The Collaborative International Dictionary
Interjoist
Interjoist \In"ter*joist`\, n. (Carp.)
The space or interval between two joists.
--Gwilt.A middle joist or crossbeam.
--De Colange.
Wiktionary
interjoist
n. 1 (context carpentry English) The space or interval between two joists. 2 (context carpentry English) A middle joist or crossbeam.