Steel Beam Cost Calculator
Calculate the estimated cost of RSJ, Universal Beams (UB), and Columns (UC) in the UK. Enter your beam size, length, and grade to get an instant material and delivery breakdown.
Steel Beam Estimator
Calculate material, delivery, and fabrication costs
Sizes are Depth × Width × Mass per meter (kg/m). Always confirm dimensions with your structural engineer.
Enter the total length required. Standard mill lengths are up to 16m.
S275 is standard for most domestic projects. S355 is stronger and allows for smaller beam sections.
Black steel is mill-finished. Primer is required for external use or where moisture is present.
Your Estimate
UK structural steel cost breakdown
Select your beam size, length, and grade, then click Calculate to see an estimated cost breakdown.
Structural Steel FAQ
Everything you need to know about buying, specifying, and installing steel beams in the UK.
The cost of a steel beam in the UK typically ranges from £15 to £65 per meter for standard Universal Beams (UB), depending on the size and weight. For example, a small 127x76x13 UB costs around £15/m, while a larger 305x165x46 UB costs around £50/m. Prices exclude VAT, delivery, and fabrication.
RSJ (Rolled Steel Joist) is a legacy term often used interchangeably with Universal Beams (UB). UBs are designed to carry bending loads (used horizontally as beams), while Universal Columns (UC) are designed to carry axial compression loads (used vertically as pillars). UCs have wider, thicker flanges relative to their depth compared to UBs.
S275 and S355 refer to the yield strength of the steel in N/mm² (Megapascals). S275 has a minimum yield strength of 275 N/mm² and is the standard grade for most general construction. S355 has a yield strength of 355 N/mm², making it about 25% stronger, allowing for smaller, lighter beam sections to carry the same load.
Yes. In the UK, any structural alteration involving steel beams (such as removing a load-bearing wall) requires calculations by a qualified structural engineer. They will determine the correct beam size, grade, and connection details to ensure safety and compliance with Building Regulations.
The weight of a steel beam is calculated by multiplying its linear mass (measured in kilograms per meter, kg/m) by its total length in meters. For example, a 203x133x25 UB weighs 25 kg per meter. A 4-meter length would weigh exactly 100 kg (25 kg/m × 4m).
‘Black steel’ refers to standard unpainted structural steel, which has a dark, mill-scaled finish. It is suitable for internal use where it will be boxed in or plastered. Red oxide primer is applied to protect the steel from corrosion during transport and storage, and is required for any steel exposed to external elements or moisture.
Yes, many steel suppliers allow trade and public collections. However, you must ensure your vehicle is suitable for the length and weight of the beam. Beams over 3 meters often require extended load signage, and heavy beams will require a forklift or crane (Hiab) at the collection yard to load them safely.
Steel loses significant strength at high temperatures and can fail in a fire. Under UK Building Regulations, structural steel in domestic properties usually requires 30 to 60 minutes of fire resistance. This is typically achieved by boxing the beam in fire-rated plasterboard or applying intumescent paint that swells when heated.