To construct a 30-degree inclined cable tray, multiply the tray width or offset distance by the 30° multiplier to determine the V-cut or bend dimensions.

Basic Formula

For a cable tray of width $W$ or a desired offset distance $D$, the cut size or V-notch dimension can be calculated using a multiplier specific to 30°:

Where $M$ is the 30° multiplier, typically ranging from 0.44 to 2.66 depending on the tray width and offset distance . For example:

• 50 mm tray: $50\times 0.44=22\text{mm}$
• 100 mm tray: $100\times 0.88=88\text{mm}$
• 150 mm tray: $150\times 1.33=200\text{mm}$ This gives the half-width or full-width of the V-cut needed to achieve a 30° incline.

Step-by-Step Construction

1. Measure the tray width and desired slope: Determine the horizontal run and vertical rise for the 30° incline.
2. Calculate the V-cut dimensions: Use the formula above to find the exact cut size for the tray edges.
3. Mark the tray: Draw the V-cut lines on the tray using a measuring tape or a scaled diagram .
4. Cut the tray: Use a round saw or non-ferrous cutting blade to make precise cuts.
5. Bend the tray: Fold along the V-cut to achieve the 30° angle.
6. Install supports: Space hangers according to the tray width, slope angle, and load, following standard guidelines .

Horizontal Run and Offset

To determine the horizontal run required for the inclined section:

For a 30° slope, the multiplier is approximately 2.0 for standard offsets . This ensures the tray reaches the desired height while maintaining proper alignment.

Practical Tips

• Always verify the bend radius against cable manufacturer recommendations to prevent damage .
• For field-bent trays, measure the distance along the straight tray to mark bending points accurately .
• Use SVG or scaled diagrams for direct marking to reduce errors on-site .
• Ensure hanger spacing accounts for the additional weight on sloped sections . By following these formulas and steps, you can construct a precisely inclined 30-degree cable tray that meets both structural and electrical installation standards.