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、防火阻燃橋架特點

1、 Characteristics of fireproof and flame retardant Bridge

阻燃防火橋架主要由玻璃纖維增強材料和無機黏合劑復合的防火板與金屬骨架復合以及其他的防火基材組成。外層加防火涂料，阻燃防火橋架遇火后不會燃燒，從而阻隔火勢蔓延，具有出色其良好的防火阻火效果，又具有耐火、耐油、耐腐蝕、無毒、無污染，整體安裝方便，結構合理，使用壽命長，并且美觀，電纜安裝在電纜橋架中，環境整潔，清掃方便。防火涂料有涂層薄、耐火出色高、粘接力強的特點。

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、阻燃防火橋架工藝材料、結構及性能

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

鋼質骨架主要采用優良冷軋板經機械加工制造而成，具有承載能力高，使用壽命長的特點。鋼質骨架的斷面整齊無毛刺尖角，槽內光滑平整無尖銳凸起。

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加工成型后斷面形狀均勻、無彎曲、擰曲、裂縫、邊沿等缺陷。

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

②防火板采用硅質材料和鈣質材料為主要原料，與一定比例的纖維材料、輕質骨料、黏合劑和化學添加劑混合，經先進的蒸壓技術制成。

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防火涂料是一種出色鋼結構保護產品。它精選高分子合成樹脂為成膜物質，加以阻燃劑、發泡劑、炭化劑及高溫耐火材料配制而成的。它在高溫條件下，涂層發生連續發泡膨脹效應，形成柔韌的海綿狀的炭化隔熱層，使承載的鋼結構不會因高溫烈焰的作用而急劇軟化變形，強度不會急劇下降。外表防火涂料層噴涂要求均勻、光潔、無明顯色差。

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結構圖形參見鋼制槽式橋架系列，內層加防火板或噴防火涂料，且保證防火板與橋架固定可靠。

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.