FIREPROOF FITTING

To provide a fireproof fitting that can maintain fire resistance performance.SOLUTION: A fireproof fitting includes a double sliding window 1, a window frame 2, and an outer sash 3 and an inner sash 5. The outer sash 3 includes a double-layer surface material 41 having a float glass 42 on the outdoor side and a netless heat-resistant tempered glass 43 on the indoor side, and an outer meeting stile 35 for holding the double-layer surface material 41. The outer meeting stile 35 includes an outdoor depth surface portion 351, an indoor depth surface portion, an inner peripheral depth surface portion, and an outer peripheral depth surface portion, which form a hollow portion 36 along the Y-axis direction. A reinforcing material 39 is installed along the Y-axis direction in the hollow portion 36. The reinforcing material 39 is disposed in the hollow portion 36 in a spaced-apart manner from the outdoor depth surface portion 351 in the Z-axis direction.SELECTED DRAWING: Figure 3 【課題】防火性を維持できる防火建具を提供すること。【解決手段】引き違い窓１、窓枠２および外障子３および内障子５を備える。外障子３は、室外側のフロートガラス４２および室内側の網無し耐熱強化ガラス４３を有する複層面材４１と、複層面材４１を保持する外召合せ縦框３５とを有する。外召合せ縦框３５は、室外見付け面部３５１、室内見付け面部、内周見込み面部および外周見込み面部を有し、これらによってＹ軸方向に沿った中空部３６を形成する。中空部３６には、Ｙ軸方向に沿った補強材３９が設置される。補強材３９は、中空部３６において室外見付け面部３５１に対してＺ軸方向に空間を隔てて配置される。【選択図】図３