根ね太だねだじ字FuriganaMeanings1nounjoistA horizontal structural member used in flooring, supporting the floorboards. Technical term in architecture and construction.床ゆか下したの根ね太だが腐くさっているので交こう換かんが必ひつ要ようだ。The joists under the floor are rotten, so they need to be replaced.
