Cable tray tees can indeed be fabricated on-site using standard sheet metal components and accessories.

Feasibility and Methods

Cable tray tees, along with other fittings like elbows and reducers, can be assembled or fabricated on-site from materials such as mild steel (M.S.), pre-galvanized steel, stainless steel, or aluminum sheets . On-site fabrication typically involves cutting, bending, and joining sheet metal sections to form the desired tee configuration. Accessories such as splice plates, clamps, brackets, and hangers are used to connect and support the trays securely .

Materials and Standards

Materials commonly used for on-site fabrication include M.S. sheets, pre-galvanized sheets, and stainless steel, which provide strength, corrosion resistance, and durability . Fabricated tees must comply with relevant standards such as NEMA VE 1-3.02, BS EN 61537, and CENELEC EN 50173-1, ensuring mechanical integrity and electrical safety . Aluminum trays are also formable on-site due to their lightweight and corrosion-resistant properties .

Practical Considerations

• Tools and Equipment: On-site fabrication requires sheet metal cutting tools, bending machines, and fastening hardware.
• Ventilation and Cable Management: Perforations on trays allow for cable ventilation and secure tying .
• Customization: On-site fabrication allows for custom dimensions and configurations, accommodating unique routing requirements or space constraints.
• Installation Efficiency: Using pre-engineered components and CAD designs can streamline on-site assembly, reducing installation time and ensuring precision .

Conclusion

On-site fabrication of cable tray tees is a practical and widely used approach, especially when standard pre-fabricated tees do not fit specific installation requirements. By using appropriate materials, tools, and accessories, installers can create durable, compliant, and customized cable tray systems efficiently .