Installation of Vertical Supports for Cable Trays

Vertical supports for cable trays are typically installed using trapeze hangers or cantilever wall brackets, ensuring proper load distribution, alignment, and compliance with standards.Types of Vertical SupportsTrapeze Hangers: These are ceiling-mounted supports consisting of two vertical rods connected by a cross member, which holds the cable tray. They allow for easy adjustment and provide strong mechanical support for long horizontal runs of cable trays .Cantilever Wall Brackets: These are mounted directly to walls for vertical or near-vertical tray runs. They are ideal for supporting cable trays along walls or in tight spaces where ceiling suspension is not feasible .Installation Steps for Trapeze HangersPrepare the Rods: Thread hex nuts 25–50 mm above the intended tray bottom location. Slide on square washers to distribute load evenly .Attach Cross Member: Position the cross member between the vertical rods, ensuring holes are slightly larger than the rod diameter for easy adjustment. Secure with a second set of washers and hex nuts .Mount the Tray: Place the cable tray on the cross member and adjust the top nuts until the tray is level and snug. Ensure the tray clips are properly aligned for horizontal adjustment .Check Load Capacity: Maximum load per hanger typically ranges from 318 kg to 340 kg, with support spacing up to 3.6 m, depending on tray type and cable weight .Installation Steps for Cantilever Wall BracketsSelect Bracket Location: Mount brackets at intervals recommended by the manufacturer, typically every 1.2–1.5 m for ladder trays and 1.5–2 m for ventilated troughs .Secure to Wall: Use appropriate anchors or bolts for the wall material. Ensure brackets are level and aligned with the tray route.Attach Tray: Place the tray on the bracket and secure with tray clips or bolts. Verify that the tray is level and can accommodate cable fill without sagging .Best PracticesSupport Spacing: Follow manufacturer guidelines and standards (DIN EN 61537, BS EN 61537) to prevent excessive deflection or sagging .Load Considerations: Include the weight of cables, fittings, and environmental loads such as wind or snow in calculations .Alignment and Leveling: Ensure all vertical supports are plumb and the tray is level to facilitate cable installation and prevent mechanical stress .Material Selection: Use steel, stainless steel, or corrosion-resistant finishes suitable for the environment to ensure long-term durability . By following these methods, vertical supports for cable trays can be installed safely, efficiently, and in compliance with industry standards, ensuring reliable cable management and structural integrity.