Material Selection Essentials
The framework of a ladder-type cable tray acts like a human spine; material choice directly impacts overall load-bearing capacity. Two mainstream options are common:
Galvanized steel: Recommended thickness is at least 1.2mm with a coating weight exceeding 120g/m²; suitable for humid environments.
Aluminum alloy: 6063-T5 is the preferred grade; wall thickness should be at least 1.5mm; 40% lighter than steel.
Rung spacing: 300mm spacing is recommended for power cables, while 400mm is acceptable for fiber optic cables.
Smart Structural Design
Effective design ensures the cable tray is both sturdy and material-efficient. Three key points include:
Ladder angle: A 75° angle between the side rail and the base enhances bending resistance by 20%.
Connection method: Snap-fit connections are three times faster to install than bolted ones and are less prone to loosening.
Edge treatment: A rolled-edge design prevents cable abrasion and reduces the risk of insulation damage.
Manufacturing Details Determine Quality
These production techniques dictate the final quality:
Welding points undergo pickling followed by hot-dip galvanizing, extending rust-prevention life by 8 years.
Stamping dies are polished every 500 strokes to ensure smooth, clean edges.
Finished products must pass a 20kg concentrated load test; a deformation of less than 1.5mm is required for compliance.
