Vertical Cable Tray Fixing Methods

Vertical cable trays are supported using wall brackets, trapeze hangers, or center-hung supports, ensuring proper load distribution, alignment, and compliance with standards.Key Support Methods1. Wall-Mounted Brackets Vertical cable trays can be fixed directly to walls using wall brackets or support angles. These brackets are attached to the wall structure and provide a secure anchor for the tray, maintaining vertical alignment and preventing sagging. Brackets should be spaced according to the tray type, cable weight, and manufacturer recommendations to avoid undue mechanical strain on the cables or terminations . 2. Trapeze or Swing Supports A common method for vertical trays is the trapeze support, where threaded rods are suspended from a ceiling or overhead structure. Cross members are attached to the rods, and the tray is mounted on these cross members using tray clips. This method allows for horizontal adjustment and ensures the tray remains level while supporting heavy cable loads . Proper sizing of the cross member and clearance for tray clips is essential for safe installation. 3. Center-Hung Supports For installations requiring access from both sides, center-hung supports are used. The tray is supported from a central vertical hanger, allowing cables to be deposited from either side. This method is particularly useful in high-density installations and facilitates easier cable management .Installation ConsiderationsSupport Spacing: Maximum vertical support spacing depends on tray type, cable weight, and load capacity. For example, center-hung supports can handle loads up to 318–340 kg per hanger with a maximum spacing of 3.6 m .Hardware: Use threaded rods, hex nuts, square washers, and mounting plates as required. Holes in cross members should be slightly larger than the rod diameter to allow adjustment without damaging threads .Load and Safety: Ensure the tray system can withstand the weight of cables, environmental factors, and short-circuit forces. Supports must prevent undue mechanical strain on cables and terminations .Standards Compliance: Installations should comply with BS EN 61537 for cable trays and BS 6946 for channel support systems, ensuring safe and reliable operation .SummaryVertical cable tray support requires careful selection of brackets, trapeze hangers, or center-hung systems, proper spacing, and secure attachment to the building structure. Following manufacturer guidelines and relevant standards ensures mechanical stability, safety, and ease of cable installation. Regular inspection and maintenance are recommended to maintain system integrity over time.