| 摘要 |
PROBLEM TO BE SOLVED: To effectively block fire spreading due to heat conduction via a CFT column (concrete-filled steel column), to ensure the performance of prevention of fire spreading, and to use the CFT column without a fire resistive sheath, in a fire compartment having the CFT column. SOLUTION: A thermal insulation slab formed of a noncombustible material is set at a joint portion between the CFT column and a fire wall, and a section in the vicinity thereof is set as a heat dissipation section of fire heat into internal concrete by a thermal shielding function of the thermal insulation slab. The heat dissipation section is set to at least 300 mm, and the heat insulation slab is set to have the thermal conductivity of 0.2 or less and the thickness of 20 mm or more.
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