Vertical Shaft Ladder Cable Tray Installation Bracket

Vertical shaft ladder-type cable trays are installed by securely supporting, aligning, and fastening the ladder sections with proper spacing, ensuring safe cable management and compliance with standards.

Preparation and Material Inspection

Before installation, all cable tray materials, ladders, and accessories should be inspected for compliance with approved submittals and checked for damage or defects. Materials must be stored horizontally on a flat surface with timber supports at intervals of approximately one meter to prevent deformation and protect from moisture and sunlight exposure. Material samples should be submitted for consultant approval, and all operatives must be trained and competent in cable tray installation procedures.

Planning and Layout

Review the approved shop drawings to determine the exact layout, length, and location of the vertical ladder trays. Identify the vertical shaft path, ensuring sufficient clearance for cables and future maintenance. Mark the positions for supports, brackets, and anchor points along the shaft according to the manufacturer's specifications and load requirements.

Support and Bracket Installation

Install vertical supports or brackets at regular intervals, typically every 1. 5 to 2 meters, depending on the tray width, rung spacing, and expected cable load. Ensure that supports are plumb and securely anchored to the shaft walls or structural steel.

For long vertical runs, intermediate supports may be required to prevent sagging and maintain alignment.

Ladder Tray Assembly

Assemble the ladder-type cable trays by connecting sections using splice plates or couplers provided by the manufacturer. Ensure rungs are aligned and the tray is level along the vertical shaft. Ladder trays without covers allow maximum airflow and heat dissipation, which is particularly important for power cables.

Maintain proper rung spacing (commonly 6–12 inches) to support cable positioning and prevent sagging.

Fastening and Alignment

Secure each tray section to the supports using bolts, clamps, or other approved fasteners. Check vertical alignment continuously using a plumb line or laser level. Ensure that the tray is rigid and can withstand the weight of the cables and any imposed loads, including short-circuit forces.

Cables may enter or exit the tray from the top or bottom, and care should be taken to maintain the minimum bend radius for all cables.

Safety and Quality Assurance

All operatives must follow safety induction procedures, wear appropriate personal protective equipment, and adhere to safe work practices. Supervisors should monitor installation, verify compliance with the inspection and test plan, and ensure that any unsafe conditions are corrected before proceeding. QA/QC inspectors should document inspections and testing records to confirm adherence to specifications.

Final Checks

After installation, perform a final inspection to ensure proper alignment, secure fastening, and compliance with design specifications. Verify that the tray can accommodate the intended cable load and that there is no obstruction to cable routing. Ensure that the installation meets relevant standards such as BS EN 61537 for cable tray systems.

By following these steps, vertical shaft ladder-type cable trays can be installed safely, efficiently, and in compliance with industry standards, providing reliable support for electrical and communication cables.