What this class covers
ANZSIC class 3224 classifies businesses specialising in structural steel erection services across Australia. This classification applies to contractors who focus specifically on the on-site fabrication and assembly of structural steel components rather than complete construction projects. These businesses work with engineered steel elements that form the primary support systems for various structures, requiring specialised skills in reading engineering drawings, precision fitting, and heavy lifting operations.
Typical operations in this class include specialist firms that erect steel frameworks for commercial and industrial buildings, contractors who install bridge superstructures and girders, companies specialising in transmission tower construction, businesses that assemble large metal storage tanks and silos for agricultural or industrial use, and specialists in reinforcing steel installation for major concrete structures. These operations are typically subcontractors to main construction firms rather than prime contractors for complete projects.
Primary activities in plain English
Businesses in this classification typically engage in:
- Erecting structural steel frameworks for buildings and industrial facilities
- Installing and assembling large metal storage tanks and silos
- Placing and securing reinforcing steel (rebar) for concrete structures
- Assembling steel trusses, joists, and support systems
- Performing on-site welding specifically for construction projects
- Installing structural components for bridges, cranes, and transmission towers
These activities involve specialised trade skills including crane operation, rigging, bolting, and welding, often working from engineering specifications rather than architectural plans.
Exclusions and nearby codes
This classification has important boundaries with related construction activities:
Businesses that construct complete buildings incorporating structural steel components fall under Subdivision 30: Building Construction rather than this specialised class. Similarly, contractors responsible for complete engineering structures such as bridges, towers, or refinery plants are classified in Subdivision 31: Heavy and Civil Engineering Construction.
The distinction lies in whether the business focuses specifically on steel erection as a specialised service (3224) or undertakes the complete construction project (Subdivision 30 or 31). Many businesses in this class operate as subcontractors to main construction contractors.
Practical guidance
For business registration purposes, this classification corresponds to Business Industry Code (BIC) 32240 when completing tax returns and business activity statements. Businesses typically need an ABN and must register for GST if annual turnover exceeds $75,000.
Workers' compensation classifications vary by state but generally fall under construction-related categories with higher premium rates due to the high-risk nature of steel erection work. Specific licences may be required for high-risk work including dogging, rigging, and scaffolding operations.
When applying for business loans, grants, or tenders, accurately using this classification helps identify your business as a specialised trade service rather than a general constructor. Industry associations such as the Australian Steel Institute provide additional resources and standards relevant to this sector.