Friday, July 13, 2018

Free IFC 2018 Add-in v18.4.0

From the Autodesk App Store:

About This Version

Version 18.4.0, 6/25/2018
  • General:
    • Some of the naming conventions for elements have changed.  Please discuss in the forums if this causes problems.
    • This is generally a bug fix release with some new Link IFC functionality.
  • New Export Functionality:
    • Allow columns to be space bounding elements.
    • Allow creating exportable formulas in Revit parameters.
    • Better support for Illuminance and Volume parameter types.
    • Reduce the facet count for some element geometries.
    • Support export of fabrication parts.

  • Export Bug Fixes:
    • Export "NetVolume" and "NetSideArea" quantities instead of "Gross" ones.
    • Export PredefinedType/ShapeType for ramps, stairs and vibration isolators.
    • Fix export of some multi-story stairs.
    • Fix material assignment for some elements.
    • Fix missing predefined type for some elements.
    • Fix missing profile names for some beams.
    • Fix slope calculations for some elements.
    • More fixes to correct "unexpected errors" of certain entity types.
    • Restore calculations for "concealed" and "is external" properties.
    • Restore proper mapping of Revit Grids to IfcGrids.
    • Restore proper GUID for some door, windows, and property sets.
    • Restore remapping of some deprecated IFC2x3 and IFC4 entitites.
    • Restore support for parameter mapping files.
    • Restore support for provisions for voids in IFC2x3.
    • Restore support for IfcSpace "ElevationWithFlooring" attribute.
    • Restore tag for IfcCurtainWallType.
    • Restore tessellation level of detail for coarse tessellations.
    • Restore use of built-in parameters for populating some IFC parameters.
    • (Pre-IFC4) Stop converting space heater types to electric heater types.
    • (IFC4) Properly export some trimmed edges in advanced BReps.
    • (IFC4) Limit distribution ports to IfcDistributionElements only.
  • New Import Functionality:
    • (IFC4) Support IfcCartesianPointList2D, IfcIndexedPolyCurve
  • Import Bug Fixes:
    • Accept structural items that have an undefined LoadBearing parameter.
    • Better processing of slightly non-planar faces.
    • Better processing of some sweeps that have unnecessary start and end parameters.
    • Correct orientation of some objects on import with incomplete placement information.
    • Make sure all created schedules and parameters have unique names.
    • Improve import of some circular extruded geometries whose outer profile curves are slightly disjointed.
    • Improve use of shared geometry across different type elements.
    • Properly cut some geometry when the bounded curve for the half-space solid is missing.
    • (IFC4) Better import of some geometry with NURBS curve-based edges.


The IFC for Autodesk® Revit® 2018 contains up-to-date improvements on the default IFC import and export capabilities of Revit contributed by Autodesk and our Open Source contributors.

While this app is not necessary for IFC support, it is recommended that users that depend on the quality of their IFC files download this app and keep it up-to-date, as new enhancements and defect fixes are added, for more information on IFC, please visit the building SMART website ( or the Revit wiki (

Read Help Document

IFC 2018 is brought to you by Autodesk, Inc. It's free.

This add-in is compatible with Revit 2018.

There's more information available on the Autodesk App Store.

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