What steel beams are used for loft conversions?
Most loft conversions use RSJ beams (Rolled Steel Joists), along with Universal Beams (UB) and sometimes Universal Columns (UC), depending on the structural design.

MAH Steel - Services
Steel beams are a key structural part of any loft conversion, supporting new floors and maintaining the integrity of the property. At MAH Steel, we are structural steel fabricators suppling steel beams for loft conversions across Kent, London, and the South East, with a focus on accuracy, fast turnaround, and practical delivery.
If you’re converting a loft, the steel needs to be fabricated correctly and delivered in a way that works for the site. Many properties have limited access, which can make installation difficult without proper planning. We supply loft conversion steel beams that are designed not just to meet structural requirements, but to be installed efficiently on site.
Our range of loft conversion steel beams includes:
All steel is fabricated to your structural engineer’s drawings, ensuring compliance and a precise fit. This reduces delays during installation and helps keep loft conversion projects on schedule.

We also provide HIAB and crane-assisted delivery. This allows steel beams to be lifted directly into position, which is often necessary for loft conversions in London and other built-up areas where access is restricted. Our focus is on delivering the right steel, on time, and ready to install.
For situations where beams are too large to move through the property, we can fabricate splice joints. These allow the steel to be delivered in sections and bolted together on site, making installation much more practical in loft spaces.
If you need steel beams for a loft conversion, contact MAH Steel to discuss your requirements.
Steel is widely used in loft conversion projects to create strong, lightweight structural support while maximising available space. This section covers common questions about incorporating steel into loft conversions, including design requirements, structural integration, installation methods, and how steel solutions help achieve safe and efficient roof space transformations.
See all our FAQsMost loft conversions use RSJ beams (Rolled Steel Joists), along with Universal Beams (UB) and sometimes Universal Columns (UC), depending on the structural design.
Steel beams are typically lifted into place using crane or HIAB delivery. In tight spaces, splice joints allow them to be assembled on site.
Yes, steel beams can be delivered using specialist lifting equipment or supplied in sections for easier installation in confined spaces.
From residential steel beams to large commercial packages, our team can provide fast, reliable pricing and advice.