Steel Fabrication and the UK's Net Zero Target
31 August 2025
Legislative Framework and its Industry Impact
The UK became the first major economy to pass net zero emissions legislation in June 2019, amending the Climate Change Act 2008 to require all greenhouse gas emissions to reach net zero by 2050. This legislation has changed how the construction industry approaches project delivery, particularly affecting the steel fabrication sector.
The Government has targeted a 95% reduction in emissions from steelmaking by 2050, while the Climate Change Committee has recommended that emissions from ore-based steelmaking be near zero by 2035. Manufacturing and construction emissions need to be reduced by 70% by 2035 compared with 2018 levels, representing one of the most ambitious decarbonisation programmes in the world.
The regulatory framework includes several key standards. PAS 2080 provides the methodology for carbon management in infrastructure projects, establishing requirements for measuring, managing, and reducing carbon emissions throughout the project lifecycle, and BREEAM assessments now incorporate embodied carbon considerations.
The New Requirements and Challenges For UK Construction Projects
The net-zero target affects the planning and execution of construction projects. As such, projects must now demonstrate compliance through mandatory carbon assessments, shifting from traditional cost-focused decision-making to whole-life carbon considerations. This affects every stage from design through to end-of-life disposal.
Project timelines now need to accommodate additional phases for carbon assessment and supply chain verification processes. Additionally, design teams need to have knowledge of lifecycle assessment and carbon modelling, whilst procurement processes increasingly weigh carbon performance alongside traditional cost and quality criteria.
Embodied Carbon in Steel: Measurement, Reduction Strategies, and Alternative Solutions
The structure makes up a large proportion of the overall embodied carbon impact of buildings, typically 60% of the impact of a multi-storey building. This means that understanding and reducing embodied carbon in steel components is crucial for meeting net-zero targets.
Carbon measurement follows established methodologies using life cycle assessment principles. This includes emissions from raw material extraction, steel production, fabrication, transportation and installation. The assessment typically covers modules A1-A5 under the EN 15978 standard, encompassing product, transport and construction process stages. The standardisation of components reduces fabrication waste whilst enabling economies of scale in low-carbon production.
As a result, there has been an increased use of recycled steel content and hybrid structural systems that combine steel with timber or engineered materials. However, these approaches require careful consideration of performance requirements and compliance with building regulations.
Optimising the Steel Supply Chain: Transportation, Fabrication, and Installation for Net Zero
Reducing emissions across the steel supply chain will need action from material producers through to installation contractors. Transportation is a significant component of embodied carbon, making local sourcing strategies crucial for project carbon performance.
Regional steel production and fabrication facilities reduce transport distances and associated emissions. This supports UK steel fabricators, such as Buy a Beam, while improving supply chain resilience. However, local sourcing must balance carbon benefits against material quality, cost and availability considerations.
Energy-efficient fabrication processes reduce operational emissions from steel cutting, welding and finishing operations. Investment in renewable energy systems for fabrication facilities, as well as the implementation of improved process efficiency and waste heat recovery systems, all contribute to reducing carbon emissions.
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