Fireproof cable tray double-layer ladder type

Fireproof double-layer ladder cable trays provide safe, durable, and organized support for electrical and communication cables, ensuring continued operation during fire emergencies.

Overview

A double-layer ladder cable tray consists of two parallel ladder structures stacked vertically or side-by-side, allowing separation of different cable types or circuits while maintaining airflow and accessibility. When fireproofed, these trays are designed to withstand high temperatures, prevent collapse, and maintain electrical continuity for critical systems such as emergency lighting, fire alarms, and building management systems .

Materials and Fire Resistance

Fireproof ladder trays are typically made from:

• Galvanized steel or stainless steel with fire-resistant coatings
• Fiberglass reinforced polyester (FRP/GRP), which is lightweight, non-conductive, and corrosion-resistant
• Powder-coated aluminum or intumescent-coated materials for enhanced fire protection These materials are tested according to standards like EN 1363-1, ensuring that the trays can support cables during fire exposure for durations such as E60 or E90, meaning 60 or 90 minutes of fire resistance while maintaining functionality .

Design Features

• Ventilated ladder rungs allow heat dissipation and reduce smoke accumulation
• Double-layer configuration enables separation of power and data cables, reducing interference and improving safety
• Pre-drilled straight sections and fittings (tees, bends, reducers) simplify installation and allow modular expansion
• Covers (flat or peaked) provide additional protection against debris, water, and fire spread

Installation and Compliance

• Must be installed by qualified personnel following manufacturer instructions and local fire safety codes
• Fire-rated fasteners and supports are required to maintain structural integrity during fire events
• Modular design allows for easy maintenance and cable replacement without compromising fire safety

Advantages

• Ensures continuous operation of critical electrical systems during fire
• Durable and corrosion-resistant, suitable for harsh industrial environments
• Lightweight and non-conductive options reduce installation complexity and electrical hazards
• Supports long-term cable protection with design life up to 50 years for GRP systems Fireproof double-layer ladder cable trays are ideal for industrial, commercial, and high-risk environments where fire safety, cable organization, and system reliability are critical. They combine robust fire resistance, modularity, and ease of installation to protect both infrastructure and personnel.