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Dimensions for cable tray bends

Standard cable tray bend dimensions vary by angle (45° or 90°) and tray width (typically 50–900 mm), with manufacturers like Metsec providing detailed size tables for light, medium, and heavy‑duty trays. These dimensions include specific part codes and availability per width category, such as 50 mm to 900 mm for 90° bends and 50 mm to 300 mm for adjustable bends.Overview of Cable Tray Bend Dimensions

Cable tray bends are manufactured in standard angles—most commonly 45° and 90°—and are sized according to tray width and duty class. Dimensions differ depending on whether the tray is light, medium, or heavy duty.

Key Bend Types
  • 90° Flat Bends
  • 45° Flat Bends
  • Adjustable Flat Bends (30°, 45°, 60°, 75°, 90°)

These bends are used to route cable trays around obstacles or change direction horizontally.

Standard Dimensions (Based on Metsec Data)

The following summarizes available widths and duty classes for flat bends:

90° Flat BendsTray Width (mm)Light DutyMedium DutyHeavy Duty50YesYesNo75YesYesYes100YesYesYes150YesYesYes225YesYesYes300YesYesYes450NoYesYes600NoYesYes750NoNoYes900NoNoYes45° Flat BendsTray Width (mm)Light DutyMedium DutyHeavy Duty50YesYesNo75YesYesYes100YesYesYes150YesYesYes225YesYesYes300YesYesYes450NoYesYes600NoYesYes750NoNoYes900NoNoYesAdjustable Flat Bends (30°–90°)

Available only for medium and heavy duty trays up to 300 mm width.

Bend Radius and Dimensional Considerations

Beyond physical bend fittings, cable tray bends must comply with NEC, IEC, and NEMA bend‑radius standards, which define minimum centerline radius (CLR) to prevent cable damage. Typical standard CLR sizes include 300 mm, 600 mm, and 900 mm.

Key parameters used in bend dimension calculations include:

  • Centerline Radius (R)
  • Chord Length (C)
  • Arc Length (S)
  • Setback (B)
  • Offset Travel (L)

These values are essential when designing custom bends or verifying manufacturer fittings.

When to Use Bend Calculators

Tools such as the Cable Tray Bend Calculator allow engineers to compute:

  • Arc length
  • Setback
  • Offset geometry
  • Compliance with cable bend radius limits

This is especially useful for non‑standard angles or complex routing.

Summary

Cable tray bend dimensions depend on tray width, duty class, and bend angle, with standard offerings ranging from 50 mm to 900 mm widths and 45°/90° or adjustable angles. Manufacturers provide detailed dimension tables, and engineering calculators help ensure compliance with NEC/IEC bend‑radius requirements.

Dimensions for cable tray bends

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