Curved, Cranked & Cellular Steelwork
Rolled curves, cranked members and cellular beams for structures that ask for more than a straight section. We detail, fabricate and install to BS EN 1090 Execution Class 2.

















Steel that does not run in straight lines.
Not every structure is made of straight, solid beams. Curved rafters, cranked columns, cellular and castellated beams and other shaped members are used where the architecture or the services demand them, whether that is a curved roof, a raked frame or a beam that has to let ductwork pass through it. We fabricate curved, cranked and cellular steelwork to your engineer's and architect's design under BS EN 1090 Execution Class 2, and install it with our own teams, so the specialist steel that gives a building its shape is made and fitted by one firm.
Shaped steel, made to your geometry.
Curved, cranked and cellular members for structures that ask for more than a straight beam.
Curved steelwork
Beams and sections rolled to a radius for curved roofs, canopies and feature structures.
Cranked and raked members
Cranked columns and raked beams for pitched, angled and stepped frames.
Cellular and castellated beams
Beams fabricated with openings to reduce weight and let services pass through, for long, clean spans.
Feature and exposed steel
Shaped members finished for architecturally exposed structures, where the steel is on show.
Connections for shaped steel
The connections that shaped members need, detailed and fabricated to the same standard as the steel.
The steel that gives a building its shape, made to fit.
Curved, cranked and cellular members are where fabrication skill shows. We roll, shape and weld to your engineer's and architect's geometry under BS EN 1090 Execution Class 2, then install with our own teams, so shaped steel arrives accurate and ready to erect.
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Project & sample images.
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Why shaped steel is a fabricator's job.
Curves, cranks and cellular beams show the skill in the workshop.
About UIS-
01
Rolling and shaping in-house
We roll, crank and fabricate shaped members to your geometry, so curves and cranks are made to one standard alongside the rest of your steel.
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02
Coded welding for cellular beams
Cellular and castellated fabrication is welded by coded welders to BS EN ISO 9606, with the records to match.
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03
BS EN 1090 Execution Class 2, UKCA marked
Fabricated to the execution class your engineer's design is specified against, with the declaration of performance.
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04
Detail, fabricate and install as one
Shaped steel is detailed, made and fitted by one firm, so the geometry that leaves the workshop is the geometry that goes up.
"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."
Questions clients ask us.
Yes. We roll beams and sections to a radius for curved roofs, canopies and feature structures, to your engineer's and architect's geometry.
They are beams fabricated with openings through the web, which reduces weight and lets services pass through the beam. They suit long, clean spans where a solid beam would be heavier and deeper.
Yes. We fabricate and finish curved and cranked members for architecturally exposed steelwork, where the steel is on show and the finish matters.
BS EN 1090 Execution Class 2, UKCA marked, welded by coded welders to BS EN ISO 9606, with the declaration of performance.
We are based in South Yorkshire and design, fabricate and install across the UK with our own teams.
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