Vertical Shaft Cable Tray Manufacturing Process

Vertical shaft cable trays are produced and installed using methods that ensure safe, efficient cable management in vertical applications, combining material preparation, hoisting, and secure fixing.

Production Methods

There are three main production methods for cable trays:

1. Roll Forming Line: This is the most widely used method for steel cable trays. It involves decoiling steel sheets (galvanized or cold-rolled), roll forming them into tray shapes, cutting to length, and performing surface treatments such as galvanization or powder coating to enhance corrosion resistance .
2. Press Brake Bending: This method uses press brakes to bend steel sheets into tray profiles. It is suitable for custom or smaller production runs and allows precise shaping of bends and angles .
3. Extrusion: Typically used for aluminum or polymer trays, extrusion produces continuous tray sections with consistent cross-sections. This method is ideal for lightweight, corrosion-resistant applications .

Vertical Shaft Installation Process

Installing cable trays in vertical shafts requires careful handling to prevent cable damage and ensure safety:

1. Cable and Hoist Preparation: Cables are initially bound to steel wire ropes and lowered into the shaft using stabilizing hoists or chain blocks. This prevents uncontrolled rotation and tangling during descent .
2. Sequential Hoisting and Support: Multiple lifting devices are fixed along the shaft height to support the cable weight. Hoists lift the cable incrementally, balancing the load so the steel wire rope does not bear the full weight .
3. Separation and Fixing: After lowering, the cable is detached from the steel wire rope. The rope is removed, and the cable is fixed to brackets or the inner wall of the shaft, typically from bottom to top. This method reduces labor, prevents accidents, and improves installation efficiency .
4. Support and Spacing: Proper spacing and securing of cables are maintained using approved fittings, spring knots, and brackets. Minimum bend radii are observed to prevent cable damage .

Material and Safety Considerations

• Materials: Steel (galvanized or stainless), aluminum, or polymer trays are selected based on load, corrosion resistance, and environmental conditions .
• Safety: Using pre-installed hoists and avoiding manual separation of cables and ropes reduces the risk of falls and injuries in confined vertical spaces .
• Standards Compliance: Installation follows international standards such as NEC Article 392, ensuring proper grounding, load capacity, and fire safety .

Summary

The production and installation of vertical shaft cable trays combine precision manufacturing (roll forming, bending, or extrusion) with careful vertical handling. Using hoists, sequential support, and proper fixing techniques ensures efficient, safe, and durable cable management in high-rise or underground vertical shafts. This approach minimizes labor, reduces risk, and maintains cable integrity throughout the installation process.