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.; [syn: trimmer, trimmer joist]
WordNet (r) 3.0 (2006):
trimmer joist
n 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. [syn: trimmer, trimmer joist]