How to bend fiberglass cable trays

Fiberglass cable trays can be bent using pre-fabricated horizontal or adjustable bends, designed to maintain structural integrity while routing cables efficiently. Types of Bends1. Horizontal Adjustable Bends (HAB): These allow for customizable routing of fiberglass cable trays, enabling installers to adjust the angle to fit specific layouts without cutting or fabricating new sections.

2. Fixed 90-Degree Horizontal Bends: Pre-fabricated 90-degree bends are available for standard routing needs. These bends are designed with specific horizontal radii to ensure the tray maintains its load capacity and mechanical strength.

Material Considerations

Fiberglass cable trays are made from pultruded fiberglass reinforced plastic (FRP), typically using polyester or vinyl ester resin systems. Key properties include: High strength-to-weight ratio: Fiberglass trays are lighter than steel but maintain comparable load capacity. Corrosion resistance: Resistant to acids, bases, and high humidity, making them suitable for harsh environments.

Non-conductive and non-magnetic: Reduces electrical hazards and interference with sensitive equipment.

U

V and chemical protection: Surface veils and UV inhibitors protect against sunlight and chemical degradation.

Bending Guidelines

Use pre-fabricated bends whenever possible: Adjustable or fixed bends prevent stress concentrations that could compromise the tray. Consider the bend radius: The horizontal radius of the bend should match manufacturer specifications to avoid cracking or deformation. Environmental factors: Elevated temperatures or exposure to corrosive chemicals can reduce the mechanical properties of fiberglass, so design for actual operating conditions.

Installation support: Ensure proper support at bends to maintain alignment and prevent sagging, especially for long spans or heavy cable loads.

Summary

Fiberglass cable trays should not be manually bent on-site due to the risk of structural damage. Instead, use pre-fabricated horizontal or adjustable bends designed for the tray system. Always account for resin type, environmental conditions, and load requirements to ensure safe and durable cable routing.

Proper installation and adherence to manufacturer specifications will maximize the lifespan and performance of the fiberglass cable tray system.