Cable Tray Technical Guide A practical guide to product selection and
The choice of method should be discussed with a local inspector. The best decision may be to extend only the cables, creating a discontinuity in the cable tray.
Connection method between power cable tray and truss
Cable trays are typically connected to trusses using suspended supports, brackets, or threaded rods that securely fasten the tray to the structural members while maintaining proper load distribution and alignment.Support ElementsTo connect a cable tray to a truss, support elements are used to mechanically attach the tray to the structure. These include:Suspended supports: Rods or cables hung from the truss to hold the tray from above, allowing for height adjustment and flexibility in alignment .Wall or truss brackets: L-shaped or custom brackets bolted directly to the truss members to provide lateral and vertical support .Center-hung supports: Used for ladder-type trays, these allow cables to be installed from both sides and distribute the load evenly along the truss .Mounting HardwareThe connection typically involves threaded rods, nuts, and mounting plates:Threaded rods are cut to length and attached to the truss using clamps or bolts. Nuts are pre-threaded to secure the tray at the desired height .Mounting plates can be used to attach junction boxes or additional devices to the tray while maintaining structural integrity .Hanger spacing is critical: standard spacing ranges from 3 to 3.6 meters depending on tray type and load, with maximum load per hanger typically between 318 kg and 340 kg .Installation ConsiderationsEnsure the tray is level and aligned along the truss to prevent stress on cables.Avoid using the tray itself as a lifting point; always use proper lifting equipment for installation .Select materials and finishes compatible with environmental conditions, such as corrosion-resistant steel or aluminum for outdoor or humid environments .Maintain minimum bend radius for cables at tray entry and exit points to prevent damage .SummaryConnecting a power cable tray to a truss involves using suspended rods, brackets, or center-hung supports, combined with proper mounting hardware like nuts and plates. Correct spacing, load distribution, and alignment are essential to ensure safety, compliance with standards, and long-term durability of the cable management system .
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Mounting instructions
The fittings are fastened to the cable tray rail either without tools with double clamps (from tray height 60 mm) or with truss-head bolts and combination nuts.