# IfcEntity for cantilever slab connection

**URL:** <https://forums.buildingsmart.org/t/ifcentity-for-cantilever-slab-connection/1530>\
**Category:** IFC\
**Created:** [June 21, 2019, 12:43pm UTC](https://forums.buildingsmart.org/t/ifcentity-for-cantilever-slab-connection/1530 "2019-06-21T12:43:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ugogreco](https://avatars.discourse-cdn.com/v4/letter/u/3d9bf3/32.png) [@ugogreco](https://forums.buildingsmart.org/u/ugogreco)\
**Post date:** [June 21, 2019, 12:43pm UTC](https://forums.buildingsmart.org/t/ifcentity-for-cantilever-slab-connection/1530/1 "2019-06-21T12:43:38Z")

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Hi there

I’ve got a question about thermally-insulated cantilever slab connections (I hope these elements will be called like this). In your opinion as what should they be classified these most suitable:

- IfcSlab (because the element is a part of the slab)
- IfcBeam (because of similar geometry dimensions)
- IfcCovering (because of the thermal insulation function)
- IfcWall (because of the tool used to model it in CAD)
- IfcBuildingElementProxy (because in fact it doesn’t fit into any group above)

Thank you for your answers!