Standards by market

Australia & NZ standards for structural steel, PEB and products

How the NCC, NZBC, AS/NZS 5131 and AS 4100 govern steelwork in Australia and NZ, and how World Steel delivers to CC3 with ISO 3834-2 welding.

Standards: 51
WSC certified: 2
Certifications: 1

Australia and New Zealand regulatory hierarchy: NCC and WHS law in Australia and the NZ Building Code, then AS/NZS 1170 actions, AS 4100 and AS/NZS 4600 design, AS/NZS 5131 fabrication and erection, materials, AS/NZS 1554 welding, AS/NZS 1252 bolting, AS/NZS 2312 and 4680 coatings, and NSSCS, ACRS and SFC certification — The Australian and New Zealand compliance framework for structural steelwork, metal buildings and access steel.

How the Australian system works

In Australia, building work is regulated by the states and territories, which give legal effect to the National Construction Code (NCC) published by the Australian Building Codes Board. Volume One of the NCC covers commercial, industrial and multi-residential buildings. It is a performance-based code: a design complies either by following the Deemed-to-Satisfy provisions, which call up Australian Standards, or through a Performance Solution justified by the designer. For steel buildings the Deemed-to-Satisfy route references the AS/NZS 1170 series for structural actions, AS 4100 for steel structures and AS/NZS 4600 for cold-formed steel. Building approval is granted by a building surveyor or certifier, who relies on the designer's certification and on evidence of compliant construction.

Workplace safety law is a separate, parallel layer. The model Work Health and Safety (WHS) laws, adopted by each jurisdiction, place duties on designers, manufacturers, suppliers and installers of structures and plant. For fixed platforms, walkways, stairways and ladders used in workplaces, AS 1657 is the standard used to demonstrate safe access, while the NCC governs stairs and balustrades in areas used by the public.

Fabrication and erection quality is defined by AS/NZS 5131 Structural steelwork – Fabrication and erection. The designer assigns a Construction Category from CC1 to CC4 based on the importance level of the structure, the service conditions (static or fatigue loading) and the fabrication complexity. The category then sets the welding category, the extent of inspection and testing, tolerances and documentation. AS/NZS 5131 also requires the fabricator to work to an inspection and test plan and to hand over records that demonstrate conformance.

Because the code itself does not name who checks the fabricator, the industry relies on third-party schemes. The National Structural Steelwork Compliance Scheme (NSSCS), administered by Steelwork Compliance Australia (SCA), certifies fabricators to AS/NZS 5131 construction categories and is widely called up in specifications. For the steel itself, ACRS (Australasian Certification Authority for Reinforcing and Structural Steels) provides independent product certification that structural steel conforms to AS/NZS 3678, AS/NZS 3679.1 and AS/NZS 1163.

New Zealand and Papua New Guinea

In New Zealand, building work requires a building consent under the Building Act. The New Zealand Building Code (NZBC) sets performance clauses – including B1 Structure, B2 Durability, D1 Access routes and F4 Safety from falling – which are met through Acceptable Solutions, Verification Methods or alternative solutions. Steel is designed to NZS 3404, with earthquake actions from NZS 1170.5, and fabricated and erected to the joint standard AS/NZS 5131 with welding to AS/NZS 1554. Producer statements are commonly used to record design and construction compliance. Many New Zealand specifications call for fabricators certified under Steel Fabrication Certification (SFC), run by Steel Construction New Zealand; where SFC is required, the certification route is agreed with World Steel for that project.

Projects in Papua New Guinea commonly specify Australian Standards; World Steel applies the same AS/NZS design, fabrication and coating basis unless the contract documents state otherwise. See the market pages for Australia, New Zealand and Papua New Guinea.

AS/NZS 5131 CC3 – how World Steel complies

World Steel is certified to AS/NZS 5131 Construction Category CC3 and holds ISO 3834-2 certification for comprehensive welding quality. CC3 is the category used for structures of higher importance or subject to fatigue loading, so the same system covers the CC2 work that makes up most industrial and commercial buildings. Certificates are supplied with every tender. Our AS/NZS 5131 CC3 guide explains every part of the standard chapter by chapter – from construction categories and welding to inspection and testing – with a checklist for assessing a fabricator.

AS/NZS 5131 construction category matrix combining importance level, service category and fabrication category to give CC1 to CC4 — How the designer selects a Construction Category under AS/NZS 5131.

Design – pre-engineered buildings are designed by World Steel's engineers to AS/NZS 1170, AS 4100 and AS/NZS 4600 (NZS 3404 and NZS 1170.5 in New Zealand), with certification by a locally registered engineer arranged where the project requires it. For structural steel designed by others, World Steel prepares shop drawings and IFC models from the issued drawings.
Materials – plate to AS/NZS 3678, sections to AS/NZS 3679.1, hollow sections to AS/NZS 1163 and coated strip to AS 1397, traceable through mill certificates. ACRS-certified steel is sourced where the specification requires it.
Welding – SAW, FCAW and GMAW to AS/NZS 1554.1 SP or GP category as the construction category requires, under qualified procedures, qualified welders and a nominated welding coordinator.
Coatings – blast cleaning and paint systems selected to AS/NZS 2312.1 for the corrosivity category of the site; hot-dip galvanizing to AS/NZS 4680 by qualified galvanizers.
Inspection and testing – an inspection and test plan for each project, visual inspection of all welds, NDT to the extent set by the construction category, dimensional checks to AS/NZS 5131 tolerances and coating thickness records.

World Steel compliance chain: design, materials, welding, coating, inspection and dossier — The same compliance chain applies to every Australian and New Zealand project.

Steel products and access steelwork

Platforms, walkways, stairs and ladders in workplaces are designed and fabricated to AS 1657; stairs and balustrades in public areas follow the NCC; and accessible routes follow AS 1428.1. Barrier loads come from AS/NZS 1170.1, gratings and covers in trafficked areas are classified under AS 3996, and walking surfaces may need a slip-resistance classification to AS 4586. In New Zealand the same items must satisfy NZBC clauses D1 and F4.

Typical geometric limits for access steelwork (summary – confirm against the current edition)
Item	AS 1657 (workplace)	NCC Volume One (public areas)
Guardrail / barrier height	900–1100 mm, with mid-rail and toeboard where required	At least 1000 mm (865 mm along stairs); openings reject a 125 mm sphere
Stair geometry	20°–45°; riser 130–225 mm; going 215–355 mm	Riser 115–190 mm; going 250–355 mm
Walkway width	At least 600 mm clear	Set by egress requirements
Ladders	Rungs 250–300 mm apart	Service access only

World Steel supplies access platforms and walkways, ball stanchion handrails, grating stair treads and fixed ladders fabricated and documented under the same AS/NZS 5131 system as the primary structure. More detail is in the staircases, ladders and gratings article.

Specifying World Steel in Australian and NZ tenders

State the Construction Category for each part of the work (for example CC2 for the main building, CC3 for crane runways) and the importance level used in design.
Require fabricator certification to AS/NZS 5131 at the specified category, and state whether NSSCS, SFC or ACRS certification is mandatory.
Give the corrosivity category of the site and the required coating system or galvanizing to AS/NZS 4680 with the expected durability.
For access steel, name the governing standard for each area – AS 1657, NCC, AS 1428.1 or NZBC clauses – and the required slip resistance.
List the handover records required (ITP, weld records, material certificates, declaration of compliance).

World Steel's manufacturing and export services, together with the Australia and New Zealand metal building standards article, give more detail. For other markets, compare the US and European frameworks.

World Steel quality dossier contents for Australian projects: ITP, weld records, NDT reports, material certificates, coating reports and declaration of compliance — Documents handed over with each Australian and New Zealand delivery.

World Steel's AS/NZS 5131 certificate is BSI Benchmark BMP 827566 (JAS-ANZ accredited, valid to 31 July 2030) and its EN ISO 3834-2 certificate is Bureau Veritas INY-CER/23/1056 – copies are supplied with every tender.

World Steel certifications

AS/NZS 5131 CC3Certificate BMP 827566BSI Group Australia & New Zealand (Benchmark Product Certification)Valid to 31 Jul 2030

Documents we supply

Project inspection and test plan (ITP) to AS/NZS 5131 and completed inspection records
AS/NZS 1554.1 welding procedure specifications, procedure qualification records and welder qualifications
Material test certificates traceable to heat numbers; ACRS certificates where specified
Visual inspection and NDT reports (ultrasonic, magnetic particle) to the construction category
Galvanizing certificates to AS/NZS 4680 and paint DFT reports to the AS/NZS 2312.1 system
Dimensional inspection reports against AS/NZS 5131 tolerances
Declaration of compliance for the fabricated steelwork
AS/NZS 5131 CC3 and ISO 3834-2 certificate copies
Shop drawings, IFC model and bolt assembly certificates to AS/NZS 1252.1

Markets

Other markets

Australia & New Zealand standards World Steel works to

Search standards

WSC certified World Steel holds a certificate for this standard
Applied by WSC World Steel designs, fabricates or supplies to this standard
Market requirement Required in this market – project-specific, confirm at tender
National regulation Statutory framework the project must comply with

Building codes and regulation

NCC Volume One	National Construction Code – Volume OneGiven legal effect by each state and territory	Regulation
Model WHS Act and Regulations	Work Health and Safety lawsDuties of designers, manufacturers and suppliers	Regulation
NZBC	New Zealand Building CodeUnder the Building Act; building consent required	Regulation
NZBC B1 / B2	Structure; Durability	Regulation
NZBC D1 / F4	Access routes; Safety from fallingStairs, barriers and access	Regulation

Loads and actions

AS/NZS 1170.0	Structural design actions – General principles	Applied by WSC
AS/NZS 1170.1	Structural design actions – Permanent, imposed and other actionsIncluding barrier loads	Applied by WSC
AS/NZS 1170.2	Structural design actions – Wind actions	Applied by WSC
AS/NZS 1170.3	Structural design actions – Snow and ice actions	Applied by WSC
AS 1170.4	Structural design actions – Earthquake actions in Australia	Applied by WSC
NZS 1170.5	Structural design actions – Earthquake actions – New Zealand	Applied by WSC

Structural design

AS 4100	Steel structures	Applied by WSC
NZS 3404	Steel structures standardNew Zealand	Applied by WSC
AS/NZS 4600	Cold-formed steel structuresPurlins, girts and cold-formed members	Applied by WSC
AS 1562.1	Design and installation of sheet roof and wall cladding – MetalMetal roof and wall cladding	Applied by WSC
AS 3600	Concrete structuresFoundations by others	Market requirement
AS 5216	Design of post-installed and cast-in fastenings in concreteAnchors designed by the foundation engineer	Market requirement

Fabrication and erection

AS/NZS 5131	Structural steelwork – Fabrication and erectionCertified to Construction Category CC3	WSC certified →

Materials

AS/NZS 3678	Structural steel – Hot-rolled plates, floorplates and slabs	Applied by WSC
AS/NZS 3679.1	Structural steel – Hot-rolled bars and sections	Applied by WSC
AS/NZS 3679.2	Structural steel – Welded I sections	Applied by WSC
AS/NZS 1163	Cold-formed structural steel hollow sections	Applied by WSC
AS 1397	Continuous hot-dip metallic coated steel sheet and stripPurlins, girts and cladding	Applied by WSC
AS/NZS 1594	Hot-rolled steel flat products	Applied by WSC

Welding and inspection

AS/NZS 1554.1	Structural steel welding – Welding of steel structuresSP and GP weld categories	Applied by WSC
AS/NZS 1554.2	Structural steel welding – Stud welding (steel studs to steel)	Applied by WSC
AS/NZS 1554.5	Structural steel welding – Welding of steel structures subject to high levels of fatigue loadingFatigue-loaded structures where specified	Market requirement
AS/NZS 1554.6	Structural steel welding – Welding stainless steels for structural purposesStainless items where specified	Market requirement
AS 3978	Non-destructive testing – Visual inspection of metal products and components	Applied by WSC
AS 2207	Non-destructive testing – Ultrasonic testing of fusion welded joints in carbon and low alloy steel	Applied by WSC
AS 1171	Non-destructive testing – Magnetic particle testing of ferromagnetic products, components and structures	Applied by WSC
ISO 3834-2	Quality requirements for fusion welding of metallic materials – Comprehensive quality requirements	WSC certified →
ISO 14731	Welding coordination – Tasks and responsibilities	Applied by WSC

Bolting and anchors

AS/NZS 1252.1	High-strength steel fastener assemblies for structural engineering – Bolts, nuts and washers – Technical requirements	Applied by WSC
AS/NZS 1252.2	High-strength steel fastener assemblies – Verification testing for bolt assemblies	Applied by WSC
AS 1214	Hot-dip galvanized coatings on threaded fasteners	Applied by WSC

Corrosion protection

AS 4312	Atmospheric corrosivity zones in AustraliaSite corrosivity category	Applied by WSC
AS/NZS 2312.1	Guide to the protection of structural steel against atmospheric corrosion – Paint coatings	Applied by WSC
AS/NZS 2312.2	Guide to the protection of structural steel against atmospheric corrosion – Hot dip galvanizing	Applied by WSC
AS/NZS 4680	Hot-dip galvanized (zinc) coatings on fabricated ferrous articlesBy qualified galvanizers	Applied by WSC
AS 1627.4	Metal finishing – Preparation and pretreatment of surfaces – Abrasive blast cleaning of steel	Applied by WSC

Steel products and access

AS 1657	Fixed platforms, walkways, stairways and ladders – Design, construction and installationWorkplaces	Applied by WSC
AS 1428.1	Design for access and mobility – General requirements for accessAccessible routes	Market requirement
AS 4586	Slip resistance classification of new pedestrian surface materialsWhere slip resistance is specified	Market requirement
AS 3996	Access covers and gratesClasses A to G	Market requirement
AS 1288	Glass in buildings – Selection and installationGlass balustrades	Market requirement
AS/NZS 2699.3	Built-in components for masonry construction – Lintels and shelf angles (durability requirements)Lintels and shelf angles	Market requirement

Certification and quality

NSSCS	National Structural Steelwork Compliance SchemeAdministered by Steelwork Compliance Australia – confirm per project	Market requirement
ACRS	Australasian Certification Authority for Reinforcing and Structural Steels certificationSteel product certification where specified	Market requirement
SFC	Steel Fabrication Certification (Steel Construction New Zealand)New Zealand – route agreed per project	Market requirement
AS 1530.4	Methods for fire tests on building materials, components and structures – Fire-resistance testsFire-rated elements where specified	Market requirement

Editions and adoption vary by jurisdiction. The project specification and the authority having jurisdiction govern; World Steel confirms the applicable editions at tender.

Frequently asked questions

Who decides the Construction Category under AS/NZS 5131?

The structural designer, based on the importance level, service category and fabrication category. It should be stated on the drawings or in the specification. If it is missing, World Steel raises it at tender stage so that welding, inspection and documentation are priced correctly.

Can World Steel fabricate CC2 work under its CC3 certification?

Yes. World Steel's AS/NZS 5131 system is certified for CC3 and applies the welding category, inspection extent and records required by the category actually specified, whether CC2 or CC3.

Is NSSCS certification mandatory?

Not by the NCC itself. It becomes mandatory when the project specification calls for it. Tell us at tender stage if NSSCS, ACRS or SFC certification is required so the route can be confirmed for the project.

Which standard applies to stairs and platforms in a plant?

AS 1657 for workplace access such as maintenance platforms and plant stairs; the NCC for stairs and balustrades in areas open to the public; AS 1428.1 for accessible routes. In New Zealand the NZBC clauses D1 and F4 apply.

How is corrosion protection selected?

From the corrosivity category of the site (AS 4312 in Australia) and the required life to first maintenance, using the guidance in AS/NZS 2312.1 for paint and AS/NZS 2312.2 for galvanizing. Galvanizing is carried out to AS/NZS 4680 by qualified galvanizers.

Do you design to New Zealand seismic requirements?

Yes. For New Zealand projects frames are designed to NZS 3404 with earthquake actions from NZS 1170.5, and local design review or producer statements are arranged as the building consent requires.