I would not recommend using morphs. In my experience steel profiles sometimes change in a project and changing a complex morph shape is a royal pain in the behind.
The beam objects should have hotspots for the incline in both sections and 3D view. You can pick top, bottom or middle axis in the dialog settings.
I've used single plan roofs with 0 thickness as SEO operators on a hidden SEO layer to create mitred joints on complex profile beam/collumn connections in the past, that sort of works. You can rotate/incline the roof in section/elevation view.
You can also give any element an override for IFC settings. Make a morph export as a beam etc. Do not feel limited to using the tools for their description/name. A profiled wall can be a concrete beam, a roof can be an inclined slab, etc.
Erwin Edel, Project Lead, Leloup Architecten
www.leloup.nlArchiCAD 9-26NED FULL
Windows 10 Pro
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