Skip to main content Skip to search Skip to primary navigation Skip to secondary navigation

Introduction of Grade 500E

The joint Standard AS/NZS 4671:2001 Steel Reinforcing Materials was published in 2001 and introduced Grade 500E reinforcing steel to replace Grade 430.

As Grade 500E became more widely used, some 'failures' were reported on sites and concern about the new material grew among members of the building industry, especially design engineers. In 2003 the University of Auckland reported a failure of Grade 500E reinforcing in a laboratory test and this crystallised these concerns.

Top

This information is published by the Ministry of Business, Innovation and Employment’s Chief Executive. It is a general guide only and, if used, does not relieve any person of the obligation to consider any matter to which the information relates according to the circumstances of the particular case. Expert advice may be required in specific circumstances. Where this information relates to assisting people:

with compliance with the Building Act, it is published under section 175 of the Building Act
with a Weathertight Services claim, it is published under section 12 of the Weathertight Homes Resolution Services Act 2006.

Print

Print this page (recommended)

Print entire guidance document