PR: Beam export IfcRectangleProfileDef, ExtrudedSolid dimensions not as expected

[SSeelos]

Problem Description

Issue

when exporting an IFC we realised that the beam parameters (Length (L), Height (H) an Width (W)) got mixed up

there is also a difference depending on the IFC version selected,
we tested on IFC2x3, IFC4x3 and IFC 4 Design Transfer View (DTV)

Used Revit und IFC export versions:
'Autodesk Revit 25.3.0.46 (DEU) - IFC 25.4.0.27'

IFC Definition

from the IFC definition of IfcRectangleProfileDef we expect:
W= XDim, H = YDim.
L = Depth (extrusion)

https://standards.buildingsmart.org/IFC/RELEASE/IFC4_1/FINAL/HTML/link/ifcrectangleprofiledef.htm
this would be consistent with other profile definitions like IfcIShapeProfileDef:

https://standards.buildingsmart.org/IFC/RELEASE/IFC4_1/FINAL/HTML/link/ifcishapeprofiledef.htm

Revit Document

in Revit those parameters seem to be correct
Instance:

Symbol:

Ifc Export

IFC2x3:
H and W switched

IFC4x3
L as W, W as H -> H als L

IFC DTV:
(same as 4x3)

Files

you can get the sample files here (but its in german)
https://www.swisstransfer.com/d/e031d130-37c2-4a47-bb19-a7872d10c6d8
(will expire at 2/15/2025, feel free to contact me)

Revit Version

2024.0.x

IFC for Revit Addon Version

24.x.x

Windows Version

11 22H2

[AngelVelezSosa]

Thanks for the report. We have a number of heuristics to determine the right direction for rectangular beams, which can sometimes be tricky for us since naively any direction could be the extrusion direction. We'll check to see what is special about this case.