OpenBuildings™ Designer Help

How to Work with IFC

Describes workflow used to define settings and export data to IFC (Industry Foundation Class) file using a LightingFixture symbol.

Note: Different settings are possible in other IFC Classes.
  1. Complete IFC Settings in Symbol Manager.
    1. Open the (Symbol Manager) dialog, select e.g. Open 1x4" and Symbol tab:
    2. Select the corresponding IFC Class in the pull down list, e.g. IFCLightFixtureType.
    Clicking in the IFC Class pull-down list displays available classes. An IFC class selected from the list gets applied to the current cell. The IFC class applies features to 3D symbols.
  2. Set subtype User Defined Attributes (UDA).
    1. Use Symbol placement tool, e.g. Place Symbol, and select e.g.Open 1x4", select Subtpye A1 and click Define.
    2. Select again the Subtype A1 and Edit.
    3. Select Lighting Fixture Schedule Data in the Subtype Properties dialog and set the Attributes Value for each entry.
    4. Click OK, OK again and OK in Place Symbol and insert the Symbol in the drawing.
  3. Visualize in Schedules.
    1. Use (Schedules) to check the settings for placed symbols.
    2. In Schedules dialog select the Light Fixture in the Electrical catalog. Right click and select Modify Properties to see a list of possible Attributes. In the Lighting part you will see the Attribute values from Subtype UDA settings.


  4. Complete IFC Export, Attribute mapping.
    1. Open the (IFC Export) dialog.
    2. Click Map (primary mapping) button in the IFC Export dialog's Output tab to open the Map DataGroup Types and Properties to IFC dialog.
    3. Open the Property Mapping tab and select the Light Fixture entry for Catalog Type.


    4. Set the IFC Properties with selection (on right side) to existing DataGroup Properties:
      DataGroup Properties Mapped IFC Properties
      Ballast (BBES Lighting/ @Ballast) PST_LightingFixture Type Common - (Total Wattage)
      Manufacturer and Catalog number (BBES Lighting/ @LumProducts) PST_LightingFixture Type Common - (ManufacturerSpecific Information)
      MountingType (BBES Lighting/ @MountingType) PST_LightingFixture Type Common - (LightingFixtureMountingType)
      Power (BBES Lighting/@Power) PST_LightingFixture Type Common - (ElectricalDeviceNominalPower)
    5. Click Save to save the settings and then Export (in the IFC Export dialog) to create the IFC file.
Result in Bentley Navigator.

Using Bentley Navigator, you could check/view the IFC properties. Open the IFC file and select e.g. the LightingFixture symbol.

In the Item Details you could see the IFC settings mapped from DataGroup.