a long thick piece of wood or metal that is used to support a floor or ceiling in a building搁栅；托梁Extra Examples- Lift any loose floorboards and inspect the joists.掀起所有松动的地板，查看搁栅。
- Check that all the floorboards are securely attached to their joists.检查所有地板是否牢固地固定在其托梁上。
- The ceiling joists must be fire protected.天花板托梁必须防火。
- The joists are then nailed into position.然后将托梁钉入到位。
Topics Buildingsc2Word Originlate Middle English giste, from Old French, ‘beam supporting a bridge’, based on Latin jacere ‘lie down’.