| 摘要 |
PROBLEM TO BE SOLVED: To provide a steel frame structure fireresistant covering that is thin and has improved fireresistant property. SOLUTION: In a steel frame structure 1 fireresistant covering, an auxiliary heat-insulation layer 4, a thermal inflation fireresistant layer 3, and a flame barrier layer 2 made of a nonflammable material or a semi-nonflammable material are applied successively from the side of a steel frame 5. Then, the thermal inflation fireresistant layer 3 is made of a resin composition containing a thermal inflation inorganic compound, the volume inflation ranges from 1.1 to 30 times by heating for 30 minutes under a heating condition of 50 kW/cm2. The auxiliary heat-insulation layer 4 has a thermal conductivity of 1.5 kcal/m.h. deg.C ore less, and a shrinkage rate in a thickness direction is 10% or less by heating for one hour under a heating condition of 400 deg.C.
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