What is an RSJ? Steel beams explained for homeowners
RSJ, UB, UC, PFC, flitch beam — what the terms mean, which steel beam is used where, and what an RSJ costs supplied and fitted in 2026.
Service
Steel installation for builders & developers
We work as the structural subcontractor for builders, developers, kitchen fitters and loft conversion companies across Cheshire and the North West — supplying and fitting steel to your engineer's drawings, or fitting steel you have ordered, to your programme.
The crew arrives with props, needles and lifting equipment, installs the steel and leaves the opening ready for your team.
What’s included
- Fit-only or supply-and-fit
- Temporary works and propping
- Goalposts, ridge beams and loft steels
- Risk assessments and method statements for each job
- Booked around your programme
- Residential and light commercial
Worth knowing before you book anyone
What we need from you
The engineer's drawings and calculations, the building control reference, and clear access on the day. We check the steel against the specification before it goes in.
Steel installs for builders: your questions answered
Can you fit steel we have already ordered?
Yes, provided it matches the engineer's specification and the drawings are available on site.
Do you take on commercial structural work?
Yes — shops, offices and light commercial units as well as residential projects.
Related guides
How long does a steel beam installation take, start to finish?
Timeline for a steel beam installation: survey to engineer's calcs to approval to install day. What happens when, and what can stretch the programme.
Where we do this
Steel installs for builders across Knutsford, Wilmslow, Macclesfield, Altrincham, Sale, Stockport, Didsbury & South Manchester, Stretford & Urmston, Warrington, Northwich, Chester, Crewe & Nantwich, Congleton.
Need steel installs for builders?
Send photos or your engineer's drawings for a same-day budget price, or book a free survey.