Vertical T-junction cable tray bend

A vertical T-junction on a cable tray bend is typically created using a custom vertical Tee fitting or by manually combining vertical and horizontal runs to form the junction.

Practical Installation

A vertical T-junction is used when a branch cable tray needs to connect perpendicularly to a main vertical riser. In practice, this is achieved by:

• Using a vertical Tee fitting specifically designed for cable trays, which allows a branch to exit at 90° from the main vertical run. These fittings are often custom or manufacturer-specific, as standard catalogs may not include vertical Tees .
• Maintaining minimum bend radius for cables exiting the bottom of the tray to prevent damage, typically following manufacturer guidelines for spacing and bend radius .
• Supporting the junction with appropriate hangers or brackets to ensure stability, especially in multi-story shafts or long vertical runs .

Modeling in Software

In CAD or BIM software like Revit:

• Standard cable tray families may not automatically generate vertical T-junctions .
• A common workaround is to create a horizontal run at the branch elevation, add an elbow to change elevation, and manually connect it to the vertical riser. This may involve mirroring or adjusting the bend in a section view to align properly .
• Alternatively, custom families can be created from manufacturer BIM content to represent vertical Tee fittings accurately .

Design Considerations

• Cable support and spacing: Ensure rungs or tray bottoms maintain proper spacing (typically 150–230 mm) to support cables and prevent sagging .
• Material selection: Choose tray material (aluminum, steel, or coated finishes) based on environmental conditions and load requirements .
• Safety and accessibility: Ensure the junction allows for easy cable installation and maintenance, avoiding sharp bends or overcrowding. By combining proper fittings, support, and careful modeling, a vertical T-junction on a cable tray bend can be implemented safely and efficiently, both in physical installation and in digital design.