Step 1
Review the plans to ensure the header beam for the window or door opening is the correct size. A house built with standard 2-by-4 framing may call for two 2-by-6 boards joined or two 2-by-10 boards joined and used as the header, depending upon the engineering structure of the wall. Verify with the materials list and engineering specifications for any header call-out details.
Step 2
Measure the starting point of the header in the wall on the bottom plate. At that location, place a jack stud to support the header. The jack-stud height is the same height as the opening. Measure the width of the opening and place another jack stud at that point in the wall. Toenail both jack studs into the bottom plate of the wall frame using two nails approximately 1/2 inch in from the outside edge of the stud.
Step 3
Place a king stud, a standard-sized stud, equal to the other studs in the wall, adjacent to the exterior of each jack stud. Toenail the king into the bottom plate and nail the king stud to the jack stud at regular intervals according to the nailing plan in the engineering specifications.
Step 4
Fit the header between the king studs atop the jack studs. Toenail up underneath the jack stud into the header on both studs. Use 3-inch nails to nail the king stud to the header on either end.
Step 5
Add cripple studs, 16 inches on center above the header. The height of the cripple studs must end at the wall height. Measure the distance from the top of the header up the remainder of the king stud above the header and make the cripple studs the same height. Leave the entire opening empty beneath the header if it is a doorway. If it is a window, add cripple studs and the sill plate to create the bottom dimension of the window. Nail in place.