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Do you consider necessary to be able to map the, i.e., Beam Segment as IfcElementAssembly?

Yes
11
92%
No
No votes
0%
I don't have the knowledge background to answer
1
8%
#323759
Hello,

When modeling building element parts, such as columns or beam segments, especially in precast systems there is a need to map those geometry instances into the suitable IFC Entity or class. Since GS Archicad also introduced the Beam and Column Segment, there is also a clearer way to achieve this kind of systems, whether your an Architect or an Structural Engineer using this BIM Authoring tool.

The IfcElementAssembly class (see the Entity definition in the already GS AC certified IFC4 ADD2 TC1 Reference View MVD https://standards.buildingsmart.org/MVD ... V1_2/HTML/ covers the following PredefineType values, as its IfcElementAssemblyTypeEnum shows:

IfcElementAssemblyTypeEnum.png
IfcElementAssemblyTypeEnum.png (97.14 KiB) Viewed 660 times

On the other hand, the IFC Project Manager shows the following information:

LackofIfcElementAssembly.png
LackofIfcElementAssembly.png (86.92 KiB) Viewed 660 times

And there is no way to map to this class using the Type Mapping setting in the Export Translator.

Screenshot (5).png
Screenshot (5).png (61.41 KiB) Viewed 660 times

In my opinion, this is a necessary feature for those who are involved in the production of highly granular information models based on IFC Schema.

I hope this wish is considered to be implemented soon.

Kind regards,
#323787
I think that the Archicad IFC mapping has to be as flexible as possible. But it comes at increased complexity to the user.
E.g. are your segments just Beams? Or Building Element Parts (making the beam itself a container without its own geometry)? Or as you suggest an Element Assembly?
#323789
Hi, Stefan!

Well, it depends on how you understand "complexity". Mapping is just that: a correlation between 2 items from different taxonomies. The required knowledge behind each of them should be identified as something assumed by the AEC expert who is modeling (construction knwldg, but also standardized semantics).

IMO, IfcBuildingElementPart as subtype of

IfcElementComponent
An element component is a representation for minor items included in, added to or connecting to or between elements, which usually are not of interest from the overall building structure viewpoint. However, these small parts may have vital and load carrying functions within the construction. These items do not provide any actual space boundaries. Typical examples of IfcElementComponents include different kinds of fasteners and various accessories.

does not cover the modeling of basic and not so small elements, modelled or not with the Beam or Column segment AC tool, that configure a bigger system, structural or not, and cannot be mapped as complete IfcColumn or IfcBeam because are part of a bigger and more complex element.
#324358
Dear All,

Thank you for sharing your thoughts - this is always welcomed and we appreciate the time you've taken to contribute towards the development of the software.

We have entered your comments and suggestions as wish #13045 in our Wish List database.
Hopefully, our Product Management team will adopt this one in the future.

Have a great day!

Best regards,
Minh