RSJ Design • UK-wide
We provide fixed-fee RSJ design and steel beam calculations for wall removals, extensions and loft conversions across much of the UK. Every project is handled by an experienced structural engineer and delivered as a clear, Building Control-ready pack your builder can use on site.
RSJ design, steel beam calculations and wider structural calculations for UK homeowners, builders and architects.
Domestic RSJ design and structural calculations across busy UK cities and their surrounding towns and villages.
We work on RSJ design and steel beam calculations in many busy areas, including:
If you live in or around any of these cities, we can usually help with RSJ design, steel beam calculations and wider structural calculations. We also support nearby towns and villages, not just city centre postcodes.
Focused on the types of structural work UK homeowners, architects and builders deal with most often.
Steel beams for removing internal walls between kitchen, dining and lounge spaces in houses and flats.
RSJs and support steel for single and two storey extensions, bi-fold openings and corner glazing.
Structural calculations for loft conversions and dormers, including ridge beams, floor beams and cranked steel where headroom is tight.
Steel beams and brackets when chimney breasts are removed on one or more floors while keeping the stack safe above.
When loads cannot sit on existing walls we design SHS posts, padstones and small frames that work with your layout.
Structural checks for existing beams or altered layouts where records are missing or lenders ask for confirmation.
Clear steps from first enquiry through to finished RSJ design and structural calculations.
Send photos, rough sizes and any drawings or sketches you have. A short call can help confirm the layout and anything that is not clear from the images.
You receive a clear fixed fee and scope for the RSJ design and structural calculations before any work starts, so you know what is included and when you will receive the pack.
A structural engineer designs the beams, checks loads and deflection and prepares the calculation pack, including padstones, posts and supporting walls where needed.
You receive drawings and structural calculations that your builder and Building Control officer can use straight away. We can respond directly if your inspector has questions.
Comments from homeowners and builders using our RSJ design and structural calculation services in different cities.
We opened up the wall between our kitchen and dining room and needed RSJ design and calculations for Building Control. The beam size, padstones and notes were all laid out clearly and the inspector passed it first time.
Our builder wanted proper steel beam calculations before ordering anything. The drawings showed exactly where the RSJ should sit, how to support it and what padstones to use. It made the job on site much easier.
We were converting the loft and needed cranked beams and a ridge beam. The engineer worked from the architect plans and photos and made sure the RSJs would fit between the existing walls. The pack was easy to follow.
We bought a house where some walls had already been removed and there were no records for the steel. The structural calculations checked what was in place and gave us a clear report for the mortgage lender.
Quick answers on RSJ design, steel beam calculations and structural calculations for UK projects.
Probably, yes. If you are within reach of one of the main cities listed above, we can usually help. Send your postcode and a short note about the project and we will confirm if we can take it on.
For straightforward wall removals and small domestic RSJ design jobs, we usually aim for 24–72 hours once we have clear drawings, photos and measurements. Larger extensions or full loft conversion packs often take around five to seven working days.
Yes. Our structural calculations follow current UK design standards and are laid out in a way Building Control officers are used to seeing. If your inspector raises any queries, we can respond directly and clarify the design.
We need the property address and postcode, a short description of the work, good quality photos and basic sizes of the wall or opening. If you have architect drawings, estate agent plans or sketches, send those as well and we will use them as the base for the RSJ design.
For simple RSJ design jobs, clear photos and hand-measured sizes are often enough. For more involved work such as larger extensions or full loft conversions, drawings usually save time and reduce the risk of missed details.
Fees are based on the type of project, the number of beams or frames to be designed and how complex the existing structure and load paths are. You always receive a fixed fee and scope in writing before we start any RSJ design or structural calculations.
Use this form to outline your project. Your message goes straight to an engineer, not a call centre.
Share a few details so we can review the layout and confirm the right RSJ design and structural calculations for your project.
This form connects to our central SECalcs email. You will receive a reply from a structural engineer, usually within one working day.
If you are planning a wall removal, extension, loft conversion or need structural calculations for steel beams in any of our UK coverage areas, send us a few details. Your enquiry goes straight to an engineer.
