How to adjust the cable tray tee

A cable tray tee can be modified either on-site by adjusting the physical fitting or in design software by editing its type properties, adding gussets, or creating branch take-offs.

Modifying a Tee in Design Software

1. Revit or BIM Software:

• In Revit, a tee fitting has three connectors. You can modify its appearance or mimic a branch fitting by adjusting the Type Properties → Fittings → Tee, but the tee must retain three connectors to function correctly .
• For custom shapes, you can create a new unconnected run at right angles and annotate any on-site modifications, such as chopping the upstand edge to fit a branch .
• Using the API, you can programmatically create or adjust tees with methods like NewTeeFitting, ensuring proper alignment and orientation with connected trays . 2. eVolve or AVEVA:
• In eVolve, select the tee family and adjust attributes such as tray width, bend angle, or reducing width to modify the tee dimensions .
• In AVEVA, use the Modify Material functionality to change attributes or dimensions of a cableway branch, including creating tees, crosses, or reducers . Apply changes to commit modifications. 3. Adding Gussets:
• For structural reinforcement or custom angles, you can add a gusset to a tee. Tutorials show how to calculate and attach gussets to achieve a perfect tee every time .

Physical On-Site Modifications

• Some branch fittings exist in real life that allow a take-off without a full tee. These often require cutting or chopping the main tray to fit the branch properly .
• Ensure that the modified tee maintains structural integrity and that all connections are secure, typically using screws or bolts as specified by the manufacturer.

Practical Tips

• Always verify the alignment and orientation before committing to modifications, whether in software or on-site.
• Annotate any non-standard modifications in your design documentation to guide installation teams.
• Consider using manufacturer-specific fittings (e.g., Legrand branch pieces) if available, as they may simplify installation and reduce on-site cutting . By combining software adjustments with careful on-site modifications, you can effectively modify a cable tray tee to meet both design and installation requirements.