| 摘要 |
<p>[Problem] To provide a fire-retardant compartment passage structure which can be easily constructed, and with which an expansion residue formed when a thermally expansive fireproof sheet is heated by flames of a fire or the like does not readily detach and fall off. [Solution] This fire-retardant compartment passage structure comprises: a compartment provided to a partition of a structural body; a through hole provided in the compartment; tubing inserted through the through hole in the compartment; a thermally expansive fireproof sheet which covers, along at least one surface of the compartment, the whole of the through hole around the periphery of the tubing; and a fixation member for fixing the thermally expansive fireproof sheet to the compartment. The fire-retardant compartment passage structure is characterized in that: the tubing includes at least two tubes; the thermally expansive fireproof sheet is provided with an opening which substantially corresponds to the cross-sectional shape of the tubing in a plane parallel to the surface of the compartment; and the thermally expansive fireproof sheet is fixed to the surface of the compartment by the fixation member such that there is substantially no gap between the tubing and the thermally expansive fireproof sheet.</p> |
