45-degree angle of the side of the cable tray

A 45-degree bend in a cable tray can be achieved by either cutting two 22.5° mitered sections or using a pre-fabricated 45° tray fitting.Cutting a 45-Degree Bend

To create a 45° bend manually, you typically use a mitered joint:

• Step 1: Measure and Mark – Draw a perpendicular line across the width of the tray.
• Step 2: Calculate Cut Angle – Divide the total bend angle in half. For a 45° bend, each tray section is cut at 22.5° from the perpendicular line.
• Step 3: Cut the Tray – Use a protractor to mark the 22.5° angle and cut with an angle grinder or suitable metal cutting tool.
• Step 4: Deburr and Smooth – Remove sharp edges to protect cables and ensure safety.
• Step 5: Join Sections – Align the two cut pieces so the cuts face opposite directions, forming a smooth 45° bend. Secure with appropriate connectors or hardware .

Using Pre-Fabricated 45° Bends

For convenience and precision, pre-fabricated 45° bends are available:

• Designed for specific tray widths (e.g., 450 mm heavy-duty trays).
• Made from durable materials like pre-galvanized steel or stainless steel.
• Include integrated couplers for quick installation and alignment.
• Ensure smooth directional changes without manual cutting or mitering .

Calculating Bend Dimensions

If you need to calculate the exact cut or offset:

• Use the centerline radius of the tray bend to determine arc length.
• For offset bends, the straight-line distance between elbows can be calculated using trigonometry, multiplying the vertical offset by the cosecant of the bend angle .
• For a 100 mm wide tray, the miter cut from the centerline for a 45° bend would be half the width multiplied by tan(22.5°), giving the material to remove for the lip overlap .

Tools and Safety

• Tools: Measuring tape, protractor, square, angle grinder, metal file.
• Safety: Wear gloves, safety glasses, and ear protection. Always deburr edges to prevent cable damage and personal injury . By following these methods, you can achieve a precise and safe 45-degree bend in cable tray installations, either manually or using pre-fabricated fittings.