Warning · Spatial structure
How to fix Duplicate storey elevation
in IFC files
Give each IfcBuildingStorey a distinct Elevation — levels at the same height break plan generation and storey filtering.
Check your IFC file — free
No account · No upload · Runs in your browser · 38 validation checks
What it means
The Duplicate storey elevation check
Two or more storeys in the same building share the same elevation value
The fix
How to fix Duplicate storey elevation in your authoring tool
Concrete, tool-specific steps. The check itself is schema-agnostic and works for IFC2x3, IFC4, IFC4x1 and IFC4x3.
| Authoring tool | How to fix |
|---|---|
| Revit | Two levels share the same elevation. In the Levels view give each Level a unique elevation (or delete the duplicate), and export only true building storeys as levels (turn off “Building Story”/export on the others). |
| ArchiCAD | Open Story Settings and set a unique elevation per story; merge or delete duplicated stories at the same height. |
| Tekla | In the level/phase list assign a unique elevation to each level used for the IFC storey structure and remove duplicates. |
| Allplan | In the building structure set distinct heights per storey and remove duplicate storeys that resolve to the same elevation. |
How it works
Find and fix it in the browser
The whole flow runs client-side — your IFC file never leaves your machine.
01
Open your IFC file
Open IFC Viewer Online and drag & drop your IFC file. It is parsed locally in your browser via WebAssembly — nothing is uploaded.
02
Run the Health Score validation
Run validation. The "Duplicate storey elevation" check (RULE_STOREY_ELEVATION_DUPLICATE) flags every affected element and pinpoints it in the model…
03
Fix in Revit
Two levels share the same elevation. In the Levels view give each Level a unique elevation (or delete the duplicate), and export only true building…
04
Fix in ArchiCAD
Open Story Settings and set a unique elevation per story; merge or delete duplicated stories at the same height.
05
Fix in Tekla
In the level/phase list assign a unique elevation to each level used for the IFC storey structure and remove duplicates.
06
Fix in Allplan
In the building structure set distinct heights per storey and remove duplicate storeys that resolve to the same elevation.
07
Re-validate
Re-export from your authoring tool and re-run validation to confirm the issue is resolved and your Health Score improved.
Related checks
Other Spatial structure checks →
Check your whole model, not just one rule.
Duplicate storey elevation is 1 of 38 checks. Run the full IFC Health Score to see every issue and a single 0–100 number — free, no account, no upload.
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