Can cable trays be welded with supports

Yes, cable trays can be welded with supports, provided that approved welding procedures are followed and proper installation standards are met.

Welding Feasibility and Method

Cable tray supports can be welded to structural elements to provide a secure and rigid installation. A typical method involves selecting the welding position, temporarily attaching the support to the floor or structure, and then performing the weld on the bonding surface of the support . This ensures proper alignment and stability during welding.

Installation and Safety Considerations

• Supports must provide sufficient strength to handle the cable load and any future additions .
• Welding should be performed according to an approved Welding Procedure Specification (WPS) to ensure structural integrity and compliance with safety standards .
• After welding, touch-up painting is recommended to protect the steel from corrosion and maintain fireproofing requirements .
• Supports should be mounted plumb, level, and rigidly secured, avoiding placement at the ends of tray sections and ensuring proper spacing, typically within 2 feet (600 mm) of expansion splice plates .

Standards and Best Practices

• Cable trays and supports should comply with relevant standards such as BS EN 61537 for cable tray systems and BS 6946 for channel support systems .
• Only competent personnel familiar with electrical installation practices and safety should perform welding and installation .
• Welding is generally used for permanent supports, while expansion guides and hold-down clips may be used at other points to accommodate thermal expansion .

Summary

Welding cable tray supports is a standard practice when done according to approved procedures and safety standards. Proper alignment, support spacing, and post-weld protection are essential to ensure the system's structural integrity and long-term reliability .