Structural Engineering • Nationwide
RSJ design is the starting point for safe structural alterations. Whether you are knocking down a wall, planning an extension or converting a loft, we provide the specific steel beam calculations required for Building Control approval.
Expert structural calculations for RSJs, steel beams and home renovations across the UK.
We provide structural calculations and steel beam designs for clients in major UK cities and surrounding towns.
Our engineering team supports projects in locations such as:
If you are based near any of these areas, we can likely assist with your structural requirements. We handle projects remotely using your plans and photos, removing the need for an expensive site visit.
We focus on the structural work that UK homeowners and builders encounter most often.
Calculations for steel beams when removing load-bearing walls to create open-plan kitchens or living areas.
Structural design for rear and side extensions, including support for bi-fold doors and new roof loads.
Design of ridge beams, floor joists and cranked steel beams to maximise headroom in your loft conversion.
Steel beam or gallows bracket design to support the remaining chimney stack when removing a breast below.
Where walls cannot take the load, we design steel posts and moment frames to provide stability.
Retrospective checks on steel beams already installed to satisfy mortgage lenders or Building Control.
A simple, step-by-step approach to getting your structural calculations sorted.
Email us your architectural plans, sketches or clear photos with measurements. We will check if we have enough info to proceed.
We provide a fixed fee for the design work. You will know exactly what the cost is before we start any calculations.
Our engineers calculate the loads, size the steel beams, and specify the correct padstones and supports for your project.
You get a digital pack containing the calculations and drawings, ready to hand over to your builder and Building Control.
Here is what homeowners and builders say about our structural calculation services.
We needed calculations for a knock-through between the kitchen and diner. The pack was clear, detailed and passed Building Control without any issues.
My builder insisted on proper steel calculations before starting the extension roof. The engineer provided exactly what was needed, including padstone sizes.
Excellent service for our loft conversion. They designed the ridge beam and floor steels based on our architect's drawings. Very professional.
We bought a house with missing paperwork for an old beam. The team checked the steel and provided a report that satisfied our mortgage lender.
Answers to the things we get asked most often about steel beams and calculations.
Yes, most likely. We cover the majority of the UK. Send us your postcode and project details, and we will confirm if we can help.
For simple wall removals, we aim for a 24–72 hour turnaround once we have all the information. Larger projects like extensions may take up to a week.
Yes. All our designs adhere to British Standards and Eurocodes. We deal with any technical queries from the inspector as part of the service.
We need the property address, a description of the work, photos of the area, and rough measurements. If you have architectural drawings, please send those too.
For straightforward beams, photos and your own measurements are often sufficient. For complex jobs, we might need professional plans.
Our fees are fixed and depend on the complexity of the job. We always provide a written quote before starting any work.
Fill in the form below to tell us about your project. You will speak directly to a structural team member.
Please provide a brief outline of the work so we can give you an accurate price for the calculations.
We aim to reply to all enquiries within one working day.
If you are planning to remove a wall, build an extension or convert your loft, get in touch. We can provide the structural expertise you need.
