Key Issues

Industry Directory

ASI Groups

Standards and design

Standards and the regulatory framework

Back to top

The ASI’s key program for ensuring compliance rests on the regulatory framework provided among others by the Building Code of Australia and the relevant Australian standards. AS 4100 Steel structures and AS/NZS 4600 Cold-formed steel structures rely on guaranteed values for chemical composition, mechanical properties, tolerances on dimensions, method of manufacture and quality control provisions for all material used in a steel structure and are based on the building blocks of material standards like AS/NZS 1163, AS/NZS 1397, AS/NZS 3678 and AS/NZS 3679 which have been calibrated based on known Australian steels, testing statistics and work practices.

The new AS/NZS 5131 Structural steelwork – Fabrication and erection

Back to top

What is it?

The new Australian Standard AS/NZS 5131 defines good practice for fabrication and erection of structural steelwork for projects in Australia, and is the basis for the new National Structural Steelwork Compliance Scheme(NSSCS).

Download information brochure (PDF) (200 Kb)
Read Standards Australia media release (PDF)

AS/NZS 5131 addresses:

  • Requirements for documentation and specification
  • Materials, including steel, welding consumables, fasteners and grout
  • Preparation and assembly, including cutting, shaping and holing
  • Welding, including welding processes and qualification of welding procedures and personnel
  • Mechanical fastening (bolting, tensioning of bolts, special fasteners, post-fixed anchors)
  • Surface treatment and corrosion protection
  • Architecturally exposed structural steelwork
  • Erection
  • Geometrical tolerances
  • Inspection, testing and correction
  • Site modifications and repair of existing structures

AS/NZS 5131 utilises a risk-based fit-for-purpose approach implemented through the classification of the ‘Construction Categories’ for the whole or parts of the structure. This establishes a Quality Benchmark responsive to the needs of your project and client.

AS/NZS 5131 applies to all types of buildings, general structures, crane runway girders, monorails, roadway bridges, railway bridges and pedestrian bridges. Its application includes complete structures, individual members and manufactured components prefabricated for inclusion in a steel structure and subject to seismic actions or to fatigue.

Why was it created?

Prior to the publication of AS/NZS 5131, Australia was the only country in the developed world without a dedicated stand-alone Standard for fabrication and erection of structural steelwork. In today’s increasingly ‘open borders’ procurement environment, where structural steelwork for Australian projects is being supplied by both local and overseas based fabricators, a rigorous and transparent definition of good quality is more necessary than ever. AS/NZS 5131 sets the quality benchmark Australia expects to ensure safe structures.

AS/NZS 5131 in the project process

Fitting AS/NZS 5131 into your project process is easy:

For engineers

For fabricators and erectors

For builders

Material and design standards

Back to top

Material and welding standards:

Are you getting the bolts you specifed?AS/NZS 1163 Cold-formed structural steel hollow sections
AS/NZS 1252 High strength steel bolts with associated nuts and washers for structural engineering
AS/NZS 1397 Continuous hot-dip metallic coated steel sheet and strip - Coatings of zinc and zinc alloyed with aluminium and magnesium
AS/NZS 1554 Structural steel welding
AS/NZS 3678 Structural steel. Hot-rolled plates, floorplates and slabs
AS/NZS 3679.1 Structural steel. Hot rolled bars and sections
AS/NZS 3679.2 Structural steel. Welded I sections

Design standards:

AS 4100 Steel structures
AS/NZS 4600 Cold-formed steel structures

Guidance on material compliance from AS 4100:

Clause 2.2.2 Acceptance of steel
Certified mill test reports, or test certificates issued by the mill, shall constitute sufficient evidence of compliance with the Standards referred to in this Standard.

Clause 2.2.3 Unidentified steel
If unidentified steel is used, it shall be free from surface imperfections, and shall be used only where the particular physical properties of the steel and its weldability will not adversely affect the strength and serviceability of the structure. Unless a full test in accordance with AS 1391 is made, the yield stress of the steel used in design (f subscript y) shall be taken as not exceeding 170 MPa, and the tensile strength used in design (f subscript u) shall be taken as not exceeding 300 MPa.

Guidance on material compliance from AS/NZS 4600:

1.5.1.5 Acceptance of steels
Certified mill test reports, or test certificates issued by the mill, shall constitute sufficient evidence of compliance with the Standards referred to in this Standard.

1.5.1.6 Unidentified steel
If unidentified steel is used, it shall be free from surface imperfections and shall be used only where the particular physical properties of the steel and its weldability will not adversely affect the design capacities and serviceability of the structure. Unless a full test in accordance with AS 1391 is made, the yield stress of the steel used in design (fy) shall be 170 MPa or less, and the tensile strength used in design (fy) shall be 300 MPa or less.