Selection of fire rating of FRP cable tray. Under the same specification, flame retardant cable tray is 2.2 times more expensive than steel cable tray, its service life is more than 5 times that of steel cable tray, and its weight is 30% heavier than steel cable tray The fireproof cable tray is slightly more expensive than the steel cable tray. Its service life is more than 3 times that of the steel cable tray, and its weight is basically the same as that of the steel cable tray.

一、防火阻燃桥架特点

1、 Characteristics of fireproof and flame retardant Bridge

阻燃防火桥架主要由玻璃纤维增强材料和无机黏合剂复合的防火板与金属骨架复合以及其他的防火基材组成。外层加防火涂料，阻燃防火桥架遇火后不会燃烧，从而阻隔火势蔓延，具有极其良好的防火阻火效果，又具有耐火、耐油、耐腐蚀、无毒、无污染，整体安装方便，结构合理，使用寿命长，并且美观，电缆安装在电缆桥架中，环境整洁，清扫方便。防火涂料有涂层薄、耐火极限高、粘接力强的特点。

The fire-retardant fire-proof bridge is mainly composed of fire-proof board composed of glass fiber reinforced material and inorganic adhesive, metal skeleton and other fire-proof base materials. Fire retardant coating is added on the outer layer, so that the fire-retardant bridge will not burn in case of fire, so as to prevent the spread of fire. It has extremely good fire prevention and fire resistance effect, fire resistance, oil resistance, corrosion resistance, non-toxic and pollution-free. It is convenient for overall installation, reasonable structure, long service life and beautiful. The cable is installed in the cable bridge, with clean environment and convenient cleaning. Fire retardant coatings have the characteristics of thin coating, high fire resistance and strong adhesion.

二、阻燃防火桥架工艺材料、结构及性能

2、 Process, material, structure and performance of flame retardant and fireproof bridge

钢质骨架主要采用优质冷轧板经机械加工制造而成，具有承载能力高，使用寿命长的特点。钢质骨架的断面整齐无毛刺尖角，槽内光滑平整无尖锐凸起。

The steel skeleton is mainly made of high-quality cold-rolled plate by machining, which has the characteristics of high bearing capacity and long service life. The section of the steel framework shall be neat without burrs and sharp corners, and the groove shall be smooth and flat without sharp bulges.

①加工成型后断面形状均匀、无弯曲、拧曲、裂缝、边沿等缺陷。

① After processing and forming, the section shape is uniform without bending, twisting, cracks, edges and other defects.

②防火板采用硅质材料和钙质材料为主要原料，与一定比例的纤维材料、轻质骨料、黏合剂和化学添加剂混合，经先进的蒸压技术制成。

② The fireproof board is made of siliceous materials and calcareous materials as the main raw materials, mixed with a certain proportion of fiber materials, lightweight aggregates, adhesives and chemical additives, and made by advanced autoclave technology.

③防火涂料是一种高效钢结构保护产品。它精选高分子合成树脂为成膜物质，加以阻燃剂、发泡剂、炭化剂及高温耐火材料配制而成的。它在高温条件下，涂层发生连续发泡膨胀效应，形成柔韧的海绵状的炭化隔热层，使承载的钢结构不会因高温烈焰的作用而急剧软化变形，强度不会急剧下降。外表防火涂料层喷涂要求均匀、光洁、无明显色差。

③ Fire retardant coating is a high-efficiency steel structure protection product. It is made of high molecular synthetic resin as film-forming material, flame retardant, foaming agent, carbonizing agent and high-temperature refractory. Under high temperature conditions, the coating has continuous foaming and expansion effect, forming a flexible sponge like carbonized heat insulation layer, so that the bearing steel structure will not soften and deform sharply due to the action of high temperature flame, and the strength will not decrease sharply. The surface fireproof coating shall be sprayed evenly, bright and clean without obvious color difference.

④结构图形参见钢制槽式桥架系列，内层加防火板或喷防火涂料，且保证防火板与桥架固定可靠。

④ Refer to the steel trough bridge series for the structural drawing. The inner layer shall be added with fireproof board or sprayed with fireproof paint, and the fireproof board and bridge shall be fixed reliably.