Our story
Fifty-plus years of the same discipline
How a machinery development business became a steel fabricator, without giving up the engineering.
About Tri-Dev
About Tri-Dev — steel fabricators since 1968
Formed by three engineers in 1968. Still designing, fabricating, testing and installing from one works, for customers the length of the country.
Established 1968 · CE and UKCA marked
How we work
Drawn, made, proved and fitted by the same firm
Every design is produced electronically in AutoCAD, in-house, in either 2D or 3D, and discussed with you as it progresses. Nothing goes to fabrication until the drawing is agreed.
Fabrication is carried out at our own works to your specification and in accordance with the latest regulations and British Standards. Final products are tested and trial-erected in-house as required before they ever reach site.
Our own team then delivers and installs the finished steelwork, anywhere in the UK. There is no handover between a fabricator and a fitter, because they are the same people.
What you get
Three things that do not change, whatever the job
In-house CAD, 25+ years
Electronic drawings in AutoCAD, refined with you before any steel is cut.
Tested and trial-erected
Products are proved at the works as required, so site time is fitting rather than fixing.
Accredited and marked
CHAS accredited, CSCS carded, and CE and UKCA marking on the work.
Accredited
Checked, carded and marked
The paperwork a main contractor asks for before anyone sets foot on site.
CE and UKCA marking, CHAS accreditation and CSCS cards for every employee and sub-contractor on site.
Health & Safety
Safety, monitored every day
We promote the importance of Health and Safety at our works and on site — not an afterthought, a daily discipline.
- CSCS accreditation for every employee and sub-contractor on site
- Workshop and site supervisors monitor safety daily to keep risk to a minimum
Services
What we make
Five lines, one works, one team from first drawing to finished install.
Structural Steel
Fire escapes, staircases, walkways, mezzanine floors, bridges and framework, engineered in-house. Read moreBalustrades & Handrails
Bespoke made balustrades, handrails and glass railings, including a dedicated Q-railing service. Read moreBespoke Fabrication
Custom metalwork built to your exact specification, from concept through to finished product. Read moreWelding
MIG, TIG, MMA and Q-railing welding, delivered by our expert welders. Read moreDelivery & Install
Our own team delivers and installs finished steelwork on site, anywhere in the UK. Read moreNationwide
Steelwork that travels
We are a single-works fabricator that installs the length of the country. That combination is the whole proposition — one team accountable from the first drawing to the last fixing.
Made in one place
Every job is drawn, cut, welded and trial-erected at the same works. There is no second fabricator in the chain and no variation in who did the work.
Delivered by us
Our own transport and our own team, so the steel arrives with people who know how it was built and what it has to meet on site.
Proved before it ships
Assemblies are tested and trial-erected in-house as required. On a job three hundred miles away, that is the difference between a fitting day and a return visit.
Distance changes the planning, not the standard. How we work on national jobs.
FAQs
About Tri-Dev — your questions
Can’t find what you’re after? Get in touch and we’ll help.
How long has Tri-Dev been established?
Since 1968, when three engineers formed the business to carry out development work on machinery, predominantly for the pottery industry.
What industries have you worked in?
Pottery, automotive, mining, steel production and textiles, and for many years now the building sector.
Is the work done in-house?
Yes. Design in AutoCAD, fabrication, testing and trial-erection all happen at our own works, and delivery and installation are carried out by our own team.
Are your staff accredited?
All our employees and sub-contractors hold CSCS accreditation, we are CHAS accredited, and our work carries CE and UKCA marking.
Talk it through
Come and see the works
You are welcome to visit during working hours — call Craig first so the right person is free when you arrive.