Description of fire-resistant characteristics of fire-resistant cable tray
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Fire-resistant cable trays are suitable for laying power cables up to 10 kV, as well as control cables, lighting wiring, and other overhead cables in indoor and outdoor cable trenches and tunnels. However, many people may not be familiar with their fire-resistant properties. The steel skeleton is primarily machined from high-quality cold-rolled steel, resulting in a high load-bearing capacity and a long service life. The cross-section of the steel skeleton is neat and free of burrs and sharp corners, and the grooves are smooth and flat without sharp protrusions. After processing, the cross-section is uniform, free of defects such as bends, twists, cracks, and edges.
Fire-resistant cable trays are familiar to us. Let's take a look at their performance:
Fire-resistant cable trays are suitable for laying power cables up to 10 kV, as well as control cables, lighting wiring, and other overhead cables in indoor and outdoor cable trenches and tunnels. However, many people may not be familiar with their fire-resistant properties.
The steel frame is primarily manufactured from high-quality cold-rolled steel sheets through machining, resulting in high load-bearing capacity and a long service life. The steel frame's cross-section is clean and free of burrs and sharp corners, and the grooves are smooth and flat without sharp protrusions. After processing, the cross-section is uniform and free of defects such as bends, twists, cracks, and edges.
Fireproof panels are primarily made from siliceous and calcium materials, mixed with a certain proportion of fiber materials, lightweight aggregates, adhesives, and chemical additives, and manufactured using advanced autoclaving technology.
Fire-retardant coatings are a highly effective steel structure protection product. They are formulated with a carefully selected polymer synthetic resin as the film-forming agent, flame retardants, foaming agents, carbonizing agents, and high-temperature refractory materials. Under high-temperature conditions, the coating undergoes a continuous foaming and expansion effect, forming a flexible, sponge-like carbonized insulation layer. This prevents the supporting steel structure from softening and deforming rapidly due to the intense flames, preventing a sharp drop in strength. The exterior fire-retardant coating must be applied evenly, smoothly, and without noticeable color variation. The interior layer should be reinforced with fire-resistant board or sprayed with fire-resistant coating, ensuring that the board is securely fastened to the bridge.
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