Building Regulations and Steel Fabrication – Here’s What You Need to Know
27 January 2026
When commissioning structural steelwork in the UK, you’ll need to fully understand all the relevant building regulations to ensure your project runs smoothly and meets legal requirements.
If you're planning a mezzanine floor, portal frame building, or structural framework, you’ll need to be able to navigate the regulations. This guide breaks down what you need to know about compliance for steel fabrication projects.
Understanding the Building Regulations Framework for Structural Steelwork
The Building Regulations 2010 govern most of the construction work carried out in England and Wales, establishing minimum standards for design, construction, and alterations to buildings. For steel fabrication projects, three ‘Approved Documents’ are the most relevant:Â
- Part A (Structure) ensures your steelwork can safely support anticipated loads
- Part B (Fire Safety) addresses fire resistance and means of escape
- Part L (Conservation of Fuel and Power) covers thermal efficiency, where steel forms part of the building.
Building control approval is required for most structural steelwork installations, particularly when steel forms part of the primary structure or involves significant alterations. This includes steel-framed buildings, structural beams supporting floors or roofs, and load-bearing modifications to existing structures.
However, some minor works may fall under permitted development rights. In Scotland, the Building Standards apply differently, administered through local authority verifiers, whilst Northern Ireland operates under separate Building Regulations (Northern Ireland) 2000. If your project spans different UK nations, ensure you understand the specific requirements for each jurisdiction.
Structural Design Standards: BS EN 1993 and Your Responsibilities
The standard BS EN 1993-1-1 is part of the Eurocode system and sets out the design requirements for structural steel throughout the UK, governing how steel structures must be calculated for strength, stability, and serviceability. Here, it’s important to understand who is responsible for what.
Structural engineers design the steelwork and produce calculations demonstrating compliance with BS EN 1993; fabricators manufacture components according to approved drawings and specifications; whilst clients must appoint competent professionals and ensure designs are submitted to building control.
The structural calculations will be extremely important to your building control submission. They demonstrate that the proposed steelwork meets safety standards and must be prepared by a qualified structural engineer. Building control will review these calculations before approving your project, so it’s wise to engage your engineer early on in the planning process.
You should be aware that fabricators can advise on practical aspects of steelwork, but they cannot typically provide the structural design and calculations unless they employ chartered structural engineers.
Fire Resistance Requirements for Steel Structures
Unprotected structural steel loses strength rapidly when exposed to fire, making fire protection critical for most applications. Approved Document B specifies the required fire resistance periods, which are based on building height, use, and occupancy. For example, a single-storey warehouse could require to have 30 minutes of fire resistance, whilst a multi-storey residential building might require an hour to 90 minutes or longer.
Three main fire protection methods are available:
- Intumescent coatings expand when heated to insulate steel and are ideal for exposed steelwork where aesthetics matter
- Board protection systems use fire-resistant boards fixed around steel members, offering excellent protection for hidden steelwork
- Concrete encasement fully surrounds steel in concrete, providing robust protection but adding considerable weight.
Your choice depends on the required fire resistance period, whether steelwork will be visible, budget constraints, and architectural considerations. Some external steelwork or structures with low fire risk may not require protection at all.
CE Marking, UKCA Marking, and Factory Production Control
Structural steel components must carry conformity marking showing that they meet essential safety and performance standards. Following Brexit, the UK introduced UKCA marking, though CE marking remains accepted for a transitional period. Reputable fabricators like Buy a Beam are qualified and certificated, proving we have robust quality management systems that ensure consistent product standards.
So when selecting a fabricator, you should request evidence of their FPC certification and conformity marking compliance. Documentation should include Declarations of Performance confirming products meet relevant standards, FPC certificates from notified bodies, and material test certificates for the steel used. These documents prove your steelwork meets regulatory requirements and will be needed for Building Control approval.
Common Compliance Pitfalls and How to Avoid Them
Unfortunately, there are some projects that suffer delays because of avoidable compliance issues. For example, inadequate design documentation is all too common. As such, you should ensure structural drawings and calculations are complete before fabrication begins. Missing or late structural calculations can halt your project, so it’s a good idea to commission your structural engineer early.
If you find that the fire protection specifications are unclear or you think they may be incorrect, you should confirm requirements with building control at the design stage. Many clients also forget to notify building control at key stages, resulting in costly delays.
To avoid any or all of these pitfalls, follow this checklist:
- Appoint a chartered structural engineer early on in the process
- Submit structural calculations to building control before fabrication
- Confirm fire protection requirements in writing
- Verify your fabricator holds the current FPC certification
- Notify building control at required stages; and retain all compliance documentation, including test certificates
Taking these steps ensures your steel fabrication project proceeds smoothly from conception to completion whilst meeting all regulatory requirements.
Order Steel Online Today
If you require help choosing the right steel products for your project, using Buy A Beam is a fantastic way to achieve peace of mind. We make it easier to buy steel online than ever by connecting you through our online store to highly skilled steel fabrication companies that deliver an order directly to your construction site.
Whatever type of structural steel beam, channel or section that you require, Buy A Beam is here to help.