For horizontal cable trays, supports should typically be spaced between 1.5 meters and 3 meters, with additional supports at tray ends, bends, and every 3–5 meters along straight runs.

Recommended Support Spacing

For straight horizontal sections, the distance between supports (span) should generally range from 1.5 meters to 3 meters, depending on the tray type, material, and cable load. This spacing ensures structural stability, prevents sagging, and allows for easy maintenance and inspection (Apex Tray) . At corners, bends, or T-junctions, it is necessary to install one support on each side of the bend, arranged symmetrically, to prevent stress on the cables and maintain tray stability .

Securing Cables

Cables within the tray should be fixed at both ends, at bends, and at cable joints, and along straight horizontal runs every 3 to 5 meters to maintain organization and prevent displacement .

Additional Considerations

• Fixed supports should be placed at the beginning and end of the tray, at corners, and when the tray spans more than 30 meters .
• Hanging rod supports should have a minimum diameter of 8 mm and be installed at beam locations for robust structural stability .
• Avoid placing direct plate connections at the midpoint of the span or on the support point to prevent stress concentration .
• For long horizontal runs, consider the weight of cables and potential expansion due to temperature changes, especially in flexible systems, to prevent sagging or displacement .

Summary

In practice, a horizontal cable tray should be supported every 1.5–3 meters, with additional supports at ends, bends, and long spans, and cables should be secured every 3–5 meters along straight sections. Proper placement of supports and cable fixing ensures structural integrity, safety, and ease of maintenance.