Cable tray connection bolt model and specification table

Cable tray connection bolts are typically specified by type, size, material, and finish to ensure secure assembly and compliance with load and environmental requirements.Common Bolt Types for Cable TraysCable tray systems use various bolts depending on the tray type and installation requirements:Hex Head Bolts: Standard for connecting tray sections and fittings; compatible with nuts and washers.Carriage Bolts: Used for mounting trays to support brackets; smooth rounded head prevents cable damage.J-Bolts: Often used for securing ladder trays to ceiling or cabinet tops.Self-Tapping Screws: Used for light-duty or sheet-metal trays where pre-drilled holes are not available.Typical SpecificationsBolt TypeDiameterLengthMaterialFinishApplicationHex HeadM6, M8, M1020–50 mmSteel, Stainless SteelZinc-plated, Hot-dip galvanizedConnecting tray sections, fittingsCarriageM6, M825–40 mmSteel, Stainless SteelZinc-plated, Hot-dip galvanizedMounting trays to bracketsJ-BoltM8, M1050–100 mmSteel, Stainless SteelHot-dip galvanizedCeiling or cabinet suspensionSelf-Tapping#10–#1420–30 mmSteel, Stainless SteelZinc-platedLight-duty tray assemblyMaterial and Finish Considerations:Steel: High strength, suitable for indoor and general industrial use.Stainless Steel: Corrosion-resistant, ideal for outdoor or corrosive environments.Zinc-Plated or Hot-Dip Galvanized: Provides additional corrosion protection for steel bolts .Installation NotesBolts should match the tray hole pattern and load class of the cable tray system.Use washers and lock nuts to prevent loosening under vibration.For ladder trays, J-bolts or mounting plates are recommended for ceiling or rack attachment .Ensure compliance with DIN EN 61537 or equivalent standards for mechanical strength and safety .References for SelectionLegrand Cable Tray Technical Guide provides detailed bolt types and compatibility for their trays .ABB Cable Tray Technical Guide includes tables for bolt sizes, materials, and recommended torque .OBO CMS and Kingpower catalogues list mounting hardware and bolt specifications for various tray types .Hubbell NEXTFRAME® Ladder Tray guide specifies J-bolt kits and hex bolts for secure installation . By selecting the correct bolt type, size, and material, installers can ensure mechanical stability, safety, and long-term durability of cable tray systems.