Methods for fixing carbon steel cable trays

Carbon steel cable trays can be fixed using welding, bolting, or modern stud fastening systems, each offering different advantages in speed, strength, and corrosion protection.

Traditional Fixing Methods

1. Welding: Welding provides a robust and permanent attachment of cable trays to steel structures. It is highly reliable and has been used for decades in industrial installations. However, welding on coated steel may require rework to restore corrosion protection, and it demands skilled labor and proper safety precautions .

2. Bolting: Bolting involves drilling holes in the steel structure and securing the tray with bolts. This method is less labor-intensive than welding and requires minimal specialized equipment, though a magnetic drill may be needed for precision. Bolting allows for easier future modifications but requires access to both sides of the steel for proper installation .

Modern Stud Fastening Solutions

Hilti and other manufacturers have developed stud-based fastening systems to overcome challenges of traditional methods:

• X-ST GR: Stainless steel threaded stud fixed with a powder-actuated tool, offering fast installation without welding .
• X-BT: Stainless steel stud using blunt tip weld technology, creating a fusion along the hole perimeter for corrosion protection .
• S-BT HL: Self-welding threaded stud requiring a pilot hole, providing high torque fixation and strong mechanical stability .
• F-BT: Advanced stud solutions for specific structural requirements, combining speed and durability .

These stud systems reduce installation time, minimize structural damage, and maintain corrosion resistance, making them suitable for coated or galvanized steel surfaces.

Best Practices for Installation

• Support Spacing: Follow manufacturer guidelines for maximum span between supports to prevent sagging and ensure load-bearing capacity .
• Environmental Considerations: Use corrosion-resistant coatings or stainless steel components in humid or chemically aggressive environments .
• System Integration: Ensure all trays, fittings, and supports are compatible and installed as a complete system to maintain mechanical integrity and safety .
• Safety Compliance: Installation should be performed by trained personnel familiar with electrical and structural safety standards, including BS EN 61537 for cable support systems .

Additional Tips

• Use mounting plates or brackets for junction boxes or equipment attachments.
• Ensure proper bonding and grounding of the tray system to prevent electrical hazards.
• Consider ventilated ladder trays for heat dissipation or ventilated troughs for smaller control cables .

By selecting the appropriate fixing method and following best practices, carbon steel cable trays can be securely installed, durable, and compliant with industrial standards.