| 摘要 |
PURPOSE:To simplify installation and fixing, and to eliminate the need for repair at the time of direct finishing of ceiling by forming a through-hole for a piping to the top face of a cylindrical body, mounting the central lower side section of a recessed fixture onto the surface of the cylindrical body and engaging both end tensile sections of the fixture to slab. CONSTITUTION:A box 1 for wirings is made of steel, and shaped in a cylindrical body, a top face of which is closed, and two through-holes for pipings are formed to the top face. The size of the box 1 for the wirings is shaped in an extent that a clearance is to some extent formed to the mounting hole 4 of a PC slab board 3, and the box 1 is shaped so that the underside of the box 1 is positioned at a slightly upper section from the underside of the PC slab board 3 under the state in which the box is set up to the PC slab board 3. To install the box 1 for the wirings, the mounting hole 4 is made in a ceiling section at a stage when the PC slab board 3 is manufactured, the PC slab board 3 is built, and the box 1 for the wirings is inserted into the mounting hole 4 from an upper section. Accordingly, the mounting operation of the box 1 for the wirings with a fixture can be conducted efficiently. |
