AutoBRIDGE | Add Custom Nested Family for Corridor

Add Custom Nested Family for Corridor

Complete professional workflow for building adaptive nested families and deploying them inside AutoBRIDGE Family Manager.

Phase 1: Adaptive Family Creation

01Create Generic Model Adaptive Family

Create a new Metric Generic Model Adaptive family for the nested element. Select the template and open it.

pic01 – Metric Generic Model Adaptive template

02Assign the View

Open Front View to start preparing the section.

pic02 – Front view opened

03Add Asphalt Reference Plane

Add reference plane for asphalt thickness and create a dimension parameter to control it.

pic03 – Asphalt reference plane and parameter

04Assign Work Plane

Assign work plane to Center Front before placing adaptive points.

pic04 – Center Front work plane

05Add Intersection Point

Add intersect point from vertical reference plane and new horizontal reference plane.

pic05 – Intersection point created

06Associate Superelevation

Select the point → Show Reference Planes: Always → Associate rotation angle to family parameter Superelevation.

pic06 – Superelevation parameter mapping

07Assign Work Plane to Point

Set work plan and Pick a plane on the point surface as work plane to ensure rotation control.

pic07 – Work plane assigned to point
💡 Workflow Trick: Use Existing Template

Instead of starting from scratch, you can copy and paste the current nested_family_template from:
..\\Documents\AutoBRIDGE\Modeler\XXXX\nested_family_template
Updating an existing template saves time and ensures consistent parameters.

Phase 2: Geometry Creation & Rotation Test

08Create Box Girder Reference Lines

Create reference lines to form custom box girder. Add parameters: Right, Left, Depth and any required corridor dimension.

pic08 – Box girder references and parameters
⚠️ Critical Parameter Rules

When creating or updating your nested family, ensure the following to avoid corridor errors:

  • All parameters must be set to Instance (not Type).
  • All parameters must be "clean"—meaning No Formulas should be used in the formula column.

09Test Superelevation

Test rotation, by adding value to superelevation parameter. If error appears, dimensions are not related to adaptive point. Remove wrong constraints and reapply correctly.

pic09 – Rotation error example

10Rotation Success

Rotation works smoothly with Superelevation parameter.

pic10 – Rotation success

Phase 3: Boundaries & Subcategories

11Draw Boundaries

Reset rotation. Draw spline through points for outside and inside boundaries separately.

pic11 – Spline boundaries

12Create Subcategories

Manage → Object Styles → Generic Model → New Subcategory. Create Solid & Void.

pic12 – Subcategory creation

13Verify Subcategories

Ensure two subcategories created correctly.

pic13 – Subcategories created

14Assign Subcategories

Assign Solid to outside boundary and Void to inside boundary.

pic14 – Subcategory assignment
💡 Tip: Non-Rotated Sub-Families

You can use another sub-nested family without rotation and load it onto the rotated points. This allows easier control of geometry within the corridor.

Phase 4: AutoBRIDGE Family Manager

15Open Family Manager

Open AutoBRIDGE → Family Manager.

The Family Manager interface is organized into the following main sections:

  • 1. Nested Family Preview: Displays a live preview of the selected family.
  • 2. Template Section: Manage existing or new templates for future project reuse.
  • 3. Nested Family List: Shows all nested families in the active template.
  • 4. Subcategory List: Displays subcategories inside the selected nested family.
  • 5. Current Template: Indicates the template active for corridor creation.
Family Manager Interface
pic15 – Family Manager interface layout

Watch the detailed Family Manager tutorial video here

16Create Template

Create new template and assign name.

pic16 – Template creation

17Make Current

Select template and press Make Current.

pic17 – Template set as current

18Add Nested Family

Press Add and select created nested family. Confirm success message.

pic18 – Nested family added

19Verify Nested Family List

Ensure nested family appears in list correctly.

pic19 – Nested family in list

Phase 5: Corridor Validation

20Check in Corridor Creation

Open Corridor tool (Civil3D or other workflow). Confirm template and nested family appear in Family section.

pic20 – Corridor family selection

For more details on the corridor generation process, visit the full Corridor Creation Workflow.

21Corridor Success

Final corridor generated successfully with adaptive control.

pic21 – Final corridor success
Improvement Tip: Keep consistent parameter naming and subcategory mapping to reuse templates across multiple projects without rebuilding nested families.
© 2026 AutoBRIDGE Documentation | Nested Family Corridor Workflow
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