FIREPROOF INSTRUMENT FOR LONG BODY PENETRATION HOLE

摘要

PROBLEM TO BE SOLVED: To provide a fireproof instrument for a long body penetration hole which surely and effectively improves concrete adhesive power generated between the instrument and the inner periphery of the long body penetration hole.

SOLUTION: An annular frame 1 is attached to a long body penetration hole A formed on the floor board S in such a manner that the annular frame covers the inner periphery of the hole by concrete adhesive power generated between the frame and the inner periphery of the long body penetration hole A. The annular frame has receive and support pieces 2 for receiving and supporting fireproof filling materials 4 in an annular space between the outer periphery of the inserted long body P and the inner periphery 1a of the annular frame 1 and assist and adhesive pieces 3 that generate concrete adhesive power between themselves and the periphery of an opening of the long body penetration hole A located on the lower surface S1 of the floor board S.

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