Steel Frames
If you have received a quote for a light gauge steel framing project in Australia, you have almost certainly seen the name TRUECORE on the specification. It appears on job sites across Melbourne and Victoria, on product schedules submitted to building surveyors, and in the compliance documentation that accompanies certified steel frame installations.
Despite being so widely referenced, TRUECORE is not well explained in most of the content that surrounds it. Builders and homeowners often know that TRUECORE is a steel product and that it is considered the quality benchmark for light gauge framing in Australia, but the specifics of what it is, how it is made, and why it matters for their project are rarely set out clearly.
This guide answers those questions. It covers what TRUECORE steel is, how it is manufactured, what the certification credentials mean, how it performs in Australian conditions, and why CMC Steel Solutions specifies TRUECORE as standard across every project we deliver.
TRUECORE is a registered brand name for light gauge steel framing products manufactured by BlueScope Steel, Australia’s largest steel producer. The TRUECORE range includes cold-formed steel studs, tracks, noggings, and related framing components used to construct wall frames, roof trusses, floor joists, and facade framing systems for residential, commercial, and industrial buildings.
The core technical characteristic that distinguishes TRUECORE from unbranded or generic light gauge steel is the metallic coating applied to the steel substrate. TRUECORE steel is produced with a continuous hot-dip zinc/aluminium alloy coating to the AZ150 specification, meaning the coating provides 150 grams of metallic coating per square metre of steel surface (75 grams per side). This coating, commonly referred to as Zincalume, gives the steel its corrosion resistance, extends its service life, and underpins its suitability for use in the building envelope and structural framing applications.
The TRUECORE brand also encompasses a quality management system that ensures consistent dimensional tolerances, mechanical properties, and coating integrity across the product range. When a builder or engineer specifies TRUECORE, they are specifying not just a type of steel but a product that is manufactured, tested, and certified to a defined and auditable standard.
TRUECORE steel begins as a coil of high-strength steel strip produced at BlueScope’s steelmaking operations in Australia. The steel strip passes through a continuous hot-dip coating line where it is cleaned, annealed, and then coated with the zinc/aluminium alloy at high temperature. The coating process is tightly controlled to ensure the coating weight, adhesion, and surface quality meet the requirements of Australian Standard AS/NZS 1397, which governs continuous hot-dip metallic coated steel sheet and strip used in construction.
After coating, the steel coils are supplied to roll-forming operations where the flat strip is progressively shaped into the stud, track, and joist profiles used in light gauge steel framing. The roll-forming process uses precision tooling to produce sections with consistent dimensions and section geometry, which is essential for the accuracy of the finished frame and for the reliability of the structural engineering calculations that are based on the section properties.
CMC Steel Solutions sources TRUECORE steel directly from BlueScope-certified supply channels, which means every frame we produce can be traced back to certified coil with documented material properties. This traceability is part of the compliance evidence that supports the Reg 126 certificates issued for our projects.
TRUECORE steel framing products hold CodeMark certification, which is the primary product certification scheme for building products in Australia. CodeMark certification means that the product has been independently assessed against the relevant Australian Standards and that its use in compliant framing systems satisfies the requirements of the National Construction Code.
The specific standards underpinning TRUECORE’s CodeMark certification include the following:
CodeMark certification also means that when a structural engineer or building surveyor asks for evidence that the framing product is compliant, the TRUECORE certificate of conformity is a recognised and accepted form of evidence. This simplifies the documentation process for builders and reduces the risk of compliance queries during building inspections.
Our blog on Australian steel framing standards explained provides a broader overview of how these standards apply to steel framing projects across different building classes.
Australia’s diverse climate creates specific performance demands for building materials that are different from the conditions assumed in many overseas product standards. TRUECORE steel has been developed and tested specifically for the Australian environment, and its performance credentials reflect this.
These performance characteristics are explored in more depth in our guide on steel frame homes in Melbourne: why they are built to last.
Not all light gauge steel framing products are equivalent. The Australian market includes a range of imported and domestically produced steel framing products of varying quality, and builders and homeowners who are not familiar with the differences can find themselves comparing quotes that appear similar on the surface but are based on fundamentally different products.
The key differences between TRUECORE and generic or unbranded alternatives include the following:
Our detailed comparison of the benefits of choosing TRUECORE steel frames for your next project expands on why the TRUECORE specification consistently outperforms alternatives in real-world construction applications.
For builders and developers with sustainability commitments or green building rating targets, TRUECORE steel’s environmental credentials are worth understanding.
TRUECORE steel is produced in Australia from steel that contains a proportion of recycled content. Steel is infinitely recyclable without loss of mechanical properties, which means that at the end of the building’s life, the steel framing can be recovered and reprocessed into new steel products with no degradation in quality.
The precision of factory fabrication using TRUECORE steel produces very little waste compared to site-cut materials. Frame components are cut to exact lengths at the manufacturing facility, and offcuts are minimal and collected for recycling. This contributes to a lower embodied waste figure for the framing package compared to site-built alternatives.
For projects targeting Green Star, NABERS, or similar sustainability credentials, the recyclability and low-waste production of TRUECORE steel framing can contribute positively to the materials category of the rating assessment.
TRUECORE steel is not an option or an upgrade at CMC Steel Solutions. It is the standard specification for every light gauge steel framing project we design and deliver, from single-storey residential homes to multi-storey commercial buildings, childcare centres, industrial facilities, and facade framing systems.
This means that when you receive a quote from CMC, the frames included in that quote are designed, engineered, and certified around the known and documented properties of TRUECORE steel. The structural calculations reference TRUECORE section properties. The Reg 126 certificate is issued against a TRUECORE-specified frame. The CodeMark compliance documentation is available as part of the standard project handover package.
There is no substitution of lower-grade products to reduce cost, and no ambiguity about what has been installed. Every CMC project is a TRUECORE project.
For a full picture of how TRUECORE steel framing performs in residential construction, our guide on light gauge steel framing in Melbourne is the ideal starting point.
Is TRUECORE steel more expensive than timber framing? TRUECORE steel framing typically carries a higher materials cost than standard timber framing on a per-square-metre basis. However, the total project cost comparison changes significantly when you account for faster installation, reduced labour, lower long-term maintenance, and the elimination of remediation costs associated with timber movement and termite damage over the building’s life.
Can TRUECORE steel be used in all climate zones in Australia? TRUECORE steel with AZ150 coating is suitable for use across most climate zones and exposure categories in Australia, including humid tropical, temperate, and arid environments. For marine environments within close proximity to the ocean, additional protective measures may be required and should be confirmed with the engineer and the TRUECORE product technical documentation.
Does TRUECORE steel come with a warranty? BlueScope provides product performance warranties for TRUECORE steel used in certified applications. The warranty terms relate to the coating performance of the base material. Contact CMC Steel Solutions or BlueScope directly for specific warranty information applicable to your project type and location.
Is TRUECORE suitable for use in external wall cavities and wet areas? TRUECORE steel’s AZ150 coating provides corrosion resistance suitable for use in external wall cavities, provided the cavity is designed to prevent the pooling or entrapment of water. For wet area applications such as bathroom walls, additional waterproofing treatments to the lining system are required as they would be with any framing material.
CMC Steel Solutions builds every project with certified TRUECORE steel as standard. Our framing packages include full CodeMark compliance documentation, Reg 126 structural certification, and traceability back to BlueScope-certified coil, giving you and your building surveyor the evidence you need at every stage of the approval and inspection process.
Contact us on 1300 285 566 or email info@cmcsteelsolutions.com.au to discuss your project and request an obligation-free quote that includes full TRUECORE specification as standard.
Are you looking for steel framing solutions? We at CMC Steel Solutions offer wide range of products for construction projects.
Connect with our team at 1300 285 566 or email us your doubts on info@cmcsteelsolutions.com.au for better response.
