Steel cable tray width and height

Steel cable trays typically range from 50mm to 900mm in width, 50mm to 150mm in depth, and are commonly available in 3-meter lengths, with material thickness from 1.2mm to 2.0mm depending on load requirements.

Standard Dimensions

Width: The inside usable width of steel cable trays usually ranges from 50mm to 900mm, with smaller trays used for control or data cables and larger trays for power or industrial applications . The outside width is slightly larger due to side rail thickness, which is important for wall or floor penetrations .

Depth (Side Rail Height): Depths typically range from 50mm to 150mm, controlling vertical stacking capacity and ensuring proper heat dissipation and NEC fill compliance .

Length: Most steel cable trays are manufactured in 3-meter (10-foot) sections, which balances ease of transport and installation . Some manufacturers offer longer sections, but 3 meters is standard for most projects.

Material Thickness: For structural strength, steel trays are commonly 1.2mm to 2.0mm thick, with heavier-duty trays used for larger cable loads. Hot-dip galvanization is often applied to prevent corrosion, with zinc coatings ranging from 45 to 85 micrometers .

Load and Fill Considerations

• Cable trays should be filled to no more than 40% of their capacity to allow airflow and prevent overheating .
• The tray width is determined by the number of cables laid side-by-side, while depth ensures cables remain securely held.
• For lighter data cables, thinner steel (1.2–1.5mm) is sufficient, whereas power or industrial cables may require 2.0mm steel .

Types and Configurations

Steel cable trays come in various types, including ladder, trough, and channel, each with specific width and rung spacing requirements. Ladder trays, for example, have rungs spaced typically 150mm apart, adjustable to 225mm or 300mm for fewer cables .

Summary

When selecting a steel cable tray, consider:

• Width and depth based on current and future cable volume
• Material thickness for load-bearing requirements
• Tray type (ladder, trough, channel) for cable support and ventilation
• Length for ease of installation and transport
• Corrosion protection such as hot-dip galvanization for durability .

Proper sizing ensures compliance with standards, prevents overheating, and allows for future expansion.