PR: Super long IfcOpeningElements exported

[andydandy74]

Problem Description

We ran into a curious case where the way elements were joined resulted in very elongated IfcOpeningElements being exported. We encountered multiple instances of this issue but were able to reduce it to a fairly minimal model.

Setup

• Roof construction modeled as floor slab
  • Sketch contains some openings
• Roof covering modeled as roof
  • Sketch contains no openings
  • Geometry joined with floor slab
• Opening in roof element modeled as generic model
  • Geometry joined with floor slab
  • Located on top of opening sketch of floor slab

Model located here:
https://github.com/andydandy74/MyIssues/blob/master/RevitIFC763/158_IFC_ElongatedIfcOpeningElements.rvt

Workaround

After unjoining floor and roof geometry and cutting generic model from roof, all IfcOpeningElements export properly. The element that's causing this is the generic model void family, likely because it is located exactly above an opening of the same size in the floor slab below.

Revit Version

2024.2

IFC for Revit Addon Version

24.2

Windows Version

10 22H2