How to make a bend in a vertical cable tray

Vertical bends in cable trays can be made using precise measurements, bending formulas, or manual techniques with simple tools to create inside or outside elbows.

Understanding Vertical Bends

Vertical bends are used to change the elevation of a cable tray, typically forming 90° or 45° inside or outside elbows. These bends allow the tray to navigate floors, ceilings, or obstacles while maintaining proper cable support and spacing. Methods to Make Vertical Bends1.

Using Bending Formulas

For multi-layer cable trays, formulas like X. 80 or 1. 414 can help calculate the correct spacing and angles for 45° or 90° bends.

Measure the tray width and depth, then calculate the bend points to ensure smooth transitions without kinking the tray. 2. Manual Bending with ToolsA metal bar or crimping tool can be used to bend steel cable trays when a bending machine is unavailable.

Steps: Mark the bend location on the tray. Secure the tray on a stable surface. Apply gradual pressure using a bar or crimping tool to form the desired angle.

Check alignment and smooth out any sharp edges. 3.

Using Pre-

Fabricated ElbowsPre-manufactured inside or outside elbows are available for standard tray sizes and angles, which can save time and ensure accuracy. These are especially useful for tight spaces or when multiple bends are required.

Practical Tips

Maintain consistent spacing between layers in multi-layer trays to prevent cable crowding. For long radius bends, multiple smaller bends can be combined to achieve a smooth curve. Always support the tray at intervals to prevent sagging or stress on the cables.

When working in software like Revit, ensure the correct orientation is selected to insert vertical bends rather than horizontal ones. By following these methods, vertical bends in cable trays can be fabricated accurately, whether using formulas, manual tools, or pre-fabricated fittings, ensuring safe and organized cable routing.