Domestic RSJ projects
1,200+ beams designed
From simple knock-throughs to wide goalpost frames across London.
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RSJ Design • London
RSJ Design Structural Engineer in London
We specialise in RSJ design London for wall removals, knock-throughs and extensions across Greater London. Building Control-ready steel beam calculations with fixed-fee design and a typical turnaround of 24 to 72 hours once we have your information.
- Chartered structural engineers designing RSJs every day in London.
- Full calculation pack ready for Building Control and your builder.
- Optimised steel sizes for safe, efficient and cost-effective beams.
Serving North, South, East and West London including Camden, Islington, Hackney, Ealing, Croydon, Richmond and surrounding areas.
Turnaround
24–72 hours
For most domestic RSJ designs once drawings and measurements arrive.
Chartered oversight
CEng MIStructE / MICE
Every design completed or checked by a Chartered Structural Engineer.
RSJ design London steel beam services
Focused on the real projects London homeowners, builders and architects carry out every week.
Wall removals
RSJ beams for open plan layouts
Beams and bearings for kitchen knock-throughs, lounge openings and new doorways in houses and flats.
- Single RSJ over new opening
- Linked beams over two openings
- Goalpost frames for wide spans
Extensions
Steelwork for rear and side extensions
RSJs supporting new walls, roofs and large glazing for single and two storey extensions.
- Beams over bi-fold or patio doors
- Steel supporting new masonry or timber
- Padstone and bearing checks included
Loft conversions
Loft RSJs and cranked beams
Steelwork for dormers and loft conversions in Victorian, Edwardian and 1930s roofs.
- Cranked beams picking up new joists
- Ridge beams and purlin support steel
- Support checks on existing walls
Chimneys
Chimney breast removal steel
Steel designs when removing one or more chimney breasts from a room or floor.
- Beams at floor level under remaining stack
- Load paths checked down to foundations
- Notes for safe removal sequence
Posts & frames
Steel posts, padstones and simple frames
When loads cannot sit on existing walls we design SHS posts, padstones and simple frames.
- SHS posts under beams and lintels
- Concrete padstone sizing
- Simple connection notes for site
Checks & reports
Structural checks and RSJ reports
Independent checks and reports where records are missing, layouts have changed or lenders request confirmation.
- Calculations for existing beams
- Reports for solicitors or lenders
- Support with Building Control queries
Simple four-step RSJ design London process
Clear steps from first enquiry through to the final calculation pack.
1
Share your project
Send photos, basic measurements and any plans. A quick call helps confirm the layout.
2
Fixed fee agreed
You receive a clear fixed fee and scope before we start any RSJ design work.
3
RSJ design completed
A structural engineer designs the beam, checks loads and deflection and prepares the pack.
4
Pack sent for use on site
You get drawings and calculations ready for your builder and Building Control officer.
What London clients say
Homeowners and builders who wanted RSJ designs that work first time on site.
We needed an RSJ design for a kitchen knock-through in a Victorian terrace in Islington. The drawings were clear and Building Control approved everything on the first review.
Sarah – Islington N1
★★★★★
Our builder asked for proper calculations before ordering steel. The RSJ design arrived within two days with all padstone sizes and notes. He said it was easy to follow on site.
Mark – Ealing W5
★★★★★
Loft conversion steelwork in a 1930s semi in Croydon. The engineer worked with our architect so we knew the beams would fit before we changed the roof layout.
Amrita – Croydon CR0
★★★★★
Frequently Asked Questions
Quick answers to the questions London homeowners ask about RSJ and wall removal design.
What is the typical turnaround time?
Most RSJ or wall removal calculations are completed within 24 to 72 hours once we have clear drawings, measurements and photos. Larger projects such as full extension or loft packages usually take five to seven working days.
Do you handle Building Control submissions?
We provide a full calculation pack ready for Building Control. You or your architect normally submit the application, but we can support you and answer any technical questions from your Building Control officer.
What information do you need for a quote?
Your property address, a short description of the work, clear photos and basic measurements of the wall or opening. If you have architect plans or sketches, send those as well and we will review everything together.
Can you work from photos only?
Many domestic RSJ designs in London can be completed from good photos, measurements and existing plans. Where access is tricky or structure is unclear, we may advise a site visit before final calculations.
Ready to price your RSJ design in London?
Send your photos and a quick description and we will respond with a fixed fee and expected turnaround.
Request a RSJ design quote
Use this form to outline your project. Later, your developer can connect it to email or your booking system.
Tell us about your project
Share a few details so we can review the layout and confirm the right RSJ design service and fee.
Your enquiry is sent straight to our engineering inbox. We usually reply within one working day.
- Head Office: Corwell Lane, Uxbridge, England, UB8 3DE.
- 07359 267907
- info@structuralengineercalcs.com
- Company No: 12653163