The vertical member that supports a door header in a rough opening is the

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Multiple Choice

The vertical member that supports a door header in a rough opening is the

Explanation:
When a door is framed, the header above the opening carries the load from above and must transfer that load down into vertical supports directly beneath it. The vertical member that does this is the jack stud, also called a trimmer stud. They sit next to the king stud and bear the ends of the header, transmitting the load down to the bottom plate. The king stud runs full height and helps frame the opening, but the actual support for the header comes from the jack/trimmer studs. The sill plate sits at the bottom of the wall and isn’t responsible for supporting the header.

When a door is framed, the header above the opening carries the load from above and must transfer that load down into vertical supports directly beneath it. The vertical member that does this is the jack stud, also called a trimmer stud. They sit next to the king stud and bear the ends of the header, transmitting the load down to the bottom plate. The king stud runs full height and helps frame the opening, but the actual support for the header comes from the jack/trimmer studs. The sill plate sits at the bottom of the wall and isn’t responsible for supporting the header.

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