Distance of vertical cable tray supports

For vertical cable tray runs, supports should generally be spaced at intervals of less than 2 meters (approximately 6. 5 feet), with exact spacing determined by tray type, load, and manufacturer guidelines.

Recommended Vertical Support Spacing

For vertical cable trays, the typical support spacing is preferably less than 2 meters to ensure stability and prevent excessive stress on the tray and cables. This spacing helps maintain the structural integrity of the tray, accommodates the weight of the cables, and allows for safe installation and maintenance.

Factors Affecting Support Spacing

Tray Type and Material: Heavier or deeper trays, such as 6-inch deep steel trays, may require closer spacing or additional wall/column fastenings to resist horizontal forces. Lighter trays may allow slightly wider spacing. Cable Load: The total weight of the cables in the vertical run affects support intervals.

Heavier loads necessitate shorter spacing to prevent sagging or deformation. Manufacturer Recommendations: Always consult the tray manufacturer's load capacity charts and installation guidelines, as they provide the most accurate support spacing for specific tray models. Environmental and Dynamic Factors: Consider thermal expansion, vibration, and seismic activity, which may require closer support spacing in certain installations.

Practical Guidelines

Intermediate Securing: Cables within vertical trays should be secured at the top and at intervals of approximately 1. 5 meters to prevent movement. Wall or Column Fastening: Vertical trays should be anchored to structural elements to resist horizontal forces, especially for taller runs or heavy cable loads.

Maximum Height Considerations: For self-supporting steel trays, the maximum vertical height without additional support is typically around 20 feet (6 meters), but this depends on tray depth and gauge.

Summary

While less than 2 meters is a common guideline for vertical support spacing, the exact distance should be determined based on tray type, cable weight, manufacturer specifications, and environmental conditions. Proper support ensures safety, prevents mechanical stress, and facilitates maintenance.