Ribbed concrete reinforcing steel as well as process for its production

摘要

The invention relates to a ribbed concrete reinforcing steel, which is characterised in that at least two, preferably three longitudinal channels (3), running parallel to the longitudinal axis (2), are impressed into it with a lateral distance from one another and the regions between neighbouring longitudinal channels (3) are forced outwards in a bead-like manner and impressed in the beads are preferably embossed transverse grooves (6) and/or transverse ribs (7). The invention also relates to a process for producing a ribbed concrete reinforcing steel which is characterised in that the longitudinal channels are impressed, and in that the material between neighbouring longitudinal channels is forced outwards beyond the circumferential surface of the starting material, so that longitudinal beads cross-sectionally in the form of arc sections are formed. <IMAGE>