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nounbeam used to support floors or roofstype of:
Definition that contains joist
- trimmer 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 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.
- floor joist joist that supports a floor