# Ifc Curtain Wall

**URL:** https://forums.buildingsmart.org/t/ifc-curtain-wall/1076
**Category:** IFC
**Created:** [February 26, 2019, 9:30am UTC](https://forums.buildingsmart.org/t/ifc-curtain-wall/1076 "2019-02-26T09:30:42Z")
**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: [February 26, 2019, 9:30am UTC](https://forums.buildingsmart.org/t/ifc-curtain-wall/1076/1 "2019-02-26T09:30:42Z")

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Hi there

The use of the classification IfcCurtainWall is known to me. However, if a concrete ceiling is cantilevered and the underside is clad with the “same” Curtain Wall system, should I classify the horizontal components as a curtain wall too or rather as IfcCovering with the predefined type ceiling?

Thank you!