You can use .IPT, .IAM, or .RFA parametric model files to add parametric bridge or tunnel component parts or assemblies to the Style Palette, and work with them in your InfraWorks civil structure projects.
You can use Autodesk Inventor to create and configure .IPT or .IAM parametric model files for use in Autodesk InfraWorks.
You can use Autodesk Revit to create and configure .RFA parametric model files for use in Autodesk InfraWorks.
You can add new parametric components to the Abutments, Deck, Foundations, Girders, Piers, or Tunnel Segment catalogs. You can also create a new catalog if you want.
Note: You can click ![](../images/ico_gen_add_element.png) in the Catalog Editing section in the top of the Style Palette to add a new Catalog.
![](../images/Configure_Parametric_Models.png)
Attributes of the parametric model you have opened display in the Model Details, Part Sizes, and UI Appearance tabs.
Note: Units of measurement are read-only values determined by the units of measurement used in Autodesk Inventor create the shape template.
The Domain and Component Type attributes within the Model Details tab for a new parametric bridge or tunnel component must be specified when you add a new model. Once you finish adding a model, these values are read-only and cannot be modified.
Note: If the Domain and Component Type are set to Unassigned, you will not be able to use the part in InfraWorks.
To modify Part Sizes, UI Appearance, or Revit category mapping for the parametric model, see [To modify parametric bridge and tunnel components](To-modify-parametric-bridge-and.html).
By default, new parametric bridge and tunnel component styles are added to your model resources folder within C:\\Users\\%username%\\Documents\\...\\unver\\Content\\Parts.
Note: If your InfraWorks model is synced to an Autodesk Docs project, other members of that project can access and use parametric bridge and tunnel component styles you have added to the model once they download a local copy of the cloud model.