Written by Scott Traynor, Director at Kelly Steel structural steel fabricators based in Dandenong, Melbourne. Kelly Steel fabricates for agricultural, transport, and industrial energy projects across Victoria.
Industrial fabrication is not a one-size-fits-all service. The steel going into a grain storage silo on a Victorian farm has different requirements to the steel going into a rail bridge in Sydney, and both are completely different again from the structural steel framing of a solar farm in regional Queensland.
Same base material. Same core processes: cutting, drilling, welding, coating. But the grades, standards, tolerances, coatings, and compliance documentation vary significantly depending on the industry the steel is going into and the conditions it must perform under.
Here is a clear breakdown of how industrial fabrication differs across three of Australia’s major industrial sectors: agriculture, transport, and energy.
What makes steel fabrication requirements sector-specific?
Industrial steel fabrication is the process of cutting, shaping, welding and finishing raw steel into structural components and assemblies for industrial applications. The steel industry supplies construction, mining, energy, transport and agriculture, making it a backbone of the national economy with demand driven by infrastructure projects, industrial facilities and renewable energy installations.
What sets industrial fabrication apart from standard commercial work is the operating environment. Industrial steel is exposed to heavier loads, harsher conditions, more demanding compliance regimes, and in many cases, remote or difficult locations. The fabrication approach has to account for all of that before a single weld is laid.
Agriculture: Durability, Corrosion Resistance and Rural Conditions
Agricultural steel fabrication covers a wide range of structures: machinery sheds, hay storage, livestock shelters, workshop buildings, equipment frames, and critically, grain storage infrastructure including silos and conveyors.
The primary challenge in agricultural industrial fabrication is the environment. Rural Australia is hard on steel UV exposure, humidity, temperature variation, chemical exposure from fertilisers and fumigants, and the physical stress of heavy machinery all demand material and coating choices that go beyond what a standard commercial build requires.
Grain storage is a particular focus. Grain silos in Australia must be designed and built to Australian Standard AS 2628, which requires them to be gas-tight and sealable for fumigation meaning the fabrication has to achieve a level of joint integrity that is not required in most structural steel applications. Galvanised construction and heavy-duty structural profiles are standard, with ladders and platforms conforming to Australian Standards.
For machinery sheds and rural buildings, hot-dip galvanising after fabrication is the most common corrosion protection method. Portal frame structures with wide clear spans are the preferred design, allowing large agricultural equipment to move freely inside. Agricultural buildings must be engineered to withstand environmental loads including high winds, heavy rainfall and intense sun all of which vary significantly across Australian regions.
The other key characteristic of agricultural industrial fabrication is its remoteness. Fabricated components often travel significant distances to site. Sequencing, packaging, and ease of erection by small crews matter more than on a metropolitan build with a large workforce and crane access.
Kelly Steel fabricates structural steel for agricultural projects across Victoria, see our agricultural steel fabrication work for examples.
Transport: Fatigue Loading, Tight Tolerances and Strict Compliance
Transport infrastructure is one of the most demanding environments for industrial fabrication in Australia. Steel bridges, rail structures, gantries, overhead sign frames, pedestrian overpasses, and road barriers all require fabrication that meets a significantly higher compliance bar than most other sectors.
The difference comes down to fatigue loading. Transport structures are subject to repeated, dynamic loads from moving vehicles and trains over decades of service life. A steel weld that performs adequately under static load may fail over time under cyclic loading which is why welding for transport infrastructure is governed by a specific and more demanding standard.
Welding for steel bridges in Australia is carried out to AS/NZS 1554.5, which covers structural steel welding for structures subject to high levels of fatigue loading. This is a higher requirement than the standard AS/NZS 1554.1 used in most commercial fabrication, and it comes with stricter requirements for welder qualification, inspection, and non-destructive testing (NDT).
The Austroads Technical Specification ATS 5410 sets out the requirements for the construction of steelwork for bridges and gantries, with fabrication and erection carried out in accordance with AS/NZS 5131. For rail-specific applications, additional requirements from the Australian Rail Track Corporation and Transport for NSW apply on top of the base standards.
The documentation requirements for transport fabrication are also substantially greater. All mill certificates, supplier declarations of conformity, test certificates, structural steel verification testing, traceability, fastener test certificates, and coating certificates must be supplied with hold points and witness points built into the quality plan throughout fabrication.
Kelly Steel has experience in transport infrastructure fabrication, working to AS/NZS 5131 and project-specific quality documentation requirements, see our industrial transport steel fabrication work.
Energy: Scale, Exposure and the Renewables Boom
The energy sector represents one of the fastest-growing areas of industrial steel fabrication demand in Australia right now. With the Federal Government targeting 82% of electricity from renewables by 2030, more than 400,000 tonnes of steel will be required each year through to 2030 to service over 28 GW of renewable energy generation projects.
The scale of steel demand in this sector is significant. Each megawatt of onshore wind requires 124 tonnes of steel, while solar installations need about 45 tonnes per MW. Every 1,000 km of transmission infrastructure requires 2,500 towers, each made from 30 tonnes of steel.
Steel fabrication for the energy sector spans several distinct application types, each with different requirements:
Solar farms
need structural steel for panel mounting systems, tracker frames, cable management infrastructure, and substation structures. The steel is typically lighter section, high-volume, and must be designed for long service life in outdoor exposure which means protective coatings are critical, particularly in coastal or high-UV zones.
Wind energy
requires heavy structural steel for turbine bases, nacelle components, tower sections, and the access platforms and ladders that run the height of each turbine. Fatigue loading is again a key consideration turbine structures experience constant cyclic loading through their operational life, which drives similar welding and inspection requirements to transport infrastructure.
Transmission infrastructure
The towers and substations connecting generation to the grid use fabricated steel sections that must withstand wind loading, conductor tension, and in some cases seismic or cyclonic loads depending on location.
Oil, gas, and conventional power
continue to require fabricated pressure vessels, pipe supports, platforms, and structural steel for plant and process applications where material traceability, weld procedure qualification, and post-weld heat treatment requirements are often stricter than standard structural work.
The remote location of many energy projects, wind and solar farms, predominantly in regional Australia creates similar logistical challenges to agricultural fabrication. Components need to be fabricated to a high degree of completion before they leave the workshop, because remedial work on a remote site is expensive and slow.
The Federal Government has invested $500 million through the Future Made in Australia Innovation Fund to expand fabrication capacity and support onshore manufacturing for wind towers and other clean energy components.
What this means for fabrication: corrosion-resistant coatings for long-term outdoor exposure, fatigue-rated welding for wind structures, full material traceability for pressure-rated work, and logistical planning for remote delivery and installation.
The Common Thread Across All Three Sectors
The process of industrial fabrication cutting, drilling, welding, coating is consistent. What changes is the specification driving it.
Every sector has its own compliance framework. Agriculture leans on AS 2628 for silo work and AS 4100 for structural frames. Transport works to AS/NZS 5131, AS/NZS 1554.5, and Austroads or principal contractor specifications. Energy applies AS/NZS 1554.1 for standard structural work and AS/NZS 1554.5 where fatigue loading applies, with additional requirements for pressure equipment and process plant.
Choosing a fabricator with demonstrated experience in your sector matters. The standards, the documentation, the welding procedures, and the inspection requirements differ enough that a company set up purely for commercial building work may not have the certifications or quality systems a major industrial project requires.
Working on an agricultural, transport, or energy steel project?
Kelly Steel provides industrial fabrication services for projects across Victoria, from farm infrastructure and grain storage through to transport gantries, bridge steelwork, and energy plant structures. We work from engineer’s drawings, hold fabrication accreditation, and manage design, fabrication, and installation in-house.
• Agricultural steel: sheds, silos, rural buildings, equipment platforms → see agricultural steel fabrication
• Transport infrastructure: bridges, gantries, rail structures, compliance-ready fabrication → see industrial transport steel
• Industrial and energy: platforms, supports, structural framing, full project delivery → see industrial fabrication services
Frequently Asked Questions
What is industrial steel fabrication?
Industrial steel fabrication is the process of cutting, welding, bending and finishing raw steel into structural components for industrial use including agriculture, transport, energy, mining and infrastructure. It differs from commercial fabrication mainly in the compliance standards, operating environments and documentation each sector requires.
How does industrial fabrication differ across sectors?
The core processes are the same. What changes is the specification. Agricultural work prioritises corrosion resistance in harsh rural conditions. Transport infrastructure requires fatigue-rated welding and non-destructive testing. Energy sector fabrication demands large-scale outdoor durability and, for wind structures, cyclic load resistance.
What Australian standards apply to industrial steel fabrication?
The primary standards are AS 4100, AS/NZS 5131 and AS/NZS 1554. Transport work applies the more demanding AS/NZS 1554.5 for fatigue-loaded structures. Agricultural silo fabrication must comply with AS 2628. Energy and process plant work may also require AS 1210 and AS 4041 for pressure equipment.
Why does a fabricator's sector experience matter?
Each sector has different welding procedures, inspection hold points, QA documentation and certification requirements. A fabricator with the right accreditations and sector track record can produce the documentation a superintendent or principal contractor will accept without rework or delays.
How much steel does Australia's energy sector use?
Australia’s renewable energy sector requires more than 400,000 tonnes of steel annually through 2030. Each megawatt of onshore wind requires 124 tonnes of steel, while solar installations need approximately 45 tonnes per megawatt.
What coatings are used in industrial steel fabrication?
Hot-dip galvanising is standard for agricultural and outdoor transport structures. Duplex systems galvanising plus paint are used in high-corrosion environments. Energy and industrial applications typically specify paint systems to AS/NZS 2312. Stainless steel is specified where painting isn’t suitable.
Can one fabricator work across multiple industrial sectors?
Yes provided they hold the right certifications for each. That means current welding qualifications across the relevant AS/NZS 1554 parts, ISO-certified quality management systems, and the ability to produce sector-specific compliance documentation on demand.
Working on an industrial project across agriculture, transport or energy?
Contact the Kelly Steel team or request a quote based in Dandenong South, delivering across Victoria, NSW and Tasmania.
