| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fire limit through part structure which can be constructed independent of the outer peripheral length or shape of piping, is excellent in construction workability, and is excellent in fire resistance. <P>SOLUTION: The fire limit through part structure includes: the piping inserted to the through-hole of the section of a structure; a thermally-expansible fireproof sheet installed on the outer periphery of the piping; and a piping support formed of a metal plate including a piping support part and a section fixing part. The piping support is formed by deforming the piping support part of the metal plate along the external shape of the piping and bending the section fixing part of the metal plate in parallel with the section, and the section fixing part of the piping support is fixed to the section. With the noncombustible material layer of the thermally-expansible fireproof sheet on the outer side and the thermally-expansible fireproof material layer of the thermally-expansible fireproof sheet on the inner side, the thermally-expansible fireproof sheet is installed on the outer periphery of the piping and is fixed to the piping support. <P>COPYRIGHT: (C)2012,JPO&INPIT |
