Installation of fire-resistant cable trays in Iran

Fireproof cable trays in Iran should be installed using corrosion-resistant materials, proper support systems, and certified fire protection coatings or tapes to ensure safety and compliance with international standards.

Material Selection and Tray Types

For fireproof cable tray installations, material choice is critical. Indoor installations typically use painted steel or galvanized trays, while outdoor or high-humidity environments require hot-dip galvanized steel, stainless steel, aluminum alloy, or fiberglass-reinforced plastic trays to resist corrosion and environmental damage. The tray width and thickness must accommodate the number and weight of cables, ensuring mechanical strength to prevent deformation under full load.

Fireproofing Methods

Fireproofing can be achieved using fire-resistant coatings, tapes, or wraps. Products like FLAMMOTECT-A coating and DG-CR 0. 7 fire protection tape form a protective shield around cables, preventing flame propagation and maintaining cable functionality during a fire.

Fireproofing should also include firestopping at wall and slab penetrations, using fire-rated boards, mineral wool, or firestop mastic to seal gaps around trays and cables. Gaps should be minimal, and backing plates may be required for large openings.

Installation Procedure

Route Planning: Align cable tray routes with the building structure, avoiding unnecessary crossings and maintaining the shortest, straightest path. Segregate power and signal cables to reduce interference. Support and Fixing: Use threaded rods, 'L' angles, or slotted 'C' channels to support trays.

Maximum spacing is typically 1. 2–3 meters depending on tray type to prevent sagging. Trays should be self-supporting and capable of carrying the design load, often 100 kg/m.

Tray Layout: Install trays horizontally where possible, under flooring or walkways. Vertical or edgewise installations require additional cable fastening using stainless steel strips. Cable Installation: Lay cables flat in horizontal trays, securing them in groups every 2–3 meters.

For vertical trays, fix each cable individually with stainless steel strips. Covers and Protection: Provide covers in areas with high mechanical risk. Covers should match tray material and be securely clipped.

Inspection and Testing: Inspect all materials on-site for compliance with approved submittals. Ensure proper documentation, tools, and equipment are available before installation.

Compliance and Safety

Ensure that all installations meet local electrical codes and international standards such as NEMA VE1/VE2 or ARAMCO guidelines. Fireproof cable trays should maintain power and communication reliability during fire events, and all penetrations must be sealed to prevent fire spread. By following these guidelines, fireproof cable tray installations in Iran can achieve high safety standards, durability, and operational reliability in industrial, commercial, and infrastructure projects.