How to make a 90-degree angle in a cable tray

A 90-degree cable tray bend can be achieved using either pre-fabricated elbow fittings or by fabricating a mitered bend from a straight tray. Methods for Creating a 90° Bend1. Fabricated (Mitered) Bend: This method involves cutting and bending a straight cable tray to form a 90-degree angle.

The typical process includes marking the center line, making two 45-degree cuts on the tray sides, creating V-notches on the base, bending the tray to close the cuts, and securing the joint with bolts or connecting plates. Cold galvanizing spray is applied to exposed metal to prevent rust (YouTube guide ). 2.

Pre-

Manufactured 90° Elbows: Pre-made metal elbows are available in various sizes (e.g., 60x100mm, 60x200mm, 60x300mm) and are designed for simple installation. The trays are inserted into the elbow at the connection points and secured with screws. These fittings are often galvanized and certified for fire resistance and safety standards (Ekabel24 ).

3. Perforated Horizontal Elbows: Some manufacturers provide powder-coated perforated steel elbows that allow airflow and cooling of cables, reducing overheating risks. These elbows can be installed without cutting or reconnecting the tray, offering flexibility and adaptability for different layouts (Youmats ).

4. Vertical Angle Adjustments: For vertical orientation changes, elbow joints can be pushed inside the tray and attached with screws, allowing adjustments from -90° to +90° (Meka ).

Calculations for Fabrication

To make precise bends, formulas can be used to determine the size of cut-out sections. For example, a 600mm wide tray can be divided into two 45° cuts or multiple smaller angles to achieve a smooth 90° bend. The cut-out size is calculated by dividing the tray width by the number of angle segments (MathIsFunForum ).

Installation Tips

Ensure accurate measurement and marking before cutting. Use proper cutting tools such as angle grinders or hacksaws. Drill and bolt the joints securely; use connecting plates for larger trays.

Apply rust protection to exposed metal. For pre-fabricated elbows, simply insert trays and tighten screws. Using these methods ensures a clean, safe, and durable 90-degree cable tray installation, whether horizontal or vertical, solid or perforated.