Spiral rebar

Abstract

The article of the present design, as shown in the reference perspective view showing the state of use, is a spiral reinforcing bar arranged in the concrete pouring space of a joint between a pair of adjacent concrete slabs, and forms a reinforcement structure at the joint together with joint reinforcing bars protruding from the end faces of the concrete slabs on both sides of the joint in the pouring space. As shown in the reference perspective view, the spiral reinforcing bar of the present design has a spiral shape in which multiple unit spiral reinforcing bars, each with a rectangular front view, are connected at a predetermined pitch in the spiral axial direction X by bending a single reinforcing bar. Furthermore, as shown in the reference plan view, the spiral reinforcing bar of the present design has a pair of vertical sides and one horizontal side of the rectangular front view of each unit spiral reinforcing bar, which are arranged on an imaginary base plane, and the other horizontal side is a diagonal connecting bar extending in a direction inclined at a predetermined angle θ in top view relative to the imaginary base plane on which these three sides are arranged, resulting in an inverted Z-spiral shape in top view.

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