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Jamb studs

A jamb stud is a stud immediately adjacent to an opening, so it supports a greater share of load than a common stud. Jamb studs can be large single ones or two or more stud nails laminated together.

Diagram of a part of a wall frame around a window opening, showing a (secondary) jamb stud.

Jamb studs in external walls and other load bearing walls must not be:

  • notched within the middle half of their height
    or
  • within the height of the opening.