(~s)
Joists are long thick pieces of metal, wood, or concrete that form part of the structure of a building, usually to support a floor or ceiling.
= beam
N-COUNT
(~s)
Joists are long thick pieces of metal, wood, or concrete that form part of the structure of a building, usually to support a floor or ceiling.
= beam
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012