Cable trays can change direction vertically or horizontally using 90-degree bends, available in rigid, flexible, and perforated designs for industrial and commercial applications.

Types of 90-Degree Cable Tray Bends

1. Vertical Riser Bends: These allow the cable tray to climb or descend at a 90-degree angle. They are commonly used to transition cables between different levels or floors. Vertical riser bends are available in perforated or solid steel, often zinc-plated for corrosion resistance, and can support heavy loads while protecting cables from mechanical damage and heat . Examples include:

• External riser bends: Flexible and can conform to various shapes without cutting or reconnecting .
• ASP 90° vertical up-turn bends: Standard 24-inch bend radius for coaxial cable installation, available in widths of 12", 18", and 24" .

2. Horizontal 90-Degree Bends: These are used to change the cable tray direction along the same plane. They are typically rigid steel or carbon steel with electroplated finishes for durability . Examples include:

• Horizontal E-Bend Sections: cULus classified, available in multiple widths (12", 18", 24") and finishes, suitable for routing communications or power cables .

3. Flexible 90-Degree Bends: These bends are made from heavy-duty flexible materials, allowing smooth transitions without sharp corners, reducing stress on cables and simplifying installation . They are ideal for complex routing where rigid bends may not fit.

Material and Construction

• Steel (galvanized or zinc-plated): Provides mechanical strength and corrosion resistance .
• 304 Stainless Steel or PVC wire mesh: Durable and suitable for environments requiring chemical or moisture resistance .
• Perforated designs: Allow ventilation and heat dissipation, reducing the risk of overheating.

Installation Considerations

• Ensure the bend radius is sufficient for the cable type to prevent damage. For example, coaxial cables may require a 24-inch bend radius .
• Supports and covers are often sold separately and should be installed to maintain structural integrity and cable protection .
• Couplers, screws, and nuts are typically not included and must be ordered separately .
• Flexible bends can be adjusted on-site to fit specific routing requirements, reducing the need for custom fabrication .

Applications

• Industrial plants, commercial buildings, and data centers where cables need to transition between floors or around obstacles.
• Environments requiring corrosion resistance, mechanical protection, and heat dissipation.
• Situations where cable integrity and ease of installation are critical, such as high-density communication or power systems.

By selecting the appropriate 90-degree bend type, material, and size, cable trays can safely and efficiently climb or change direction while maintaining cable protection and system reliability .