Trapezoidal fiberglass cable trays should be installed with proper support, load assessment, and secure fastening to ensure durability, safety, and corrosion resistance.

Material and Preparation

Fiberglass cable trays, also known as GRP or FRP trays, are lightweight, corrosion-resistant, non-conductive, and high-strength, making them ideal for chemical plants, coastal areas, and underground utility corridors ( ). Before installation, review construction drawings and conduct on-site inspections to determine tray routes, layer structures, installation heights, and support spacing. Ensure all tray components, supports, connectors, and fasteners are free from cracks, delamination, or defects ( ).

Support Structure

The first step in installation is mounting the support system. Supports must be designed to handle the load of the cables without causing deformation or loosening. Typical support spacing depends on tray width, cable weight, and environmental conditions. In complex environments, pre-measure bends, ramps, and T-junctions to ensure smooth cable routing ( ).

Tray Installation

1. Position the trays on the supports, ensuring alignment along the planned route.
2. Secure the trays using appropriate fasteners, ensuring that all connections are tight and the trays are flush with couplers or connectors ( ).
3. Check for level and straight runs, adjusting supports as necessary to maintain proper alignment.
4. Install covers if required, particularly in environments where dust, moisture, or mechanical protection is needed ( ).

Handling and Safety

During transport and installation, protect trays from heavy impacts, drops, and prolonged sun exposure to maintain structural integrity ( ). Fiberglass trays are lighter than steel, reducing lifting hazards, but care should still be taken to avoid bending or cracking. Use personal protective equipment when handling sharp edges or cutting trays.

Compliance and Load Considerations

Ensure the tray load capacity matches the cable quantity to prevent overloading. Follow relevant standards for cable fill, bend radius, and spacing to maintain electrical safety and mechanical stability ( ). Pultruded fiberglass trays typically meet ASTM E-84 Class 1 flame rating and ASTM D-635 self-extinguishing requirements ( ).

Final Checks

After installation, verify that all trays are securely fastened, level, and free from damage. Inspect connections, supports, and covers to ensure long-term reliability. Proper installation ensures low maintenance, corrosion resistance, and extended service life of the cable system ( ).