Spacing of cable tray fixing angle iron brackets

The typical spacing for angle iron brackets supporting cable trays ranges from 1.5 to 3 meters for horizontal runs, depending on tray type, load, and environmental conditions.Horizontal RunsFor standard horizontal cable tray installations, support brackets are generally spaced between 1.5 m and 3 m apart. The exact distance depends on the tray material, width, and the total weight of the cables being supported. Heavier cables or wider trays require closer spacing to prevent sagging and maintain structural integrity . Splice plates or tray joints should also be supported by brackets to avoid stress at connection points .Vertical RunsFor vertical installations, the spacing is typically reduced compared to horizontal runs. Vertical support brackets are often placed every 2–3 meters, but for long vertical runs exceeding 32 meters, strain relief sections should be incorporated, such as short horizontal offsets of at least 1 meter to prevent excessive tension on the cables . For extremely long vertical runs (over 100 meters), additional tension-relieving measures are recommended.Angled or Sloped RunsWhen cable trays are installed at an angle greater than 30° from the vertical, horizontal support spacing guidelines can be applied. For angles less than 30°, vertical spacing rules should be followed . At bends or changes in direction, brackets should be installed on both sides of the bend to maintain cable integrity and prevent damage.Additional ConsiderationsCable type and diameter: Larger or heavier cables require closer support spacing.Environmental factors: Wind, snow, or vibration may necessitate reduced spacing.Flexible systems: For J-hanger or other flexible supports, calculations should be made to limit deflection, typically allowing a 2% initial offset .Compliance: Follow relevant standards such as BS EN 61537 or BS 6946 for cable tray systems . By adhering to these spacing guidelines, angle iron brackets will provide adequate mechanical support, prevent cable sagging, and ensure long-term reliability of the cable tray system.