Cable tray support bracket angle iron dimensions

The size of angle iron brackets for cable trays depends on the tray width and load, with common options ranging from 75mm to 225mm in height and 2mm thickness for standard installations.

Standard Bracket Sizes

• 75mm brackets: Suitable for cable trays up to 75mm wide, made from 2mm thick ribbed steel, often hot-dipped galvanized for corrosion resistance .
• 100mm brackets: Designed for 100mm cable trays, typically 2mm thick pre-galvanized steel, with 3 x M10 top support holes for secure mounting .
• 150mm brackets: Suitable for 150mm trays, 2mm thick steel, providing heavy-duty support for medium-width cable trays .
• 225mm brackets: Used for 225mm trays, 2mm thick steel, offering robust support for larger cable trays .

Considerations for Selection

1. Tray Width and Load: The bracket height should match or slightly exceed the tray width to ensure stability. Wider trays or heavier cable loads may require larger or reinforced brackets .
2. Material and Finish: Galvanized or pre-galvanized steel is recommended for durability and corrosion resistance, especially in industrial or outdoor environments .
3. Mounting Type: Brackets can be used for wall, ceiling, or overhead mounting. Cantilever or angle steel supports provide strong structural integrity for fixed installations, while rod supports offer height adjustability .
4. Spacing Between Supports: Standard practice is to place supports near joints and at intervals recommended by the tray manufacturer, typically not exceeding the straight section length of the tray .

Practical Recommendation

For most standard installations:

• Use 2mm thick angle iron brackets.
• Select bracket height according to tray width: 75mm for small trays, 100–150mm for medium trays, and 225mm for large trays.
• Ensure proper mounting with M10 bolts or equivalent fasteners, and consider additional stiffening or threaded rod suspension for ceiling installations . By following these guidelines, the cable trays will be securely supported, maintaining both safety and long-term stability.