AS NZS 4671:2019 pdf free.Steel for the reinforcement of concrete.
7.3.4 Coilsize
The mass and dimensions of the coils are subject to agreement at the time of order.
7.4 Surface geometry
7.4.1 General
The deformed steel bars and coils covered by this Standard shall be characterized by surface geometry. The geometry of ribs or indentations shall conform to Clauses 7.4.2.1, 7.4.2.2 and 7.4.2.3. For deformed reinforcement, achievement of the required bond with concrete shall be demonstrated by conformance to Clause 7.4.2.4 or by a bond test in accordance with Clause CA.
Reinforcing steel not conforming to this Clause shall be treated as plain round bar. NOTE Geometry of indented bar in accordance with Clause 7.4.2 does not imply similar high bond performance to ribbed bars in accordance with Clause 7.4.2.
7.4.2 Geometry of ribs and indentations
7.4.2.1 General
The reinforcing steel shall have two or more rows of parallel transverse ribs or indentations equally distributed around the circumference and with a uniform spacing along the entire length excepting identifying markings. For ribbed bars, longitudinal ribs may or may not be present.
Methods for determining the geometry of ribs and indentations are provided in Clause C.3.
7.4.2.2 Transverse ribs or indentations
The projection of the transverse ribs of a bar cross section shall extend over 75 % or more of the circumference, calculated from the nominal diameter.
The angle (13) of rib or indentation inclination to the axis of the bar shall be not less than 45°. Where the angle is greater than 45° and is less than 700, then longitudinal ribs in accordance with Clause 7.4.2.3, shall be present and/or at least one row of ribs or indentations shall be in the reverse direction to the other rows (see Figure 7.2).
The rib flank inclination (a) shall be not less than 45° and the ribs shall be radiused at the transition to the core of the product (see Figure 7.3).
The longitudinal spacing (c) of the ribs shall be between O.5d to 1.Od and the rib height (h) shall be
O.05d to O.lOd (see Figures 7.2 and 73). The crest width of ribs (we) shall be not greater than O.3c (see Figure 73).AS NZS 4671 pdf download.