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joist

DEFINITIONS OF: joist

1

n beam used to support floors or roofs

Types:
floor joist
joist that supports a floor
trimmer, trimmer joist
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.
Type of:
beam
long thick piece of wood or metal or concrete, etc., used in construction
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