How to draw lines on a circular cable tray

To draw lines on a circular cable tray, you need to define the tray type, specify the bend radius, and use either CAD/BIM tools or manual drafting to create straight and curved segments along the circular path.

Using CAD/BIM Software

1. Select the Cable Tray Type: Choose the appropriate cable tray type (ladder, perforated, or solid bottom) and size. In Revit, this is done via the Type Selector, while in CADmatic, you select the type from the product database or enter it manually . 2. Specify Bend Radius and Dimensions: For circular or curved trays, define the inner radius of the curve. This ensures the tray follows the circular path accurately. In Revit, you can set the bend radius on the Options Bar before drawing . In CADmatic, the inner radius can be adjusted for curved corners and vertical corners . 3. Draw the Tray Path:

• Straight Segments: Click to specify the start point, then click along the path to create straight stretches.
• Curved Segments: The software automatically adds bends according to the specified radius. In Revit, bends are added as needed when drawing along a circular path . In Dynamo, you can script the line command to generate curves based on vertex angles . 4. Adjust Elevation and Orientation: If the circular tray is not horizontal, adjust the elevation or rotation. CADmatic allows vertical or inclined cableways by selecting a new elevation or using the Tab key for vertical segments . 5. Connect to Existing Trays: Enable automatic connection options to join the circular tray to other trays or fittings. This ensures continuity and avoids gaps or overlaps .

Manual Drafting Tips

• Use a Compass or Template: Draw the circular path first, then mark points along the circumference where straight segments will connect.
• Mark Bend Points: Determine where bends are required and draw arcs with the correct radius.
• Label and Dimension: Include leader lines and tags to indicate tray type, width, and bend radius for clarity .

Best Practices

• Maintain consistent bend radius to avoid sharp turns that can damage cables.
• Use software tools to preview the tray layout in 3D to check for clashes or interference.
• Save settings for repeated use to streamline drawing multiple circular trays . By following these steps, you can accurately draw lines on a circular cable tray, whether using CAD/BIM software or manual drafting, ensuring proper alignment, bend radius, and connectivity.