Fireproof partition requirements for cable tray rooms

Fireproof partitions in cable tray rooms must use non-combustible materials, meet minimum thickness and fire resistance standards, and be properly positioned and secured to prevent fire spread.Material RequirementsFireproof partitions should be made of non-combustible materials such as gypsum board, mineral wool board, or aluminum-plastic board to ensure effective fire resistance . The materials must maintain high temperature stability, resisting burning, deformation, or cracking under fire conditions .Thickness and DimensionsMinimum thickness: 10 millimeters to ensure adequate fire resistance .Width: Should be at least equal to the width of the cable tray or bridge to fully block fire propagation .Positioning: Install partitions at least 100 millimeters away from the edge of the cable tray to maximize fire containment .Fire Resistance RatingsFire-blocking sections must have a fire resistance limit of at least 1 hour, in line with national standards such as GB23864 .The fire resistance of partitions should not be lower than the fire resistance of the building components they penetrate, such as walls or floor slabs .Installation GuidelinesPartitions must be firmly fixed to the cable tray using appropriate fasteners to ensure stability during operation .Observation holes can be included to monitor the internal condition of the cable tray without compromising fire protection .For openings in walls or slabs, use fire-resistant backing plates, firestop packs, or firestop mastic to seal gaps around cable trays, ensuring no visible cracks or voids .The gap area between firestop packs and cables should not exceed 1 cm², and packing thickness should be at least 24 cm .Maintenance and InspectionFireproof partitions should be regularly inspected and maintained to ensure integrity and effectiveness over time .Any damage, deformation, or gaps must be repaired promptly to maintain fire safety compliance .Additional ConsiderationsFireproof partitions should be compatible with environmental conditions, including potential water exposure or rodent damage .Ensure that partitions do not interfere with cable maintenance or routing, maintaining accessibility while providing fire protection . By following these requirements, cable tray rooms can achieve effective fire containment, protect electrical systems, and comply with national fire safety standards.