After the cable tray is processed and formed, its cross-sectional shape is uniform, free from defects such as bending, distortion, cracks, and irregular edge margins. Regardless of the type of Fireproof Cable Tray, it must comply with the national standards for cable trays.

Fireproof coating is a high-efficiency maintenance product for steel structures. It is made of polymer synthetic resin as the film-forming material, supplemented with flame retardants, foaming agents, carbonizing agents, and high-temperature refractory materials. Under high-temperature conditions, the coating exhibits continuous foaming and expansion to form a flexible sponge-like carbonized insulation layer, preventing load-bearing steel structures from rapid softening, deformation, or drastic strength loss due to high-temperature flames. The coating of external wall fireproof paint shall be uniform, glossy, and free from obvious color differences.

Fireproof Cable Trays

Standards for Fireproof Cable Trays:Fireproof cable trays must be designed and manufactured in strict accordance with national standards for fireproof cables. The minimum thickness of the fireproof layer shall be ≥ 1mm, and the fire resistance rating shall be no less than 30 minutes—these are the basic performance requirements for the fireproof paint of general fireproof cable trays. The base material of fireproof cable trays is steel, with an outer layer coated with fireproof materials.

Cable trays should preferably be made of steel, non-combustible, or flame-retardant materials. Fireproof cable trays adopt a steel shell with double-layer fireproof covers and built-in inorganic fireproof trough boxes. The thermal insulation layer has a uniform thickness of 25mm, and the double-layer covers facilitate ventilation and heat dissipation. The interior is sprayed with fireproof coating, which expands when exposed to fire. During the 60-minute fire resistance test, the cables remain undamaged, and the tray maintains excellent structural support.