| 摘要 |
PROBLEM TO BE SOLVED: To provide a fire-resistive covering structure capable of securing a larger diameter and fire-resistance performance for a through-hole provided on a structural member.SOLUTION: A fire-resistive covering structure, to cover a structural member having a through-hole with a fire-resistive covering material, includes a thermal diffusivity coefficient material which covers an edge face of the through-hole and has a lower thermal diffusivity coefficient than the fire-resistive covering material. The fire-resistive covering material covers the structural member so that a sum of a cladding thickness of the fire-resistive covering material on a surface of the thermal diffusivity coefficient material and a thickness of the low thermal diffusivity coefficient material is less than the cladding thickness of the fire-resistive covering material at other portion of the structural member. |
