In light-frame construction, a trimmer is a timber or metal beam (joist) used to create an opening around a stairwell, skylight, chimney, and the like. Trimmers are installed parallel to the primary floor or ceiling joists and support headers, which run perpendicular to the primary joists.
It can also refer to a jack stud that supports a header above a window or door opening.
- "Architectural Graphic Standards Online". Retrieved 2016-07-25.
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- Glossary, building terms, word definitions. Define Cripple Stud
- Hometime Glossary - Framing
- Building a Wall 3 - Three Stud Corner and Windows | DoItYourself.com