Galvanized flat iron for cable trays

Galvanized flat iron connections are used to join cable tray sections securely, providing structural support and corrosion resistance in both indoor and outdoor installations.

Material and Standards

Galvanized flat iron used for cable tray connections is typically made from structural steel that is either pre-galvanized (mill galvanized) or hot-dip galvanized after fabrication. Pre-galvanized steel meets ASTM A653 SS, Grade 33, coating designation G90, while hot-dip galvanized steel follows ASTM A123 for zinc coatings, ensuring long-term corrosion protection . Covers and splice plates for these connections must also be hot-dip galvanized after fabrication to prevent damage to cables and maintain safety .

Types of Connections

Flat iron connections are commonly used as splice plates or joining brackets to connect two cable tray sections in a straight line or at angles. They can be:

• Straight connectors: Join two trays in a linear configuration.
• Clamp connectors: Secure trays after bending or for adjustable alignment.
• Splice plates: Flat iron plates bolted across tray ends to maintain structural integrity . These connectors are designed to handle the mechanical load of the cable trays and maintain alignment, especially in ladder, perforated, or solid-bottom trays .

Installation Considerations

• Ensure that all flat iron connectors are galvanized to match the tray material for consistent corrosion resistance.
• Use bolts and nuts compatible with galvanized steel to prevent galvanic corrosion.
• Verify that the connector dimensions match the tray width and thickness.
• For hot-dip galvanized trays, inspect and remove any excess zinc or icicles before installation to avoid cable damage .
• Follow NEMA VE 2 guidelines for proper installation and spacing of supports and connectors .

Applications

Galvanized flat iron connections are suitable for:

• Indoor and outdoor industrial environments with high cable density.
• Commercial buildings, hospitals, and offices where structural integrity and corrosion resistance are critical.
• Heavy-duty cable trays requiring robust support for long spans or high loads . By using properly galvanized flat iron connections, cable tray systems maintain mechanical strength, alignment, and long-term durability, ensuring safe and reliable cable management.