1. Joist that receives the end of a header in floor or roof framing in order to leave an opening for a staircase or chimney etc.
   - trimmer

Derived forms: trimmer joists

Type of: joist

• genus Acer
• genus Acherontia
• genus Acheta
• genus Achillea
• genus Achimenes
• genus Achoerodus
• genus Achras
• genus Acinonyx
• genus Acinos
• genus Acipenser
• genus Acocanthera
• genus Acokanthera
• genus Aconitum
• genus Acorus
• genus Acridotheres
• genus Acris
• genus Acrobates
• genus Acrocarpus
• genus Acrocephalus
• genus Acroclinium
• genus Acrocomia
• genus Acropora
• genus Acrostichum
• genus Actaea
• genus Actias