Cable tray fabrication tee dimensions and specifications

Cable tray tee fittings are available in standard widths ranging from 150 mm to 900 mm, with heights typically between 50 mm and 175 mm, and can be supplied as equal or unequal tees.

Standard Widths and Heights

Cable tray tee fittings are designed to match the widths of straight tray sections. Standard nominal widths include 150 mm, 203 mm, 300 mm, 450 mm, 600 mm, 750 mm, and 900 mm. Heights (side rail or tray depth) vary depending on the tray type and material, commonly ranging from 50 mm to 175 mm . These dimensions ensure compatibility with ladder, perforated, or solid tray sections.

Equal vs Unequal Tees

Tee fittings can be equal (all three branches the same width) or unequal (main run differs from branch). When ordering, it is important to specify the widths in the format W1 x W2 x W3, where W1 is the main run and W2/W3 are the branch widths .

Radii and Angles

Fittings are available with different bend radii to accommodate cable routing. Common radii include 305 mm, 610 mm, 915 mm, and 1220 mm, and standard angles are 30°, 45°, 60°, and 90° . This allows flexibility in both horizontal and vertical installations.

Material and Load Considerations

Material thickness affects load capacity and span. Aluminum trays typically use 6063-T5 for straight sections and 5052-H34 for accessories . Proper selection of width, height, and thickness ensures compliance with NEC, NEMA, and IEC standards, prevents overcrowding, and allows adequate heat dissipation .

Summary

When selecting a cable tray tee fitting:

• Match the widths to the straight tray sections (150–900 mm).
• Choose the height according to cable load and tray type (50–175 mm).
• Specify equal or unequal tee configuration.
• Consider bend radius and angle for routing.
• Ensure material thickness meets structural and electrical requirements. These guidelines help ensure proper installation, code compliance, and long-term reliability of cable tray systems.