Key Points for Installing Ladder-Type Cable Trays

Ladder-type cable trays must be installed with proper support spacing, secure routing, and adherence to safety and structural standards to ensure reliable cable management. Standards and ComplianceLadder-type cable trays should be manufactured and installed in accordance with BS EN 61537 or equivalent local standards, ensuring compatibility with electrical and communication systems. They are designed to support cables, not to serve as walkways or lifting points, and installation should be performed by qualified personnel familiar with electrical safety and installation practices.

Material Handling and Storage

Inspect all materials upon delivery to ensure compliance with approved submittals and check for damage. Store trays horizontally on a flat surface with timber supports at intervals of approximately 1 meter, protecting them from moisture and direct sunlight. Avoid using trays as attachment points for forklifts or chains during offloading to prevent crushing or deformation.

Support and Mounting Requirements

Maintain a maximum support spacing of 1. 2 meters between hangers to prevent sagging. Use threaded rods, metal plugs, and 'L' angles or slotted 'C' channels to secure the tray.

Provide additional support at bends, branches, and offsets to maintain structural integrity. Ensure supports are strong enough to carry the current cable load plus any future additions.

Routing and Clearance

Follow approved shop drawings for horizontal and vertical runs, ensuring no clashes with other services. Maintain sufficient clearance for cable pulling and future maintenance. Ladder trays without covers allow maximum airflow, reducing heat buildup and dust accumulation, making them suitable for areas prone to dust or moisture.

Load and Cable Considerations

Select tray width and rung spacing based on cable type and load; typical widths range from 6 to 48 inches with rung spacings of 6, 9, 12, or 18 inches. Wider trays and rung spacings reduce overall strength; consult manufacturer load charts and adjust for wider configurations. Small-diameter control and instrumentation cables typically require 6, 9, or 12-inch rung spacing to prevent drooping.

Safety and Best Practices

Avoid cutting or drilling structural building members without approval. Ladder trays should not be used as ladders, walkways, or lifting apparatus. Installation should be coordinated with civil and MEP clearances to ensure a safe and efficient layout.

Use proper tools and follow manufacturer guidelines for all fittings, connectors, and hardware. By adhering to these installation requirements, ladder-type cable trays will provide safe, durable, and efficient support for electrical and communication cabling, ensuring long-term reliability and compliance with industry standards.