What kind of fixing is used for fire-resistant cable trays

Fire-resistant cable trays are secured using metallic clips, screws, anchors, and fire-rated accessories designed to prevent collapse and maintain safety during a fire.Types of FixingsMetallic Cable Clips and Cleats: Fully metallic clips, cleats, and ties are commonly used to secure cable trays and bundles, ensuring structural integrity under high temperatures and fire conditions. These fixings are suitable for both walls and ceilings and comply with standards such as BS7671 for escape routes and general installations . Concrete and Masonry Anchors: For mounting trays to concrete or masonry, fire-approved concrete screws (e.g., BTS6 series) and wall plugs are used. These fasteners are designed to maintain load-bearing capacity during a fire and are often deeper set than standard fixings to enhance fire resistance . Fire-Rated Adhesives and Sealants: In addition to mechanical fixings, fire-resistant adhesives, mastic, and firestop packs are used to seal penetrations where cable trays pass through walls or floors. These materials prevent fire and smoke spread while maintaining tray stability . Saddle Bar Spacers and Banding: Fire-rated saddle bar spacers and LSF-coated banding with pre-punched holes are used to secure multiple cables within trays. These accessories provide uniform support and prevent premature collapse during a fire .Installation ConsiderationsEnsure all fixings are level, plumb, and securely mounted to prevent deformation under load .Maintain proper spacing between supports according to cable weight and fire safety guidelines.Use fire-rated penetration seals when trays pass through walls or floors to maintain compartmentalization .Periodically inspect fixings for corrosion, mechanical damage, or coating degradation to ensure long-term fire resistance .Compliance and StandardsFire-resistant fixings should meet European Technical Approvals or local fire safety certifications. Installers should consult manufacturer guidelines and local regulations to ensure compliance with fire protection requirements . By using these specialized fixings and accessories, cable trays can maintain structural integrity during a fire, protect electrical systems, and ensure safe evacuation routes.