Steel Beam Calculation • UK-wide
Steel beam calculation is the starting point for any safe wall removal, extension or loft conversion. We provide fixed-fee steel beam calculations and RSJ design across much of the UK, delivering clear packs that your builder and Building Control officer can use straight away.
Steel beam calculations, RSJ design and wider structural calculations for homeowners, builders and architects across the UK.
Many clients first find us through our YouTube tutorial on how to do a steel beam calculation.
Our YouTube video “How to do a steel beam calculation” has been viewed more than 180,000 times by students, engineers and homeowners who want to understand the process.
The page you are reading goes a step further. Instead of just showing the maths, we handle the full steel beam calculation and RSJ design for your actual project and provide a pack your builder can follow on site.
Focused on the types of structural work most common in houses and flats.
Steel beam calculation for removing internal walls between kitchen, dining and lounge spaces.
Beams, posts and padstones for single and two storey extensions, bi-folds and corner glazing.
Steel beam calculation for loft conversions and dormers, including ridge beams, floor beams and cranked RSJs.
Steel beams and brackets when chimney breasts are removed on one or more floors.
When loads cannot sit on existing walls we design SHS posts, padstones and frames that work with your layout.
Checks on existing beams or altered layouts where records are missing or lenders ask for confirmation.
From first message through to finished steel beam calculation pack.
Send photos, rough sizes and any architect drawings or sketches. A short call can help confirm the layout.
You receive a clear fixed fee and scope before we start any steel beam calculation or RSJ design work.
An engineer designs the beam, checks loads and deflection and sends a Building Control-ready calculation pack.
If your inspector has questions about the steel beam calculation, we respond directly and clarify the design.
Comments from homeowners and builders who used our calculations for real projects.
We opened up the wall between our kitchen and dining room and needed a steel beam calculation 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 structural calculations before ordering any steel. 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 costs, timing and what we need from you.
Yes. A steel beam calculation needs proper load assessment, code checks and judgement on how the existing structure behaves. Online calculators and guesswork do not satisfy Building Control. Our calculations are prepared and checked by qualified engineers.
Fees depend on the number of beams and how complex the layout is. Simple wall removal steel beam calculations are usually a few hundred pounds. Larger extensions or full loft packs cost more. You always receive a fixed fee in writing before we start.
For straightforward domestic projects we usually aim for 24–72 hours once we have clear drawings, photos and measurements. Larger work, such as full extension or loft conversion packs, often takes around five to seven working days.
Yes. Our steel beam calculations follow current UK design standards and are laid out in a format Building Control officers are used to seeing. If your inspector raises any queries we respond directly and clarify the design.
We need the property address, 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 steel beam calculation.
Many domestic projects can be handled from photos and hand-measured sizes. If the structure is complex or access is limited we may suggest a site visit or measured survey before we finalise the steel beam 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 steel beam calculation and RSJ design 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 checks on existing steel, send us a few details. Your enquiry goes straight to an engineer.
