Cable tray hangers are support elements designed to securely suspend cable trays, typically made of steel or stainless steel, and must comply with standards such as DIN EN 61537, ANSI/NFPA 70, and ASTM specifications.

Materials and Construction

Cable tray hangers are generally constructed from steel or stainless steel, with various galvanization or coating options to enhance corrosion resistance, especially in industrial or outdoor environments . They are designed to support the weight of cable trays and the cables they carry, ensuring mechanical stability and safety.

Types of Hangers

Common types of cable tray hangers include:

• Wall brackets: Fixed to walls to support horizontal tray runs .
• Suspended supports: Rods or straps from ceilings to hold trays at a required height .
• Center suspensions: Support trays from a central point, often used for long spans .
• Stand-off brackets: Fully slotted for on-site adjustment, allowing flexibility in tray width and positioning .

Design and Load Considerations

Hangers must be selected based on:

• Tray type: Ladder, trough, solid bottom, or channel trays .
• Load capacity: Must accommodate the combined weight of the tray and cables.
• Span and spacing: Determined by tray type, material, and load; typical spacing ranges from 1.2 m to 3 m for ladder trays.
• Environmental factors: Exposure to moisture, chemicals, or temperature extremes may require specific coatings or stainless steel construction .

Installation Features

• Adjustability: Many hangers are slotted or feature adjustable risers to allow precise alignment and leveling .
• Fastening methods: Can include nuts and bolts, or fast-fit systems like Swiftclip for quicker installation .
• Compliance: Hangers and supports must meet relevant standards such as ANSI/NFPA 70, ASTM A123/A653/A1011/A1008/B633, and NEMA VE 1 for metallic cable tray systems .

Accessories

Hangers may be used in conjunction with:

• Mounting plates for junction boxes or devices .
• Barrier strips, covers, or cable protection rings to enhance safety and organization .
• Fittings such as bends, tees, and risers to accommodate changes in routing direction or elevation .

Summary

Cable tray hangers are critical components in cable management systems, providing secure support and alignment for trays. Proper selection involves considering material, load, span, adjustability, and compliance with standards, ensuring safe and efficient installation in industrial, commercial, or infrastructure projects .