Install the header jambs and center pad of the frame using a 2 x 6 lumber for the header jambs and center pad.
How to frame a 16 ft garage door.
How to frame a garage doors opening in this case 9ft wide by 8ft tall.
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.
Leave a headroom of 14 or 12 minimum.
Cut four 2 x 4 trimmers to this length and nail two each to either side of the rough opening.
Frame the rough opening to 3 inches wider than the garage door size you have selected.
Using 16 penny nails attach the jamb boards at the top and bottom.
Make sure the jambs are plumb by using a six foot level.
Leave at least 5 of space on the sides of the door.
How to measure the finished width and height use of 2x4s for the sides and header.
If you are installing a 9 wide door the opening will be 9 3 wide.
Frame the rough opening for the garage door to 3 inches wider than the garage door you have selected.
Width of garage door opening standard widths are 8 9 10 12 14 16 17 and 18 height of the garage door opening standard residential heights are 7 7 6 8 header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening.