| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem wherein a structure known as a fireproof structure of a penetrating part of cable wiring is executed by filling a fire resistant filler such as rock wool around a cable that penetrates the inside of an opening of a floor, arranging fire resistant partition plates made of calcium silicate plates on the upper and lower sides of a fireproof partition body, then fixing the upper and lower fire resistant partition plates to the fireproof partition body using anchor bolts and filling fire resistant putty in a clearance between the cable and the fire resistant partition plates to carry out sealing, but construction by this method requires time and labor to remove the existing fire resistant partition plates for the extension and change of the cable when extending and changing the cable. <P>SOLUTION: A support hardware is provided at the end of a skeleton cross section outside flange duct having the same inside dimensions as opening hole inner wall dimensions. A fire resistant plate subjected to cable penetration notch treatment is laid on the support hardware, and fire resistant blocks are filled in a clearance between the opening inner wall and a cable. <P>COPYRIGHT: (C)2012,JPO&INPIT |
