| 摘要 |
PROBLEM TO BE SOLVED: To provide a fire-protection measure structure of an outlet box with superior fire protection properties such that even after the outlet box is fitted, construction for fire-protection measures and inspection can be easily carried out without depending upon an internal state of a through hole.SOLUTION: There is provided a fire-protection measure structure of an outlet box installed on a wall with a through hole to cover the through hole. The outlet box has a space surrounded with a back plate and a side face plate joined to an outer periphery of the back plate, and installed on the wall with an opening part side of the outlet box directed to the wall side. There is a gap between the wall and the outlet box, an electric wire cable etc., is inserted into an insertion hole formed in at least one of the back plate and side face plate of the outlet box, and a bent thermally expandable fire-resistant sheet is inserted into the through hole of the wall. |
