Autodesk / Autodesk/revit-ifc

PR: IFCUnit Bug - Mass as IFCSpace

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problem
Dominant language
C#
Stars
637
Forks
225
PR merge metrics
No merged PRs in 30d

Description

### Problem Description

Hello,

an exported mass as IfcSpace is exported with some wrong units in the base quantities.

Height IFC >> Tiefe Revit
Unit is swapped.

GrossFloorArea and GrossCeilingArea ???

_GrossFloorArea is a wrong calculation from "Tiefe x Höhe", it should be "Länge x Tiefe"._
_GrossCeilingArea possible the same wrong calculation._

**When is it possible to fix it?**

**Revit 2024:**
Image

Image

**Revit 2026:**

Image

Image

### Revit Version

2024.3.x

### IFC for Revit Addon Version

24.3.2

### Windows Version

11 24H2

Contributor guide

Open the contributing guide

Research direction

No source files, tests, or entry points are named. Reproduce the IFC export for a mass represented as IfcSpace using Revit 2024.3.x and IFC for Revit 24.3.2, then compare Height, GrossFloorArea, and GrossCeilingArea with the reported Revit values. Done means the units and area calculations match the expected dimensions.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp
Domain
desktop
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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