Cable tray with connecting bolts

Cable tray connection bolts are used to securely join sections of cable trays, ensuring mechanical stability, proper alignment, and long-term reliability.

Purpose of Connection Bolts

Cable tray connection bolts are the primary fasteners used to join two or more sections of a cable tray system. They are typically used with splice plates, straight connectors, angle connectors, and other mechanical fittings to create a strong, stable connection that can support the weight of cables and resist vibration or movement over time . Bolts allow for adjustable, removable connections, which is important for maintenance or future modifications .

How They Are Used

• Straight Connections: Bolts are inserted through holes in splice plates and the tray sides to join two tray sections end-to-end. This method is common for long, straight runs of cable tray .
• Angle or Junction Connections: L-shaped, T-shaped, or cross-shaped plates are bolted to tray sections to route cables around corners or splits .
• Connector Types: Standard bolts such as FRS M6 truss-head bolts with combination nuts are commonly used, especially for straight connectors and joint plates .
• Torque Control: Proper torque is critical to prevent loosening due to vibration and to maintain long-term stability . Bolts should be tightened according to manufacturer specifications.
• Installation Tips: Bolts are usually passed from the inner side of the tray rail and secured with nuts on the outer side to avoid damaging cables . For wider trays (e.g., 400 mm or more), joint plates are recommended to prevent transverse bending .

Advantages

• Strong and Reliable: Bolted connections provide a secure hold suitable for heavy cable loads.
• Standardized Parts: Bolts and nuts are widely available and compatible with most tray types.
• Reversible: Connections can be undone for maintenance or reconfiguration.
• Versatile: Suitable for straight runs, angled connections, and complex tray layouts .

In summary, cable tray connection bolts are essential for mechanically securing tray sections, maintaining alignment, and ensuring the system can safely support cables under load while allowing for future adjustments or maintenance .