Structural calculationPrice on requestWhat is assessed?
An extension enlarges an existing space. The facade or load-bearing wall often also changes. The structural engineer assesses the new construction and the consequences for the existing building.
Agree whether the breakthrough and the new foundation are in the same assignment. Then the loads and connections can be coordinated.
What data is needed?
The following information can be used to prepare the assessment. The structural engineer determines whether additional research is necessary.
- Existing and desired floor plan
- Sections and dimensions
- Soil and foundation information
- Desired roof structure
What do you receive?
Record the exact delivery in the quotation. Depending on your project and assignment, this involves:
- Calculation of the extension
- Assessment of relevant existing components
- Structural overview drawing
Discuss who will take care of the architectural development, supplier details and any temporary support. In this way, the components involved are coordinated.
Materials and drawings
The choice of materials and connections follow from the design. Read more about Concrete and reinforcement and the difference between a architectural drawing and a construction drawing.
How does the process proceed?
You describe your project and share the available data. The assignment, any additional information and planning are then coordinated. Check it out complete step-by-step plan for all phases.
What does your assignment cover?
Enlarging an existing room requires coordination between the wall being removed and the new extension. Draw the desired clear opening and any space available for columns. The engineer can then align the support structure with your intended layout.
Can I already order material?
Order structural parts based on the coordinated and current design data. A preliminary estimate is not a complete basis for this.
Is a site visit necessary?
That depends on the project and the available information. Sometimes drawings and photos are sufficient for the inventory; sometimes an admission or additional examination is necessary.
What happens if my plan changes?
Report changes before they are implemented. The structural engineer assesses whether calculations and drawings need to be adjusted.
From data to a detailed plan
Checklist for your application
| Given | What you prepare |
|---|---|
| Existing and desired floor plan | Gather the most recent available data and identify what is missing. |
| Sections and dimensions | Gather the most recent available data and identify what is missing. |
| Soil and foundation information | Gather the most recent available data and identify what is missing. |
| Desired roof structure | Gather the most recent available data and identify what is missing. |
- Describe your complete construction plan.
Expand an existing space with a well-thought-out foundation, roof construction and connection.
- Discuss missing data.
The structural engineer determines which site survey or additional information is required for the agreed assessment.
- Record order and delivery.
Agree on the calculated parts, drawings, price and planning.
- Coordinate the design with the construction work.
Use the current documents and have relevant changes reviewed before they are implemented.
Frequently asked questions about expansion
Which existing parts are relevant for an extension?
That depends on the connection, but the existing rear facade, floors and foundation are often relevant. Have the plan described as a whole and mention previous renovations. Ask in the quotation which existing parts will be included.
Does the roof of the extension have to be calculated separately?
The roof construction is part of the complete design and can be developed within the same assignment. Please provide details of the structure, spans and any solar panels or green roof. Determine the delivery boundaries between structural engineer and supplier.
Related structural topics
Your project location
Provide the building address and share available drawings and photographs. Discuss whether a site survey is needed and which travel or investigation costs form part of the commission.