Article Overview
Cable Tray Tee fittings are specified by type, material, finish, dimensions, and compatibility with straight tray sections.
Cable Tray Tee Specification Sequence Table
| Parameter | Specification / Options | Notes |
|---|---|---|
| Type | Horizontal Tee, Vertical Tee | Compatible with ladder, trough, or solid-bottom trays |
| Material | Steel (Hot-Rolled, Cold-Rolled), Aluminum, Stainless Steel | Material selection depends on load, environment, and corrosion resistance |
| Finish / Coating | Hot-dip galvanized, Bare galvanized, Powder-coated, Electrodeposited zinc | Ensures corrosion protection and compliance with ASTM A123, A653, B633 |
| Width (W) | 50 mm, 70 mm, 100 mm, 120 mm, or custom | Must match the width of the connecting straight tray sections |
| Height (H) | 50 mm, 70 mm, 100 mm, 120 mm | Determines internal clearance for cables |
| Rung / Slot Spacing | 50 mm, 100 mm, or per manufacturer standard | Ensures proper cable support and ventilation |
| Bend Radius / Fitting Radius | Manufacturer-specific, typically 300–600 mm | Critical for cable bend limits and installation ease |
| Load Rating | Light, Medium, Heavy Duty | Based on cable weight and span between supports |
| Standards Compliance | ANSI/NFPA 70, NEMA VE 1 & VE 2, ASTM A123, A653, A1008, B633 | Ensures safety, quality, and regulatory compliance |
| Accessories / Connectors | Splice plates, clamps, brackets, expansion joints | Required for secure installation and continuity |
| Installation Notes | Field verification of dimensions, routing, and levels required | Contractor must survey site before layout submission |
Key Considerations
- Compatibility: Tee fittings must match the width and type of the straight tray sections to maintain structural integrity and cable support .
- Corrosion Protection: Selection of coating or finish should consider environmental exposure, such as indoor, outdoor, or chemical environments .
- Load Capacity: Ensure the tee fitting can support the combined weight of all cables routed through the branch and main runs .
- Installation Sequence: Typically, the main tray run is installed first, followed by the tee branch, with all supports and accessories installed according to manufacturer guidelines and field conditions . This table provides a comprehensive reference for specifying cable tray tee fittings in engineering, procurement, and installation documentation.
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