Load-bearing wall removal
Taking out a load-bearing wall means something new has to carry everything that wall was holding up. We size the beam, design the supports and prove it to Building Control, for homeowners and builders across the UK.
How do I know if my wall is load-bearing?
We look at the direction of the floor joists, whether a wall or roof member sits above it, and how it ties into the external walls. A wall carrying joists at right angles or sitting under another wall is almost always structural. We confirm it before designing anything.
How to tell if a wall is load-bearing
The first question on any wall job is whether the wall is actually carrying load, and the answer is rarely obvious from inside the room. A wall that runs at right angles to the floor joists above usually supports them, and a wall that sits directly below another wall on the floor above is almost always structural. We look at the direction of the joists, the position of walls on the storeys above, the roof structure and how the wall meets the external walls before deciding what has to be replaced.
Some walls carry more than their appearance suggests. An internal wall can pick up a section of roof, a purlin, a water tank or a stair trimmer, and a wall that looks like a simple partition can be a spine wall holding up the whole first floor. We identify everything the wall carries so the replacement beam is sized for the real load, not a guess, and so nothing above it is left unsupported once the wall is gone.
Sizing the beam and the supports
Once the loads are known we gather them into a line load along the top of the opening and size a beam to carry it. For most homes that is a universal beam or universal column in steel, chosen to span the opening and keep deflection within span over 360 so plaster and finishes above do not crack. Where headroom is tight we look at a wider, shallower section or a flitch beam of steel plates bolted between timber, and where two walls meet we may need a goalpost frame with posts and a base connection.
The ends of the beam matter as much as the beam itself. Each end bears onto a padstone, a solid concrete or high-strength masonry block that spreads the reaction into the wall below without crushing the brickwork. We check the bearing stress, specify the padstone size and confirm the masonry or pier beneath can take the point load down to the foundation. If it cannot, we design a new pier or a spread footing so the load has a clear path to the ground.
Temporary works and safe sequencing
Removing a load-bearing wall is a moment when the house is briefly held up by props rather than the wall, so the temporary works are part of the design, not an afterthought. We advise on needle and prop arrangements, acrow spacing and strongboy supports so the floor or roof above stays fully supported while the wall comes out and the new beam goes in. Getting this wrong is where walls crack and ceilings drop.
The calculations set out a safe order of work, prop first, break out the wall, set the padstones, lift the beam onto its bearings, pin up tight, then strike the props once the beam is taking load. Your builder follows that sequence on site, and Building Control can see the structure was never left unsupported. We deliver the full package to the Eurocodes and Approved Document A anywhere in the UK or Europe, with a site visit arranged by region where the wall needs to be inspected first.
What we check.
The points our calculations resolve for a project like this.
- Confirming whether the wall is load-bearing from joist direction, walls above and roof structure
- Full line load along the opening including floors, roof and any wall above
- Beam sizing in steel, flitch or goalpost form with deflection limited to protect finishes
- Padstone and bearing design with the pier and load path checked to foundation level
- Temporary propping arrangement and safe order of work for the removal
- Pier or footing design where the existing masonry cannot take the point load
Issued drawings, redacted.
From enquiry to sign-off.
Enquiry
Send drawings or describe the problem. We confirm the scope, the deliverables and a target timescale.
Information
We agree the survey, drawings or data we need and any site access required.
Engineering
Design, calculation or assessment to the relevant Eurocodes and UK National Annex.
Issue
A clear, defensible report or set of calculations, with assumptions and limitations stated.
Common questions
How do I know if my wall is load-bearing?
We look at the direction of the floor joists, whether a wall or roof member sits above it, and how it ties into the external walls. A wall carrying joists at right angles or sitting under another wall is almost always structural. We confirm it before designing anything.
What size beam will I need to remove the wall?
It depends on the span and everything the wall carries. Most removals use a steel universal beam sized to keep deflection within span over 360, but a flitch or goalpost frame is used where headroom or side walls demand it. The calculations give the exact section.
How much does structural engineering for wall removal cost?
Our fee starts for the calculations, beam design and drawings, agreed as a fixed price up front. The final figure depends on the span, the number of openings and whether new piers or foundations are needed.
Do I need Building Control approval to remove a load-bearing wall?
Yes. Removing a load-bearing wall is notifiable work under the Building Regulations, and Building Control will want structural calculations for the beam, its supports and the load path. We prepare that package so it is accepted without a run of queries.
Can you advise on propping while the wall comes out?
Yes. Our design includes the temporary works, needle and prop positions and the safe order of work, so the floor or roof above stays supported throughout and the beam only takes load once it is properly bearing.
Related in home & residential structural engineering.
Tell us what you are building.
Send the drawings or describe the project. We confirm scope, deliverables and a realistic timescale.
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