Following on from other projects within the same development in Seaton, West Cumbria, we were appointed to fabricate and install the structural steelwork for another substantial self-build property.
This build was a large residential home requiring a carefully designed steel framework to create open internal spaces while supporting the roof structure efficiently.
Steel A-Frames with Ridge Beams Design
Unlike a full portal frame system, this project used steel A-frames seated onto wall tops, combined with a central ridge beam to carry roof loads across the span of the property.
This structural approach allowed for:
- Wide, open-plan internal layouts
- Reduced need for internal load-bearing walls
- Strong roof support across a large footprint
- Clean, modern roof geometry
Positioning the A-frames on the wall tops required precise fabrication and installation to ensure correct load transfer down into the supporting structure.
Fabricated In-House at Our Silloth Workshop
All steelwork for this Seaton self-build was fabricated in-house at J Johnstone Engineering.
Our team produced:
- Structural A-frame sections
- Ridge beam system
- Associated connection plates and bolt assemblies
Manufacturing in our Cumbria workshop ensures full quality control and consistency before steel ever reaches site.
For larger homes like this, accuracy in fabrication is essential — particularly when working with roof geometry and long spans.
Installation on Site in Seaton
Once delivered to site, our team installed the steel framework in accordance with the structural engineer’s drawings.
The process involved:
- Accurate positioning of wall-top A-frames
- Installation of the ridge beam
- Bolted connections for structural integrity
- Close coordination with other trades on site
Large residential self-builds demand careful sequencing to keep projects moving efficiently — something we’re well accustomed to across West Cumbria.
Supporting Self Builds Across West Cumbria
Seaton continues to see high-quality self-build developments, and structural steel plays a key role in enabling modern layouts and architectural flexibility.
From A-frame systems and ridge beams to multi-beam floor support structures, we provide structural steel fabrication and installation across:
- Seaton
- Workington
- Whitehaven
- Cockermouth
- Carlisle
- The wider West Cumbria and Lake District region
With nearly four decades of experience, J Johnstone Engineering supports homeowners, builders and developers with reliable, in-house fabricated steelwork tailored to each project.
Structural Steel for Large Self Builds in Cumbria If you’re planning a large residential build in West Cumbria or the Lake District and require structural steel A-frames, ridge beams or full portal frame systems, our team can support your project from fabrication through to on-site installation.
Related Structural Steel Projects in Cumbria
J Johnstone Engineering regularly fabricate and install structural steelwork across Cumbria and the Lake District. Recent projects include:
• Structural steel installation for a large new build property in Lanercost, Cumbria
• Structural steel A-frames installed in Silloth, Cumbria
• Structural steel for the conversion of a former railway station in Mealsgate, Cumbria
If you would like to discuss a project or Request a Quote, feel free to get in touch.
