Steel cable tray corridors are installed by carefully planning routes, preparing materials, securing supports, and following safety and standard guidelines to ensure reliable cable management.

Planning and Preparation

Begin by reviewing the approved shop drawings, which detail the layout, lengths, and locations of cable trays in the corridor. Ensure the corridor is cleared of debris and civil works are complete before starting installation. Mark the horizontal and vertical routes for the trays, coordinating with other services to avoid clashes and maintain sufficient clearance for cable pulling and future maintenance .

Material Handling

All cable trays, ladders, and accessories should be inspected upon delivery for damage or discrepancies. Store trays horizontally on a flat surface with timber supports at intervals of about 1 meter, and protect them from moisture and direct sunlight. Only approved materials should be used, and any unsuitable items must be removed from the site .

Support and Hanging System

Install the support system using threaded rods, metal plugs, and 'L' angles or slotted 'C' channels. Maintain a maximum distance of 1.2 meters between supports to prevent sagging. Provide additional support at bends, branches, and offsets. Ensure the supports comply with standards such as BS 6946 for channel support systems .

Installation of Cable Trays

• Position the trays on the supports and secure them using nuts and bolts.
• Use splice plates where tray sections join to maintain structural integrity.
• Ensure proper alignment and level of trays along the corridor.
• For vertical runs, the rungs of ladder-type trays can be used to tie down cables and maintain spacing .

Material and Environmental Considerations

Steel cable trays may be pre-galvanized, hot-dip galvanized, or stainless steel (AISI 316L) depending on environmental conditions. Galvanization protects against corrosion, while stainless steel provides enhanced resistance in harsh or wet environments. Aluminum trays are also an option for lightweight and corrosion-resistant applications .

Safety and Compliance

• Only trained personnel should perform installation.
• Cable trays are not designed to support personnel; they are strictly for cable support.
• Follow all relevant standards, including BS EN 61537 for cable tray systems, and ensure safe handling to prevent injury or damage .

Final Checks

After installation, verify that all trays are level, properly supported, and free from obstructions. Ensure that bends, branches, and offsets are adequately reinforced. Document the installation for future maintenance and inspection purposes . By following these steps, a steel structure cable tray corridor can be installed efficiently, safely, and in compliance with industry standards, ensuring long-term reliability for electrical and communication systems.