STEEL JOINT MEMBER

To provide a steel joint member capable of reducing the weight of a connection where a pillar and a beam part cross.SOLUTION: A composite structure 10 includes a wooden structure 11, a steel structure 12, and a connection structure 13 that connects the wooden structure 11 and the steel structure 12. The connection structure 13 includes: a fire-resistant stress transmission member 25 that has the fire resistance, which transmits the stress of the wooden structure 11; a steel-framed steel joint member 26 that connects the wooden structure 11 and the steel structure 12 via a fire-resistant stress transmission member 25; a first joining member 27 with one end fixed to the steel joint member 26 and the other end joined to the wooden structure 11, which penetrates the fire-resistant stress transmission member 25.SELECTED DRAWING: Figure 1 【課題】柱部分と梁部分とが交差する仕口部分の重量が小さくなる鋼製仕口部材を提供する。【解決手段】合成構造１０は、木製構造１１と、鋼製構造１２と、木製構造１１と鋼製構造１２とを接続する接続構造１３と、を有する。接続構造１３は、木製構造１１の応力を伝達する耐火性能を備えた耐火応力伝達部材２５と、耐火応力伝達部材２５を介して木製構造１１と鋼製構造１２を接続する鉄骨造の鋼製仕口部材２６と、一端が鋼製仕口部材２６に固定され、他端が木製構造１１に接合され、耐火応力伝達部材２５を貫通する第１接合部材２７と、を備える。【選択図】図１