Installation of Double-Layer Cable Tray Brackets

Double-layer cable tray brackets must be installed with proper spacing, alignment, and load support to safely accommodate multiple cable trays while complying with standards.

Planning and Layout

Before installation, a pre-determined layout plan should be developed by a qualified designer or engineer familiar with local building codes, electrical standards, and load requirements . The plan should account for:

• Tray alignment for both layers to prevent interference and allow easy cable routing.
• Clearances between trays, walls, ceilings, and other equipment.
• Future expansion, ensuring the brackets can support additional cable loads.

Bracket Selection and Material

Brackets should be manufactured from steel, stainless steel, or aluminum depending on environmental conditions and corrosion resistance requirements . Galvanized or stainless steel brackets are recommended for areas with high humidity or corrosive environments. Ensure that all components are designed and tested together to maintain system integrity .

Mounting and Spacing

• Vertical and horizontal spacing of brackets must comply with the manufacturer's load ratings and standards such as BS EN 61537 .
• For double-layer installations, the lower tray is typically mounted first, followed by the upper tray, ensuring that the brackets can support the combined weight.
• Threaded rods, struts, or wall-mounted supports are commonly used to secure brackets. Ensure that structural members are not cut or drilled without approval .
• Brackets should be installed plumb and level, with deflection limits checked to prevent sagging under load.

Load Considerations

• Calculate the total load including cables, future additions, and any additional equipment.
• Ensure that the bracket and tray system can handle the maximum expected load without exceeding deflection limits .
• Use manufacturer specifications to determine maximum span between supports for each tray layer.

Safety and Compliance

• Installation must be performed by competent personnel familiar with electrical safety and mechanical installation practices .
• Follow local electrical codes and occupational safety regulations.
• Avoid using cable trays as walkways or supports for personnel, as this can cause injury and damage the system .

Final Checks

• Verify that all brackets are securely fastened and aligned.
• Ensure adequate separation between layers for heat dissipation and cable management.
• Inspect for corrosion protection and proper grounding if required. By following these guidelines, double-layer cable tray brackets can be installed safely, efficiently, and in compliance with industry standards, ensuring long-term reliability and ease of maintenance .