The number of jack and king studs shall comply with Table R603.6(9). King and jack studs shall be of the same dimension and thickness as the adjacent wall studs. Headers constructed of C-shape framing members shall be connected to king studs in accordance with Table R603.6.(10). One-half the total number of screws shall be applied to the header and one-half to the king stud by use of a minimum 2-inch by 2-inch (51 mm by 51 mm) clip angle or 4-inch-wide (102 mm) steel plate. The clip angle or plate shall extend the depth of the header minus 1/2 inch (13 mm) and shall have a minimum thickness of the header members or the wall studs, whichever is thicker.
Head track spans shall comply with Table R603.6(11) and shall be in accordance with Figures R603.3 and R603.6. Increasing the head track tabular value shall not be prohibited when in accordance with one of the following:
- For openings less than 4 feet (1219 mm) in height that have a top and bottom head track, multiply the tabular value by 1.75; or
- For openings less than 6 feet (1829 mm) in height that have a top and bottom head track, multiply the tabular value by 1.50.