What Is the Australian Standard for Steel Framing?

When it comes to building with steel in Australia, compliance isn’t optional — it’s essential.

Light gauge steel framing must meet strict national standards to ensure strength, durability, bushfire resistance, and overall safety. These standards guide everything from the design of steel members to on-site frame installation.

For builders, architects, and homeowners choosing light gauge steel, understanding the governing standards for steel framing in Australia helps ensure your project complies with the National Construction Code (NCC) and is built to last.

The Australian Standards That Apply to Steel Framing

Steel framing in Australia is primarily regulated by the National Construction Code (NCC), which establishes minimum legal requirements for building design and construction.

What Does “Regulated by the NCC” Mean?

The NCC is Australia’s governing building code, ensuring buildings are structurally safe, healthy, durable, energy-efficient, and fire-resistant.

The NCC doesn’t provide all design details; instead, it references a range of Australian Standards that contain the technical requirements. When you comply with these referenced standards, you comply with the NCC.

These include:

In simple terms:


The NCC is the law. The Australian Standards show you how to meet the law.

1. AS/NZS 4600: Cold-Formed Steel Structures (Primary Standard)

AS/NZS 4600:2018 is the core engineering standard for steel framing, particularly light gauge steel used in residential and low-rise buildings.

It governs:
✔ Structural performance of cold-formed members
✔ Load-bearing and non-load-bearing wall systems
✔ Bracing and connection design
✔ Material thickness and strength requirements

Manufacturers such as Australian Steel Framing use this as the main standard.

2. AS 3623: Domestic Metal Framing

This standard covers the manufacturing, fabrication, and installation of metal framing in domestic construction.

It ensures:
✔ Consistent quality
✔ Proper member tolerances
✔ Correct installation practices

Often used in conjunction with AS/NZS 4600.

3. AS/NZS 1170 Series: Structural Design Actions

These loading standards are used by engineers to ensure steel frames withstand applied forces:

  • AS/NZS 1170.0 – General Principles

  • AS/NZS 1170.1 – Permanent and Imposed Loads

  • AS/NZS 1170.2 – Wind Actions

  • AS/NZS 1170.4 – Earthquake Actions

The 1170 series is critical for verifying frames meet NCC structural requirements.

4. AS 4100: Steel Structures

Used for larger-scale or commercial steel structures, this standard covers the design, fabrication, and erection of hot-rolled steel.

5. AS 4055: Wind Loads for Housing

This standard determines the wind classification for houses (N2, N3, C2, etc.) and ensures frames are engineered appropriately.

6. NASH Standard – Residential and Low-Rise Steel Framing

The NASH Standard (by the National Association of Steel-Framed Housing) is widely used in residential steel framing.
It provides:
✔ Design guidance
✔ Construction requirements
✔ Bracing and tie-down details

It is recognised by the NCC as an acceptable construction standard.

7. AS 3959: Construction in Bushfire-Prone Areas

In regional and bushfire-prone zones, steel framing must comply with AS 3959.
Our project at Site 48, Muswellbrook, has a BAL-19 rating, which influenced material selection, cladding, and construction methods.

Material and Fixing Standards

Steel Material Requirements

Steel used for framing must comply with:

  • AS/NZS 1397 – Hot-dip metallic-coated sheet steel

  • AS/NZS 1163 – Cold-formed structural steel

  • Minimum 250 MPa yield stress

Australian Steel Framing uses BlueScope TRUECORE® steel, 0.55–1.2mm in thickness, manufactured to meet these standards.

Fasteners and Connectors

Fasteners must comply with:

  • AS 3566 (Class 3 or higher) — corrosion-resistant screws suitable for structural steel framing.

How These Standards Apply On-Site

On-site construction practices must directly reflect NCC requirements and the relevant Australian Standards. This includes:
✔ Certified engineered footing design
✔ Correctly specified steel wall and roof framing, such as 0.75 light-gauge steel
✔ Insulation levels that meet NCC energy efficiency provisions
✔ Bushfire-compliant detailing for sites within BAL-rated zones

Together, these elements ensure the building meets the structural, safety, and performance requirements mandated by the NCC.

Why These Standards Matter

Building with steel to Australian Standards ensures:

  • Structural safety

  • Long-term durability

  • Resistance to corrosion, termites, wind, and bushfire

  • Faster, more accurate installation

  • Peace of mind that your building meets the law

Conclusion

Australian steel framing standards centre on the NCC and a suite of essential Australian Standards, especially AS/NZS 4600 for cold-formed steel structures. These standards ensure all steel-framed buildings in Australia are safe, strong, and built to withstand our country’s challenging environmental conditions.

At Australian Steel Framing, we manufacture fully engineered, custom-designed steel wall frames, steel roof trusses, and steel flooring systems from genuine BlueScope TRUECORE® Steel, ensuring full compliance with the NCC and all relevant Australian Standards.

Australian Steel Framing designs and manufactures fully engineered light gauge steel framing systems to meet relevant NCC and Australian Standard requirements for each project. Learn more about our light gauge steel framing systems.

We design and fabricate lightweight steel frames and steel trusses made from 0.55mm – 1.2mm Bluescope TRUESCORE® Steel. Steel-framed buildings are lighter, more durable, and more cost-effective to assemble than timber-framed buildings.

Feel free to get in touch if you'd like a quote on a Steel Frame project.

Tips & AdviceMark SavageAS/NZS, AS, NASH, NCC, National Construction Code