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 ExamplesTopics Buildingsc2Lift 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. 然后托梁被钉牢。
Word Originlate Middle English giste, from Old French, ‘beam supporting a bridge’, based on Latin jacere ‘lie down’.