Dimensions of Finished Cable Tray Tees and Elbows

Cable tray tees and elbows are manufactured to match the width and height of straight tray sections, with standard heights ranging from 50 mm to 120 mm and bend radii designed for smooth cable routing.

Standard Dimensions

Width and Height: Finished tees and elbows are designed to correspond to the width of the main cable tray run. Typical heights (H) for ladder, channel, and solid-bottom trays are 50 mm, 70 mm, 100 mm, and 120 mm, ensuring compatibility with straight sections . Widths vary according to cable capacity and project requirements, commonly ranging from 100 mm to 600 mm for industrial and commercial installations . Bend Radius: Elbows and tees are fabricated with radii that allow smooth cable transitions, minimizing stress on cables. The minimum bend radius is generally 1.5 to 2 times the tray width for standard installations, though this may vary depending on cable type and manufacturer specifications . Fitting Types:

• Horizontal Elbows: Change direction in the horizontal plane.
• Vertical Elbows: Change direction in the vertical plane (up or down).
• Tees: Split the main tray into two branches, maintaining the same width and height as the main run.
• Crosses: Allow four-way cable distribution, matching the main tray dimensions . Material and Finish: Fittings are typically made from hot-dip galvanized steel, bare galvanized steel, or stainless steel (AISI 316L), with MIG or TIG welding for structural integrity . Finishes are selected based on environmental conditions, such as indoor, outdoor, or corrosive environments. Standards Compliance: Finished tees and elbows conform to IEC 61537, NEMA VE 1/2, and ASTM standards (A123, A653, A1008, B633) for mechanical strength, corrosion resistance, and electrical continuity .

Practical Considerations

• Ensure the fitting width matches the straight tray section to maintain cable fill ratios and mechanical stability.
• Verify bend radii to prevent cable damage, especially for fiber optic or sensitive instrumentation cables.
• Confirm material and finish suitability for the installation environment.
• Field verification is recommended to account for routing constraints and final equipment placement . By following these guidelines, engineers and installers can select tees and elbows that maintain structural integrity, proper cable spacing, and compliance with industry standards.