| 摘要 |
PROBLEM TO BE SOLVED: To further improve the fireproof performance.SOLUTION: Attachment protruding pieces 21 are integrally provided on a front end wall 14 of a box body 12, and fireproof putty P1, P2 is provided on the front end wall 14. Then, the fireproof box 11 is attached to a wall material W1 by the attachment protruding pieces 21 and the entire fireproof box 11 is pressed against the wall material W1, thereby causing the fireproof putty P1, P2 to closely contact with a rear surface of the wall material W1 so as to cover areas around through holes Wa from the rear side of a wall W. |
