AS/NZS 4671:2019 pdf download.Steel for the reinforcement of concrete.
5.3 Designation of bar and coil
Each of the reinforcing steels described in ClauseS.1 shall be designated by distinguishing letters or numbers in the following manner:
(a) Profile — By the letters, R, D, or I, representing plain Round, 1eformed ribbed, or deformed Indented surfaces respectively.
(b) Strength grade — By the numerical value of the specified lower characteristic yield stress, expressed in MPa.
(c) Ductility class — By the letters L, N or E, representing Low, t.{ormal or Earthquake (seismic) ductility respectively.
(d) Size — By the numerical value of the assigned diameter, expressed in mm.
The designators shall be stated In the order of profile, strength grade, ductility class and size.
Full designators shall be used in all communications unless the use of abbreviated forms causes no ambiguity, and the omitted characteristics can be readily distinguished or deduced.
EXAMPLE A deformed ribbed bar, of grade 500 MPa normal ductility reinforcing steel with an assigned 16 mm diameter, would be designated as D500N16.
However, if all the reinforcement ordered or required for a particular project was to be deformed ribbed bars of the same strength grade but varied in other characteristics, and there was a general note to this effect in the project plans and specifications, the designation may be abbreviated to ‘N 16’.
5.4 Designation of welded mesh
Welded mesh shall be designated by distinguishing letters or numbers in the following manner:
(a) Profile — By the letters, R, D, or I, representing plain Round, Ieformed ribbed, or deformed Indented, surfaces respectively.
(b) Strength grade — By the numerical value of the specified lower characteristic yield stress expressed in MPa.
(c) Configuration of the orthogonal bars — By the letters S or R, representing Square or Rectangular configurations.
(d) Ductility Class — By the letters L, N or E representing Low, Normal or Earthquake (seismic) ductility respectively, in accordance with Table 7.2(A) and Table 7.2(B).
(e) Size — By the numerical value of the assigned bar diameter in the longitudinal direction, expressed in mm.
(f) Transverse spacing of the longitudinal reinforcing steel — By the numerical value of the transverse spacing, expressed in mm, divided by 100.
(g) Transverse reinforcement for rectangular configured welded mesh — By the numerical value of the assigned bar diameter, expressed in mm. Transverse reinforcement shall be of the same shape, strength grade and ductility class as the longitudinal reinforcing steel. Unless noted otherwise, transverse reinforcement is usually spaced at 200 mm centres.
The designators shall he stated in the order shape, strength, configuration, ductility, size, spacing and secondary reinforcement if applicable.
Full designators shall be used in all communications unless the use of abbreviated forms causes no ambiguity, and the omitted characteristics can be readily distinguished or deduced.
EXAMPLE A square mesh with an assigned diameter of 9 mm deformed ribbed bar at 200 mm centres, of grade 500 MPa low ductility reinforcing steel, would be designated as “D500SL92.AS/NZS 4671 pdf download.