| 摘要 |
PROBLEM TO BE SOLVED: To secure sufficient fireproof performance by attaching the steel frame structural member of an attic space on the ceiling member of a collectively fireproof coated building by surrounding an embedded illuminator with the thermal expansion composite sheet of prescribed fireproof performance. SOLUTION: Butyl rubber, polybutene, water-added kerosene resin, neutralization-treated thermal expansion graphite, ammonium polyphosphate and aluminum hydroxide are melted and kneaded by two rollers to form an adhesive thermal expansion fireproof sheet 81. When the thermal expansion fireproof sheet 81 is irradiated at the heating value of 50 kw/m2 for 30 minutes, the change of thickness is 1.1-30 times. The thermal expansion fireproof sheet 81 is laminated on a hot dip zinc-coated steel plate 82 to form a thermal expansion composite sheet 8. A steel frame member arranged in an attic space is provided on the fireproof ceiling material 7 of a collectively fireproof coated building, a cylindrical housing part with a top board arranging the thermal expansion composite sheet 8 is previously provided, and an embedded illuminator 1 is attached thereto, thereby secures sufficient fireproofness of the attic space 10. |
