| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a penetration work structure for a fire compartment with a thermal expansive sheet capable of securing a sufficient pipeline closing effect while restraining cost increase. <P>SOLUTION: A through-hole 23 is drilled in a concrete slab 21. A joint 25 integrated with a joint portion 27 and a pipe portion 29 is arranged in the though-hole. An outer periphery of the joint 25 in the through-hole is covered with the thermal expansive sheet 27. A thickness X (mm) of the thermal expansive sheet is set to 3(R/t)<SP>1/2</SP>/A≤X≤6 (R/t)<SP>1/2</SP>/A (where R is an outer diameter of the coated portion of the piping means (mm); t is a thickness of the coated portion of the piping means (mm); A is a foaming coefficient of the thermal expansive sheet). <P>COPYRIGHT: (C)2003,JPO</p> |
