Abstract: A spiral rebar weldable metal rod with a constant or variable pitch of between 1 and 10 times a diameter of a cylinder into which the rod is inscribed; with a planar cross-section having at least two petals connected to the central section and separated from each other by gaps. The triangular petals are connected with the central section by their vertices; the petal edges distant from the central section are circular. The rebar has ribs; the ribs' height is between 0.5 mm and 1.0 mm and distances between the ribs are between 5 mm and 15 mm.

Abstract: Disclosed a reinforcement structure for reinforced concrete and methods for manufacturing thereof. In one aspect, the reinforcement structure includes a rod comprising a spiral strip having a pitch between 1.0 and 10.0 times a width of the strip and a ratio of thickness of the strip to the width of the strip in a range of 1:4 to 1:10. The surface of the spiral strip may be entirely or partially corrugated with ribs of arbitrary shape and having height in a range of 0.05% to 0.30% of the thickness of the strip. In another aspect, method for manufacturing a reinforcement structure comprises flattening a wire rod into a flat strip, corrugating it with ribs, and twisting the ribbed strip into a spiral of the specified pitch.

Abstract: Disclosed a reinforcement structure for reinforced concrete and methods for manufacturing thereof. In one aspect, the reinforcement structure includes a rod comprising a spiral strip having a pitch between 1.0 and 10.0 times a width of the strip and a ratio of thickness of the strip to the width of the strip in a range of 1:4 to 1:10. The surface of the spiral strip may be entirely or partially corrugated with ribs of arbitrary shape and having height in a range of 0.05% to 0.30% of the thickness of the strip. In another aspect, method for manufacturing a reinforcement structure comprises flattening a wire rod into a flat strip, corrugating it with ribs, and twisting the ribbed strip into a spiral of the specified pitch.