Vertical fixing of cable tray cover plates

Vertical cable tray cover plates are fixed using clamps or bolts, typically M6–M12, with proper alignment and torque to ensure secure attachment and prevent sagging.Fixing Method OverviewFor metal or FRP vertical cable trays, the cover plate is attached to the tray using HD cover clamps or fixing bolts. The process generally involves:Positioning the cover over the tray or ladder.Placing the HD cover clamp on one side of the tray channel.Aligning the bolt through the clamp and cover, then securing with a nut and washer.Tightening to the recommended torque, typically around 6 Nm for M6 bolts, to ensure a secure fit without damaging the cover or tray .For wider trays (≥600 mm), additional bolts at the center of the clamp are recommended to prevent sagging, often using M6x20 or M6x25 bolts .Anti-sag clamps may be used in combination with HD cover clamps for larger trays, fixed with pop rivets or bolts through pre-drilled holes .Installation ConsiderationsSupport spacing: Vertical tray supports should be installed at intervals ≤2 m for straight sections and ≤1.5 m near bends, using M12 or larger expansion bolts for anchoring .Vertical alignment: Ensure verticality deviation ≤3 mm per meter, with total deviation ≤10 mm .Material compatibility: Use original system accessories (clamps, bolts, connectors) to maintain structural integrity and warranty compliance .Layered trays: Maintain minimum spacing of 150 mm between power and weak-current trays, and use isolation plates at crossings .Step-by-Step Fixing ExampleLoosely place the cover and clamps on the tray.Drill through the center of the clamp and cover if required.Insert the bolt from underneath the cover, fit the nut on top, and tighten to the recommended torque.For long or wide trays, add additional bolts at the center of the clamp.Verify that the cover is flush, aligned, and free from sagging. This method ensures mechanical stability, safety, and compliance with standards such as IEC 61537 and GB 50303, while preventing damage to cables and maintaining fire and load requirements .