| 摘要 |
<p>The box has a square bottom (2) provided with connections (16, 17) whose ends (18, 19) extend in overhang from the bottom. The connections are mounted in parallel to each other. The ends are adapted to form free ends (22, 23) of portions (20, 21) of the connections in a concrete during casting a slab. Each connection is maintained on an outer side (26) of the bottom directed towards an outside of the box by insertion in notches (24) placed in a side of the bottom. The notches are configured to ensure maintenance of the connections by a wedging process. The notches have a V configuration.</p> |
