REVIT IFC MANUAL

20 | Autodesk Revit IFC manual
As planning proceeds, the slab is given an opening and a gradient, with the underside remaining
naturally flat. Within the IFC schema, representing this component as a swept solid, in other words
generating a solid using a defined profile and pathway, is no longer possible.
The element is thus described as a B-rep object in
the data model, with all the necessary geometry
points. When importing, the slab is recognized
on the basis of its object class (IfcSlab) and
assigned to the correct category. However, the
geometric description no longer corresponds to
the basic principle for creating a floor slab, so a
project family is generated.
This is not a fundamental problem, especially in
terms of coordination, as the slab is correctly
represented. Nonetheless, if you want to edit
the imported slab, certain limitations arise, as
you cannot work on it using the normal tools.
Recommendations for construction
“Edit profile” and “Edit surface” are very useful
tools in the geometric processing of wall and
Recommendations on construction
Edit profile and Edit Footprint are very
useful tools when it comes to modifying
the geometry of wall and ceiling elements.
However, these functions can make the
planner’s life particularly difficult when
it comes to exchanging specialist models
by importing or exporting IFC files, as
geometries may be incorrectly interpreted
or represented.
Likewise, an opening sketched using editing
tools will not always result in the generation
of an “Opening element,” as it would in the
case of a void form.
INSTRUCTIONS FOR REVIT USERS