The approved header schedule gives the jack stud count by header span for the loading on this wall: up to 4 feet, one jack; over 4 feet through 8 feet, two jacks; over 8 feet through 12 feet, three jacks. Each end also requires one full-height king stud. At the 10-foot 6-inch family room opening you count two jack studs and one king stud at each end. What does each end of that opening still need?
- ANothing further; two jacks and one king satisfy the schedule at a span of this size
- BOne additional king stud at each end, because king studs increase with span at the same rate as jacks
- CTwo additional jack studs at each end, because the schedule counts studs per face of the wall
- One additional jack stud at each end, bringing each end to three jacks plus the full-height king
Where to look it up
Explicit exercise assumptions; not a universal code requirement.
Why D is correct
Use only the supplied header schedule: 10 feet 6 inches falls above 8 feet and at or below 12 feet, so each end requires three jack studs. Two are present, leaving one additional jack at each end. The one king stud specified at each end is already present. This result does not establish jack or king counts for a different design.