Distance of cable tray construction hangers

Cable tray hangers should generally be spaced no more than 1.5 to 3 meters apart, depending on tray type, material, and load.

General Guidelines

For horizontal cable tray runs, hangers or supports are typically installed at intervals of 1.5 meters (5 feet) for standard loads, though some sources allow up to 2 meters for vertical runs and 2–3 meters for steel trays under light loads . Ladder-type trays, which support heavy power cables, may require closer spacing, while wire mesh or trough trays can allow slightly longer spans depending on cable weight and environmental factors . Key points for support placement:

• Corners, bends, and T-junctions: Install hangers on each side symmetrically to prevent stress on cables .
• Long spans: For trays exceeding 30 meters, additional supports are required to prevent sagging .
• Vertical runs: Supports should be fixed to the building structure at intervals preferably less than 2 meters .
• Cable securing: Cables should be fastened at the start, end, and every 3–5 meters along horizontal runs, and every 1.5 meters along vertical runs .

Material Considerations

• Aluminum trays: Require closer hanger spacing (typically 1.5–2 meters) due to lower stiffness .
• Steel trays: Can span 2–3 meters depending on load and design .
• Stainless steel: Recommended in corrosive or high-humidity environments, with spacing adjusted according to load and safety factors .

Safety and Compliance

• Hanger rods should be at least 8 mm in diameter for stability .
• Supports must withstand the maximum anticipated load, including cable weight, environmental factors, and accidental impacts .
• Compliance with NEC Article 392 or BS 7671 ensures proper mechanical support and fire safety .
• Fire-resistant cable supports are required for all cable types to prevent premature failure .

Summary

The typical maximum distance between cable tray hangers is:

• Horizontal runs: 1.5–2 meters (5–6.5 feet)
• Vertical runs: up to 2 meters (6.5 feet)
• Steel trays under light load: up to 3 meters (10 feet) Always verify with manufacturer specifications and consider load, tray type, and environmental conditions to ensure safety and compliance .