PR: Structural Framing - Incorrect geometry IFC4x3
- Dominant language
- C#
- Stars
- 637
- Forks
- 225
- PR merge metrics
- No merged PRs in 30d
Description
### Problem Description
Hello,
if you export curved Structral Framing into IFC4x3 - geometry is not correct (rotated, mirrored, ...)
In IFC 2x3 and IFC4 (ARC or STR Reference view are correct)
IFC 4x3 has this incorrect export.
Tested in Revit 2024 and Revit 2026 → Same behavior
PS: Source RVT file available:
[CurvedStructuralFraming.zip](https://github.com/user-attachments/files/20207136/CurvedStructuralFraming.zip)
### Revit Version
2026.0.x
### IFC for Revit Addon Version
26.1.0
### Windows Version
11 24H2
Contributor guide
Research direction
Start by reproducing the export with the attached CurvedStructuralFraming.zip source in Revit 2024 or 2026 and compare IFC4x3 geometry with IFC2x3 and IFC4 outputs. Trace the IFC4x3 structural-framing geometry export path; done means curved framing is no longer rotated or mirrored in the IFC4x3 result.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- csharp
- Domain
- computer-graphics
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 38/100