100-meter fireproof cable tray thickness

For a 100-meter fireproof cable tray, a typical metal thickness ranges from 0. 8 mm to 1. 2 mm depending on load, material, and fire-resistance requirements.

Material and Thickness Considerations

The thickness of a cable tray must be selected based on the number and weight of cables, as well as the mechanical strength required to prevent deformation over long spans. For standard galvanized steel trays with fireproof ratings (e.g., E90), a material thickness of 0. 8 mm is commonly used for smaller loads, while heavier cable loads or longer unsupported spans may require 1.

0–1. 2 mm thickness. Aluminum trays may have slightly different thickness requirements due to material strength differences.

Fireproofing Standards

Fireproof cable trays must comply with standards such as DIN 4102-12: 1998 or E90 fire resistance, ensuring they maintain structural integrity for at least 90 minutes under fire conditions. Firestopping measures at slab penetrations or wall openings should include firestop packs, mineral wool, or fire-resistant boards, with packing thicknesses of at least 24 mm and tightly sealed gaps to prevent fire spread.

Installation Guidelines

Ensure the tray is level, plumb, and securely mounted on supports, with horizontal deviation ≤2 mm/m and vertical deviation ≤3 mm/m. Use splice plates and bolts to maintain mechanical continuity. Remove sharp edges or debris inside the tray to prevent cable damage.

For long runs like 100 meters, consider intermediate supports to reduce deflection and maintain fireproof performance.

Summary

For a 100-meter fireproof cable tray, 0. 8 mm thickness is suitable for light to moderate loads, while 1. 0–1.

2 mm is recommended for heavier cable loads or longer unsupported spans. Compliance with fire-resistance standards and proper installation practices is essential to ensure both mechanical and fire safety over the full length of the tray.