Menu

Structural Steelwork in Cardiff.

Cardiff builds across three fronts - the city centre and Bay commercial schemes, the industrial estates east toward St Mellons, and the dockside at Barry. Structural steel carries all three, and we design, fabricate and install each frame with our own directly employed teams.

30 +
Years Trading
1,200 +
Projects Delivered
UK
Wide Coverage
- Cardiff A family firm Structural Steelwork
Fully accredited and independently assessed
Accredited

Accredited for design, fabrication and installation, with the paperwork to prove it.

  • BS EN 1090 Execution Class 2, UKCA marked: the execution class your engineer's design legally has to be fabricated to.
  • Coded welders, BS EN ISO 9606: every structural weld made by an approval-tested welder, traceable on the documentation.
  • ISO 9001 quality management: a quality system audited end to end, not a badge on a footer.
  • CHAS Elite, SafeContractor & ConstructionLine Gold: the pre-qualification pack your procurement team lifts straight into a PQQ.
  • GBP 10m public and GBP 10m employers liability: published figures, because your procurement team needs them on file.
  • Directly employed, CSCS-carded site teams: the people on your site are ours, not subcontracted, so one team owns the result.
Accredited for design, fabrication and installation, with the paperwork to prove it.
30+ Years, since 1994 In-house team
How it works

Your structural steelwork from brief to installed, in four stages.

01

Survey & quote

A free site visit anywhere in Cardiff. Drawings, access and specifications logged. Same-day quote on small domestic structural steelwork enquiries; 1-2 weeks on large commercial tenders with a full take-off.

02

Design & fabricate

Detailed, fabricated and finished in our own workshop under BS EN 1090 Execution Class 2. QA pack, mill certs and traceability documentation ready before delivery.

03

Deliver & coordinate

We schedule delivery to your Cardiff site on our own transport, around your access windows and site programme, not third-party haulage timetables.

04

Install on site

Directly employed CSCS-carded crew with their own MEWPs. Full RAMS pack, as-built drawings and 12-month defect liability at handover.

What structural steelwork means at UIS

Specialist capabilities, fabricated in-house.

01

Full structural package - primary and secondary

UB and UC primary frames, bracing, columns, purlins and rails, edge protection, plant decks, stair cores, and mezzanine steelwork. Fabricated to BS

02

In-house lift planning

Lifting plans are written in-house, by someone who knows how things actually work on the ground - the same team who planned

03

Tekla, BIM, and 3D-scan on retrofit

Tekla modelling, BIM coordination at LOD 300+, FEA where specified, and 3D site scanning on retrofit packages - the mezzanine floor at

04

Sector breadth on record

Tier-1 commercial, live retail refurbishment, live leisure, research and laboratory, and reclaimed structural steel.

Why UIS

What we bring to every project.

The same standards, capacity and accountability on every job, wherever the site.

  • 100+ Tonnes fabricated each month
  • 30+ Years in business (est. 1994)
  • BS EN 1090 Execution Class 2, UKCA marked
  • GBP 10m Public and employers liability cover
  • 12-month Defect liability on every install
  • In-house Directly-employed CSCS crews, no subcontracting
Where we work

Areas we cover around Cardiff.

Tap a postcode for a quick note on the area plus a map. We cover the wider region and install UK-wide, tell us your postcode.

CF10

City Centre and Cardiff Bay

CF10 covers the commercial city centre and the Cardiff Bay waterfront, both steady sources of office, civic and leisure building. We fabricate the primary frames for these schemes and install the internal staircases and access steel that complete the fit-out.

Open in Google Maps →
Examples

Recent structural steelwork work.

← Drag / swipe to browse · click to expand →

Client reviews
Sir Robert McAlpine logo

"I've worked with UIS for several years on some high profile and very complex projects. Their attitude and work ethic are second to none - providing high quality services and products which are delivered safely and on time every time. Overall they are a pleasure to do business with and wouldn't hesitate recommending UIS for any steelwork or metalwork packages."

Stuart Bale
Sir Robert McAlpine
Start to finish

One team, from drawing to installed.

Cardiff is covered as part of our work across Wales, run as a single source from first drawing to final bolt. Our own employed teams design, fabricate and install, with no subcontracting in between. Steel is detailed and fabricated at our South Yorkshire workshop, then delivered and erected by our crews, certified to BS EN 1090 Execution Class 2 and made at around 100 tonnes a month.

Start your quote
Common questions

FAQs

Yes. We fabricate and install structural steel throughout Cardiff and across Wales, covering CF10 and CF11 in the centre, CF14 and CF24, CF3 to the east and CF63 around Barry. Steel is delivered from our South Yorkshire workshop and erected by our own teams.

After we have drawings and a confirmed tonnage, we set out a fabrication and installation programme and hold to it. Keeping design, fabrication and erection in one company means we are not reliant on third-party fabricators, so we can commit to dates with confidence.

Our steel is fabricated to BS EN 1090 Execution Class 2 and UKCA marked, under an ISO 9001 quality system. We are also assessed under CHAS Elite, SafeContractor and ConstructionLine Gold, giving Cardiff main contractors the safety and quality records they need at tender and on site.

No. Both fabrication and installation are carried out by our own employed teams, never handed to outside firms. For your Cardiff project that means the crew erecting the steel already knows how it was detailed and made, and one company answers for the result.

Yes. We survey access first and plan deliveries and lifts around it, whether the site is an open plot near CF63 or a tight CF10 city-centre position. Sequencing steel to match the room for cranes and vehicles keeps erection safe and on programme.

Across Wales

We work right across Wales.

See our full structural steelwork coverage across Wales, or jump to a nearby area below.

Our base

Based in Rotherham. Delivering across Cardiff.

We work from our own fabrication facility in Rotherham, South Yorkshire, and deliver and install across Cardiff and the UK with our own teams and transport, one accountable team from enquiry to handover.