800 Cable tray hanging spacing

For an 800 mm wide cable tray, typical hanging spacing is 1.5 to 2 meters for horizontal runs, with closer spacing required at bends or heavy load sections.

Horizontal and Vertical Support Spacing

For standard horizontal runs, cable trays are generally supported at intervals of 1.5 to 2 meters, depending on the tray material, load, and cable type . Vertical runs follow similar principles, but for long vertical sections exceeding 32 meters, strain relief sections should be incorporated to prevent excessive tension on the cables . For extremely long vertical runs over 100 meters, additional tension-relieving measures, such as short horizontal offsets of at least 1 meter, are recommended .

Rod and Bracket Specifications

Hanging rod supports should be at least 8 mm in diameter to ensure stability and prevent sagging . Brackets or hangers must be securely fastened to the building structure, and spacing may need to be reduced near bends, tees, or heavy cable concentrations to maintain structural integrity .

Bends and Cable Ties

At bends, supports should be placed on either side of the bend, and the internal radius should not be less than the minimum bending radius of the cables . Cable ties within the tray should be spaced no more than 1.5 meters apart to maintain even tension and prevent cable movement .

Additional Considerations

• Ensure the tray is installed at least 2.2 meters above the ground and maintains a minimum clearance of 0.3 meters from ceilings or obstructions .
• The tray fill rate should not exceed 50% to allow proper airflow and heat dissipation .
• For flexible systems, calculations may be required to determine support spacing to achieve acceptable deflection . By following these guidelines, an 800 mm cable tray can be safely and efficiently installed, maintaining both mechanical stability and cable performance.