Installation of fiberglass cable trays at corners

Fiberglass cable tray corners should be installed by properly preparing the tray, supporting the corner, aligning the sections, and securely fastening with compatible hardware while sealing any cut or drilled surfaces.Preparation

Before installation, inspect all fiberglass tray components, including corners, supports, connectors, and fasteners, to ensure they are free from cracks, delamination, or broken edges. Review construction drawings to determine the tray route, corner angles, installation height, and support spacing. Pre-measurements are essential for complex environments such as elevated supports, underground shafts, or chemical plant areas to design bends, ramps, and T-junctions accurately .

Cutting and Drilling

If field adjustments are required, cut fiberglass using a circular power saw with an abrasive cut-off wheel or a fine-toothed hacksaw (24–32 teeth per inch). Drill using standard twist drills as for hardwood. Always support the tray firmly during cutting or drilling to prevent chipping. After any cut or drilled surface, seal with a compatible resin to maintain structural integrity and prevent moisture ingress .

Support and Alignment

Install supports first, which can be wall-mounted, column-mounted, or suspended, depending on load requirements. Typical support spacing for fiberglass trays is 1.5 to 2 meters. Ensure that the corner fitting is properly aligned with the adjoining tray sections. The splice or joint should ideally be located at a quarter span of the support distance to distribute load evenly .

Fastening

Use the recommended hardware and torque specifications. A snug torque of 3–4 ft.-lbs. is generally sufficient for threaded rod nuts. Ensure all fasteners are fully engaged and that the corner fitting is securely clamped to the tray sections. Avoid over-tightening, which can damage the fiberglass material .

Final Checks

After installation, verify that the corner is level, properly aligned, and free from gaps. Confirm that the load-bearing capacity of the corner and tray matches the cable weight to prevent deformation or loosening. Ensure that all fasteners are tight and that any exposed cut or drilled surfaces are sealed . By following these steps, fiberglass cable tray corners can be installed safely and effectively, maintaining the durability and corrosion resistance of the GRP/FRP system.