Nuclear Steelwork Fabricator

FLI is a Fit 4 Nuclear certified steelwork fabricator, approved to BS EN 1090, Execution Class 4. FLI work on specialist steelwork packages for Nuclear New Build Projects, that require repeatable steel components, in high volume for rollout work packages. Bespoke secondary steelwork packages for walkways, platforms, access ramps, ladders, and stairs are also available. FLI’s design & detailing teams are used to formalise outline designs from concept to fully detailed, fabrication ready solutions. Our Project Management and Quality Teams have Nuclear projects experience and understand the delivery requirements of Class 1 Nuclear Projects.

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nuclear fabrication doorframes

FLI’s scope on nuclear sites has included  platforms, door frames, brackets and towers, demonstrating the depth of FLI’s experience. This has followed on from extensive work over decades in energy, telecoms, aviation, rail, defence and highways markets, where FLI has developed excellent safety and quality standards. These projects have included call-off contracts for electrification structures or safety critical communications towers in rail, to radar towers in defence.

communications tower hinkley point

FLI workshop factory

FLI has excellent in-house facilities including two workshops totalling 6000sqm, offices for project management, design and detailing offices plus a packing, despatch and a storage facility, all to the south of
Gloucester, less than an hour from the Hinkley site.


FLI operates automated fabrication systems, including a saw and beam line, an angle line, a tube line and a plate line as well as presses up to 300T and a 6 axis welding robot and rotator system.

FLI new beam line

FLI’s welders are qualified to BS EN 9606-1 2017. Processes include Submerged Arc, MIG,MMA and stud welding. All procedures are to BS EN ISO 15614-1 2019 and certified up to Execution Class 4.

FLI robot welder

company information FLI Structures

FLI has been engineering and fabricating steel structures for over 70 years. The company is financially stable with no borrowings and employs highly skilled, experienced and long serving staff. With no borrowings and appropriate working capital, FLI is free to concentrate on delivering a high quality product and an excellent project management service, as required by a nuclear site.

grillage platform


This culture is reflected in our approach to health and safety as well as quality standards. We are proud of our ROSPA Gold award as well as our F4N rating.

nuclear steel fabrication by francis lewis international