| 摘要 |
PROBLEM TO BE SOLVED: To provide a refractory structure capable of easily improving fire resistance of a block penetration part through which an iron-cast refractory joint pipe penetrates.SOLUTION: A refractory structure has such a structure that a refractory pipe body 11 is coupled with a cast-iron refractory joint pipe 61 through which a floor slab 71 of a building penetrates. The refractory pipe body 11 has a resin pipe body 12 having fire retardancy, and a covering material 21 provided on an outer periphery of the pipe body 12. The covering material 21 includes an inorganic fiber layer 22 having fire resistance. The refractory structure is provided with a supporting tool 51 supporting the covering material 21 to the floor slab 71. |
