the garage door you have selected.
Measure the distance from the bottom plate of the wall to a point that is 1 1 2 inches higher that the garage door height.
Cut four 2 x 4 trimmers to this length and nail two each to either side of the rough opening.
Wide a common patio door width.
Header requirement 2 at minimum the header should be 12 wide with doubled 2 4 at opening and ceiling running the width of the door with a 2 4 in the center of the opening for the center bracket to attach to.
In all but the most bizarre situations they ll easily carry the weight for 4 ft.
How to frame a garage doors opening in this case 9ft wide by 8ft tall.
Header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening.
Leave a headroom of 14 or 12 minimum install the header jambs and center pad of the frame using a 2 x 6 lumber for the header jambs and center pad leave at least 5 of space on the sides of the door.
I ll explain the process more extensively as we proceed.
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.
How to measure the finished width and height use of 2x4s for the sides and header.
Wide window and door openings and in most situations be code compliant for openings up to 6 ft.