New Zealand Standards pertaining to reinforced concrete will undergo revisions/amendments from time to time. This page provides links and a summary to the updated revisions or amendments. 

All Standards are available for purchase from the Standards NZ website www.standards.co.nz 

Information contained on this page is current as of July 2016.

Reinforcing Bar, Wire, and Fabric

With the introduction of the joint Australia New Zealand Standard AS/NZS 4671:2001, and an overlap period of 12 months, these Standards were withdrawn in April 2002 (NZS 3402, NZS 3421, NZS 3422).

AS/NZS 4671 Steel Reinforcing Materials

AS/NZS 4671, published on 2 April 2001, is the current joint Standard, covering reinforcing steel in the form of bar, wire and machine welded mesh. It is one of the many Standards that the Australian and New Zealand governments agreed to combine under the CER agreement to free up trade between the two countries. However, due to the different design codes between Australia and New Zealand, different properties of reinforcing steel are usually required in each country. The performance difference is in the ductility required for seismic design in New Zealand.
This joint Standard was initially based on the European reinforcing Standard ENV 10080 as a performance-based Standard. Previous Standards have been much more prescriptive. This means that the Standard now focuses on the final properties of the steel, rather than what is in the steel or how to make it. The most important change from a specifier's perspective was the introduction of three classes of ductility.

  • L - Low ductility; applying to cold drawn products.
  • N - Normal ductility; the reinforcing class for non-seismic areas, this product is commonly used in Australia.
  • E - Earthquake ductility; the reinforcing class for seismic areas principally used in New Zealand. 

Other significant developments from the previous reinforcing Standard were:

  •  Replacement of grade 430 MPa steel with grade 500 MPa steel with effectively no reduction of the minimum ductility requirement.
  •  The reinforcing steel classes are based on ductility
  •  Unique identification marks required to identify the grade and class of reinforcing and the steel producer.
  • Steel producers and steel processors are required to meet the characteristic value bands for the strength properties specified. To meet these stringent requirements a producer's process needs to be maintained under close control ensuring statistically consistent physical properties
NZS 3101 Design of Concrete Structures

 The Concrete Structures Standard, NZS 3101: 2006 has been updated to permit the design of reinforced concrete structures using reinforcing steel as per the steel Standard AS/NZS 4671, which was published in March 2006.

AS/NZS 1554.3 Welding of Reinforcing Steel

AS/NZS 1554.3 has been written with the Grade 500 reinforcing steel in mind, to cover the requirements for welding reinforcing steel going into concrete structures designed and constructed in accordance with AS 3600 or NZS 3101.1. The Standard sets out prequalified weld preparations, methods for the qualification of welding procedures and welding personnel, workmanship and inspection requirements. This Standard also applies to the welding of steel connection devices, inserts, anchors and prefabricated assemblies in the fabrication shop and in the field
The Standard was revised in 2014.