桥架看着就是几根铁皮，真选错，后期电缆发热、塌架、返工全找上门。

The cable tray looks like just a few pieces of metal, but if you choose the wrong one, you will end up with the cables overheating, collapsing, and having to rework.

先记一句口诀：动力大线走梯式，强弱电混铺用托盘，弱电防干扰选槽式。梯式散热好、承重强，适合厂房高压主干；托盘带孔，兼顾散热和防尘；槽式全封闭，适合机房、监控、通信线，但别硬塞大截面动力电缆，否则散热吃亏。

First, remember a mnemonic: power line ladder type, mixed strong and weak electric laying tray, weak electric anti-interference slot type. Ladder style heat dissipation is good, with strong load-bearing capacity, suitable for high-voltage main lines in factories; Tray with holes, balancing heat dissipation and dust prevention; Slot type fully enclosed, suitable for computer rooms, monitoring, and communication lines, but do not forcefully plug large section power cables, otherwise the heat dissipation will be compromised.

材质和表面处理决定寿命。普通室内干燥环境，热浸镀锌或喷塑够用；地下车库、潮湿车间直接上热浸锌，锌层建议≥65μm，记得要盐雾试验报告；化工厂、沿海高盐雾，上316L不锈钢或玻璃钢（FRP）。采购时别只比单价，板厚负差、锌层虚标是重灾区——宽度≥400mm的桥架，板厚别低于2.0mm，到货拿测厚仪抽检。

The material and surface treatment determine the lifespan. Ordinary indoor dry environment, hot-dip galvanizing or spray coating is sufficient; Directly apply hot-dip galvanizing to underground garages and damp workshops, with a recommended zinc layer of ≥ 65 μ m. Remember to provide a salt spray test report; Chemical plants, coastal high salt spray, coated with 316L stainless steel or fiberglass reinforced plastic (FRP). When purchasing, do not only compare the unit price. Negative differences in plate thickness and false labeling of zinc layer are the hardest hit areas - for bridge frames with a width ≥ 400mm, the plate thickness should not be less than 2.0mm, and a thickness gauge should be used for sampling upon arrival.

安装也有硬指标：户内支吊架间距1.5–3m，转弯和三通附近建议加支架；钢制直线段超30m设伸缩节；金属桥架全程接地，跨接用≥4mm?铜编织线。填充率别贪满，动力电缆不超40%–50%，控制电缆不超70%，留10%–25%后期扩容余量。

There are also hard indicators for installation: the spacing between indoor supports and hangers is 1.5-3m, and brackets must be added near bends and tees; Expansion joints shall be installed for steel straight sections exceeding 30m; The metal bridge is fully grounded, and a ≥ 4mm copper braided wire is used for bridging. The filling rate should not exceed 40% -50% for power cables, 70% for control cables, and leave 10% -25% for later expansion.

桥架不是耗材，是工程里用十年的底层骨架。选型算准荷载、挠度控在L/200以内，前期多核一遍参数，后面少停三天电。

Cable trays are not consumables, they are the bottom skeleton used in engineering for ten years. Select accurate loads and control deflection within L/200. Verify parameters multiple times in the early stage and reduce power outages by three days later.

本文由济南电缆桥架友情奉献.更多有关的知识请点击:http://www.sddlqj.cn/我们将会对您提出的疑问进行详细的解答，欢迎您登录网站留言.

This article is a friendly contribution from Jinan Cable Bridge For more information, please click: http://www.sddlqj.cn/ We will provide detailed answers to your questions. You are welcome to log in to our website and leave a message