Content of supports used in cable trays

Cable tray supports are structural elements made from steel, stainless steel, aluminum, or fiberglass, designed to securely hold cable trays using brackets, hangers, and suspension systems.

Materials of Cable Tray Supports

Cable tray supports are typically constructed from steel or stainless steel, often with galvanization or other corrosion-resistant coatings to withstand environmental and mechanical stresses . Aluminum is also used for its lightweight and corrosion-resistant properties, while fiberglass-reinforced plastic (FRP) supports are chosen for non-conductive and highly corrosive environments . The choice of material depends on factors such as load requirements, environmental conditions, and chemical exposure.

Types of Support Elements

Support elements are designed to mechanically hold cable trays and connect them to building structures such as ceilings, walls, floors, or steel girders . Common types include:

• Wall brackets: Mounted directly to walls for vertical or horizontal runs.
• Cantilever brackets: Extend from walls or beams to support trays without additional vertical supports.
• Trapeze hangers: Suspended from ceilings using threaded rods, providing support for multiple parallel trays.
• Center-span supports: Positioned under the tray to prevent sagging over long spans.
• Pendant brackets and U-profiles: Used for flexible ceiling installations and to adjust tray height or alignment .

Mounting and Accessories

Supports often work in conjunction with mounting elements such as plates, clamps, and adapters to secure trays and fittings . Accessories like splice plates, hold-down clamps, and covers enhance stability and protect cables from mechanical damage or environmental exposure. Threaded rods, spacers, and suspension brackets allow precise alignment and load distribution.

Installation Considerations

Proper support spacing is critical to prevent tray sagging and maintain cable integrity. Standards such as DIN EN 61537 and NEC Article 392 provide guidelines for maximum tray spans, load capacities, and fastening intervals . Supports must accommodate the weight of cables, environmental loads, and potential mechanical impacts while allowing for future maintenance and cable additions. In summary, cable tray supports are engineered structural components made from durable materials and configured as brackets, hangers, or suspension systems to ensure safe, stable, and code-compliant cable management in various environments .