Fireproof cable trays in Lebanon should be installed following international standards, using appropriate materials, fireproofing techniques, and proper layout to ensure safety and compliance.

Planning and Layout

Proper route planning is essential. Cable trays should follow the shortest and straightest path, avoiding unnecessary crossings or detours, and should be coordinated with the building structure. Power and signal cables must be segregated using dedicated trays to minimize electromagnetic interference. Openings for cable trays should be correctly sized, typically 100mm larger than the tray dimensions, to allow effective fire sealing and installation of fireproof materials .

Tray Types and Materials

• Indoor installations: Painted steel or galvanized trays.
• Outdoor installations: Hot-dip galvanized or stainless steel trays.
• Corrosive or high-humidity environments: Aluminum alloy or fiberglass-reinforced plastic trays . Local suppliers in Lebanon, such as SFSP Lebanon, provide trays and accessories compliant with BS EN 61537, NEMA, and CENELEC EN 50173-1 standards, available in pre-galvanized, hot-dip galvanized, stainless steel, and aluminum .

Fireproofing Measures

To ensure fire resistance:

• Steel Plates: Use 4mm thick steel plates, extending 200mm beyond tray dimensions, treated with anti-rust paint and fireproof coating .
• Fire Blocking Materials: Place in layers to create a dense barrier, filling gaps with fireproof mortar for uniform sealing .
• Firestop Products: UL-listed firestop pillows, moldable putty, and intumescent caulks (e.g., 3M FSP-SLP-M or IC 15WB Caulk) can be used to seal openings and prevent fire and smoke spread .
• Mortar and Boards: Ensure even application of fireproof mortar and secure fixing of fireproof boards to maintain integrity and aesthetics .

Installation Best Practices

• Ensure mechanical strength of trays to support full cable load.
• Maintain continuous airflow in basket trays to prevent overheating.
• Use proper support systems such as strut channels, clamps, and hangers to secure trays .
• Verify that all fireproofing materials are densely packed and properly layered to prevent gaps that could compromise fire safety .

Compliance and Standards

Installation should comply with local and international standards, including BS EN, NEMA, and ISO/IEC cabling standards, ensuring both safety and long-term maintainability . By following these guidelines, fireproof cable trays in Lebanon can achieve optimal fire resistance, structural integrity, and compliance with safety regulations, protecting both personnel and infrastructure.