Need a Structural Calculation for a Load-Bearing Wall Opening?

A more open layout, but a changed load path

Combining spaces such as kitchen and living room is a common renovation. Creating an opening in a possibly load-bearing wall interrupts the existing load path. Loads then need to be transferred safely through a steel beam, lintel or steel frame.

Typical situations: widening a doorway, removing part of a structural wall, making an opening between kitchen and living room, or replacing wall support with steel.

Is the wall load-bearing? Why that matters

It is critical to determine whether the wall forms part of the load-bearing structure or stability system. Without a proper structural check, there is risk of cracking, deflection, settlement and, in extreme cases, loss of structural integrity.

• Load-bearing wall carrying floors, beams or roof loads
• Stability wall contributing to lateral stability
• Facade opening with lintel, piers and facade loads
• Temporary support during demolition, where required

Why structural substantiation is often requested

For structural changes affecting load-bearing walls, facade piers or stability elements, municipalities and supervisors often want to see that the new structural load path is safe and technically substantiated.

In practice, calculations are prepared using common code frameworks and project-specific assumptions for materials, bearing points, deflection, stability and construction sequence.

What you receive: verifiable and practical

• clear assumptions and structural logic
• steel sizing and calculation checks
• details for bearings, base plates, connections and fixings
• temporary support or demolition sequence where relevant

Permit is not always the issue — safety always is

A wall opening may in some situations be permit-free, but structural substantiation remains essential when changing a load-bearing wall. In monuments, protected areas, or larger renovation projects, it may also form part of a permit dossier.

How we support

• documents aligned with practical technical needs
• technical clarification where needed
• revisions where comments arise, within scope

1) Intake

• address, property type and construction year if known
• photos of wall and surrounding structure
• sketch with desired opening width and height
• existing drawings or calculations if available

Even without existing drawings we can often start, but extra photos and measurements speed up the process.

2) Coordination with contractor

We align the solution with a buildable method: demolition sequence, temporary support, dimensions and bearing conditions. That reduces delay and site confusion.

Where needed, we also advise on temporary support and shoring logic.

3) Delivery of the package

You receive report and drawings as one coherent package, suitable for execution and, where relevant, technical dossier support.

4) Follow-up support

Questions during execution? We can support with interpretation of details and short technical clarification.

What we often see

• insufficient bearing on masonry or concrete
• no proper temporary support during demolition
• column base without correct force transfer
• incorrect steel position relative to floor beams
• stability wall weakened unintentionally
• services or openings in critical zones

Possible consequences

• cracking or excessive deflection
• doors and frames jamming due to movement
• extra repair cost
• site delay or inspection issues
• unclear liability if the dossier is weak

What affects price?

• width and position of the opening
• number of storeys and load path complexity
• materials such as masonry, concrete or calcium silicate blocks
• structural stability role of the wall
• execution complexity, access and phasing
• extra coordination for monument or protected area projects

After intake, we provide a concrete scope and fixed fee. That is more reliable than generic online price indications.

What you can expect

• clear deliverables
• practical details for the contractor
• logical structural substantiation
• fast start once input is complete

Do I always need a permit?

Not always. This depends on the type of intervention, monument status and local rules. Even without a permit, structural safety remains the priority.

What does Aboss need to start?

At minimum: address, photos, desired opening dimensions and any existing drawings or calculations if available.

Is a steel frame always required?

No. Sometimes a beam with sufficient bearing is enough. In other cases, a steel frame is required to transfer loads correctly.

Can you support the technical dossier?

Yes. We can align report and drawings with practical technical requirements and provide clarification if needed.