Smart IFC Exporter 4 allows the user to export model geometry, item properties and material colours to the widely supported Industry Foundation Classes (IFC) format.
This provides you with the ability to import Navisworks BIM data into other construction software packages with ease.
iConstruct’s IFC export capability is useful where updates need to be made to particular components of a Navisworks BIM model, or you, the user, need to analyse the data stored in your Navisworks model using other construction software packages, for example, Clash Checking your data with TeklaTM.
Smart IFC Exporter 4 not only exports just your selected objects, it will also maintain consistent measurement units and map objects to the IFC schema.
If objects in the model are inserts, there is generally only properties at the insert level, although there may be multiple objects beneath the insert level. If properties are brought from the top level to each geometric object then quantity information may be incorrect. The ‘Use Parent Properties’ button merges the contents of inserts and appends the insert information to the single object.
Below is an example of using the “Use Parent Properties” before exporting the IFC file.
Original NWD – note insert has 3 objects
IFC export can be configured to include properties as well the type of object from the Navisworks BIM model to be identified in other CAD packages. In order to map the IFC export
In order to map the object types, the native BIM model needs to be examined to identify the various IFC schema they can be placed. The various object types can be accumulated by using a search set or selection set. Search set can be created by using the Find Tool in Navisworks, whereas selection set can be created either by selecting the objects and creating the set manually or by using ‘Export Data’ to create a mapping table and then ‘Datalinker’ and ‘Audit’ to apply.
Below is an example of a search set:
Below is an example of a selection set by using ‘Export Data’ to create a mapping table and then ‘Datalinker’ and ‘Audit’ to apply:
Once the sets have been created, they can be linked to their respective IFC schema as shown below. This will ensure that other CAD Packages identify the search/selection sets objects as the IFC types assigned on this list.
When this IFC model is imported in Revit, the object type shows the IFC object it was mapped with. In the example below it was mapped as Pipes.
Then comes the property mapping, where the Navisworks properties can be transferred to the IFC objects in its defined IFC fields. In the example below, the Navisworks property ‘itle of il tub of ce’ is the length of the object, and this length can be transferred to the LengthValue field of the IFC simple by dragging the text.
The following image shows that once the exported IFC file is imported into Navisworks, it retains its length value from the property mapping.