A vertical tee for cable trays can be created either by fabricating a custom fitting or by modeling a custom family in software like Revit.

Software-Based Approach (Revit or CAD)

1. Create a Custom Family: Vertical tees are not typically available in standard Revit cable tray fittings. You need to create a custom vertical tee family and place it manually in your model .
2. Workaround Method: One common method is to:
   • Create a horizontal cable tray run.
   • Add a vertical riser using an elbow fitting.
   • Adjust the elevation of the horizontal run to align with the vertical branch.
   • Mirror or trim the elbow in a section view to form a vertical tee .
3. API Approach: If automating, use Revit's fitting APIs such as NewTeeFitting or NewElbowFitting to connect two or more cable tray segments programmatically. Each tray segment has connectors, and the fitting is created by specifying these connectors .

Physical Fabrication Approach

1. Measure and Cut: Determine the dimensions of the main tray and the vertical branch. Cut the tray sections accordingly.
2. Form the Tee: Use a gusset or sectioned piece to join the vertical branch to the main tray. Gussets help reinforce the joint and maintain alignment .
3. Bend and Assemble: For metal trays, create a vertical inside elbow (e.g., 45°-45°) to form the tee. Ensure proper spacing between the trays to allow cable installation .
4. Secure the Fitting: Weld, bolt, or rivet the gusset and elbow pieces to the main tray. Check alignment and stability before installation.

Tips for Accuracy

• Always verify dimensions and angles before cutting or bending.
• Use section views in software to ensure the vertical branch aligns correctly with the main tray.
• For DIY fabrication, maintain a consistent gap between trays to allow smooth cable routing .
• Consider locking or grouping the tee and connected segments in software to prevent misalignment during adjustments . By combining these methods, you can either model a vertical tee in a digital environment for planning and documentation or fabricate a physical fitting for installation in the field.