The typical spacing between cable tray hanger supports ranges from 1.5 meters to 3 meters for horizontal runs, with vertical supports preferably less than 2 meters apart.

Horizontal Cable Tray Supports

For straight horizontal sections, supports should generally be spaced between 1.5 meters and 3 meters depending on the tray type, load, and material. Fixed supports should be installed at the start, end, corners, T-junctions, and any span exceeding 30 meters to distribute weight and prevent sagging. At bends or corners, one hanger should be installed on each side symmetrically to maintain stability and reduce stress on cables. Hanging rods should have a minimum diameter of 8 mm for adequate strength and stability .

Vertical Cable Tray Supports

For vertical runs, supports should be fixed to the building structure at intervals preferably less than 2 meters. This ensures the tray remains stable and prevents undue stress on the cables. In long vertical runs exceeding 32 meters, strain relief sections should be incorporated to offset the cable by at least two cable diameters per section, preventing excessive tension .

Additional Considerations

• Tray type and load: Heavier or larger trays may require closer support spacing.
• Environmental factors: High temperatures, vibration, or seismic activity may necessitate reduced spacing.
• Future maintenance: Adequate spacing allows for inspection, ventilation, and potential expansion of the cable system.
• Horizontal vs. vertical spacing: Horizontal runs can tolerate slightly longer spans (up to 3 meters), while vertical runs should be more frequent to maintain structural integrity . By following these spacing guidelines, cable tray systems remain safe, stable, and functional, minimizing the risk of sagging, cable damage, or interference.