Waiting box for use in prefabricated concrete element utilized to construct building, has bottom part comprising recesses in planar areas, where recesses locally provide greater thickness to box to allow bending of ends of concrete bars

摘要

The box (1) has a bottom part (2) crossed by ends (9a, 9b) of concrete bars, where the ends are folded against the bottom part. The bottom part includes planar areas (4) opposite to the ends. The bottom part includes recesses (6) in each of the areas, in which the bottom part of box is crossed by the ends of the concrete bars. The recesses locally provide greater thickness to the box to allow bending of the ends. Each planar area has a bead (7) forming relief and positioned approximately at mid length of a concrete bar folded against the plane area bearing the bead.