IFC's and Cold Formed Steel Shapes

[tyle...@chiefind.com]

We exported a job from SDS/2 as a .stp then ran it through the
translator to get our IFC file. When I open it up in the Nemetschek
IFC viewer it looks great. After sending it to the GC on the job who
is using revit 2010 I get a call because none of the cold formed C's
or Z's are showing up. Has anyone run into this before? Is there a
setting in either SDS/2 or revit 2010 that needs to be changed?

Thanks,

Tyler

[Robert Lipman]

The way SteelVis writes out cold-formed sections, bent plates, and
corrugated decking to an IFC file is perfectly valid, however, some
applications that import IFC files do not handle it properly. Revit
is one of them.

To check which sections are imported to an IFC application from an IFC
file generated by SteelVis, go to Help > CIS/2 Test Files. This
describes several CIS/2 test files that are located in .../CTV/sample
The file cis2ifc_test3.stp tests all sections. Translate this to IFC
and try importing it to IFC applications.

An improvement to SteelVis would be to write out those sections in a
way that all IFC applications understand as a b-rep. Unfortunately I
don't have time implement that improvement. I would suggest getting
Autodesk to upgrade their IFC import to handle IfcCenterLineProfileDef
which is what is used for cold-formed sections, bent plates, and
corrugated decking in SteelVis.

You might also try Revit's native CIS/2 import and export
http://www.extensions4revit.com/n/e4r/848

--
Bob Lipman
http://cic.nist.gov/lipman/


On Oct 16, 11:31 am, "tyler....@chiefind.com" <tyler....@chiefind.com>
wrote: