Warning · Spatial structure
How to fix Storey elevation out of order
in IFC files
Order storeys so their Elevation rises from bottom to top — out-of-order levels confuse section/plan tools and reviewers.
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No account · No upload · Runs in your browser · 38 validation checks
What it means
The Storey elevation out of order check
IfcBuildingStorey elevations are not in ascending order within the building
The fix
How to fix Storey elevation out of order 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 | A lower level has a higher elevation (or vice versa). Fix the level elevations or the export order so storeys read bottom-to-top, and check basement/roof levels with negative elevations. |
| ArchiCAD | In Story Settings fix the height of any out-of-sequence story so elevations rise with the story index. |
| Tekla | Reorder/renumber the levels so their elevations ascend; correct any level whose height contradicts its position. |
| Allplan | In the building structure reorder storeys or fix their heights so elevations increase upward. |
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 "Storey elevation out of order" check (RULE_STOREY_ELEVATION_ORDER) flags every affected element and pinpoints it in the model…
03
Fix in Revit
A lower level has a higher elevation (or vice versa). Fix the level elevations or the export order so storeys read bottom-to-top, and check…
04
Fix in ArchiCAD
In Story Settings fix the height of any out-of-sequence story so elevations rise with the story index.
05
Fix in Tekla
Reorder/renumber the levels so their elevations ascend; correct any level whose height contradicts its position.
06
Fix in Allplan
In the building structure reorder storeys or fix their heights so elevations increase upward.
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.
Storey elevation out of order 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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