Construction Plan for Fireproof Partitions on Cable Trays

Fireproof partitions on cable trays should be constructed using non-combustible materials, properly spaced, securely fixed, and sealed to prevent fire spread while allowing inspection and maintenance.

Materials Selection

Fireproof partitions should be made of non-combustible materials such as gypsum board, mineral wool board, aluminum-plastic board, or fire-resistant coatings. The choice depends on environmental conditions, heat dissipation requirements, and durability under potential water exposure or mechanical damage . Fireproof boards and coatings are commonly used for their ease of installation and effective fire containment, while mineral wool provides high heat resistance and structural strength .

Partition Dimensions and Placement

• Thickness: Minimum 10 mm to ensure adequate fire resistance .
• Width: Equal to or greater than the cable tray width to fully block fire spread .
• Positioning: At least 100 mm from the tray edge to allow effective isolation .
• Observation Holes: Include small inspection openings to monitor internal cable conditions without compromising fire protection .

Installation and Fixing

• Partitions should be firmly fixed to the cable tray using appropriate fasteners to prevent displacement during operation .
• Ensure alignment and straightness of partitions along the tray route .
• Maintain adequate clearance between cables to allow heat dissipation and prevent overheating .

Firestopping and Sealing

• Seal all tray penetrations through walls, floors, or slabs with fire-rated materials such as firestop packs, firestop mastic, or mineral wool .
• For large openings, install a fire-resistant backing plate before sealing to ensure complete containment .
• Gaps between firestop materials and cables should not exceed 1 cm², and packing thickness should be at least 24 mm .
• Cover plates should be square, consistent in size, and painted evenly to maintain integrity and aesthetics .

Maintenance and Inspection

• Conduct regular inspections to check for corrosion, deformation, or damage to partitions and fireproof coatings .
• Clean trays and partitions periodically to maintain fire resistance and airflow .
• Replace or repair any damaged sections immediately to ensure continuous fire protection .

Integration with Cable Tray Layout

• Align partitions with the architectural design and avoid unnecessary detours or overlaps with other pipelines .
• Segregate power and signal cables using dedicated trays to reduce fire risk and electromagnetic interference .
• Use perforated or wire mesh trays where possible to improve airflow and heat dissipation . By following these guidelines, fireproof partitions on cable trays can effectively isolate fire zones, prevent fire spread, and ensure safe operation of electrical systems while allowing for maintenance and inspection .