Cable tray clamps are designed to securely hold cable trays to structural supports, and can be fabricated or selected based on tray type, load requirements, and installation environment.

Types of Cable Tray Clamps

1. Hold Down Clamps (Z-Clamps): Used to secure trays directly to supporting structures, ideal for GRP or ladder-type trays .
2. Beam Clamps (C-Clamps): Attach trays to I-beams, wide flange beams, or angles without drilling, supporting loads up to 400 lbs .
3. Grounding Clamps: Made from copper alloy with tin plating, used to hold single cables while providing electrical grounding .
4. Snap Track Hold Down Clamps: Designed for channel trays, installed at midpoints or anchor points to allow thermal expansion .

Materials and Fabrication

• Common Materials: Steel, stainless steel, aluminum, or copper alloys depending on load, corrosion resistance, and electrical requirements .
• Surface Treatments: Galvanization, tin plating, or powder coating to improve corrosion resistance .
• Custom Fabrication: Clamps can be made by cutting and bending metal strips, welding or bolting components, and adding bolts, nuts, and washers for secure attachment .

Installation Guidelines

• Support Placement: Clamps should be installed at structural points such as beams, walls, or ceilings, ensuring the tray is level and secure .
• Load Considerations: Ensure clamps are rated for the weight of the tray and cables; heavy-duty clamps can handle up to 400 lbs .
• Thermal Expansion: Use expansion guides or mid-span clamps to allow longitudinal movement and prevent stress on trays .
• Attachment Methods: Depending on the clamp type, attach via set screws, bolts, or field-drilled holes into the tray and mounting surface .

Practical Tips

• Use two clamps per side rail for stability on Snap Track or similar trays .
• For solid bottom trays, consider drilling weep holes to prevent water accumulation if installed outdoors .
• Select clamps compatible with tray type (perforated, ladder, or solid) and environmental conditions, including chemical exposure or humidity . By following these guidelines, you can either fabricate custom cable tray clamps or select pre-made clamps that ensure secure, safe, and durable cable tray installations in industrial or commercial settings.