济南人避坑！桥架≠线槽，90%工程人都搞混，一字之差差千里

　　Jinan people avoid pitfalls! Cable tray ≠ trunking, 90% of engineers confuse it, the difference in one word is thousands of miles

　　在济南做工程、搞装修的朋友，十有八九都把桥架和线槽搞混了，觉得两者都是“放电线的槽子”，功能差不多，随便选一个就行。可实际上，这俩东西一字之差，用途、尺寸、安装都差得老远，选错了不仅浪费钱，还可能留下用电隐患，后期返工扯皮更麻烦。今天就用大白话+实打实的数据，给济南的工程人、采购方唠透，济南电缆桥架和线槽到底有啥区别，看完再也不踩错，精准选对适配自己的产品。

　　Friends who work in engineering or decoration in Jinan are most likely to confuse cable trays and trunking, thinking that both are "conduits for laying wires" with similar functions and can choose any one. However, in reality, the difference in usage, size, and installation between these two things is far between. Choosing the wrong one not only wastes money, but may also leave electrical safety hazards, making rework and disputes more troublesome in the later stage. Today, I will use plain language and concrete data to explain to the engineers and buyers in Jinan the differences between cable trays and trunking. After reading, I will never make a mistake and choose the right product that suits me accurately.

　　先给大家一个直白的总结：桥架是“电缆的专属支架+防护槽”，主打一个“承重大、尺寸大、用途广”；线槽是“导线的小型密封槽”，主打一个“体积小、全密封、走细线”。据济南本地建材市场统计，每年因混淆桥架和线槽导致的采购失误率达32%，其中27%需要返工换货，平均每个小型工程多花2000-5000元，大型工程浪费超1万元，可见分清两者有多重要。

　　First of all, let me give you the most straightforward summary: cable trays are "exclusive supports for cables+protective grooves", with a focus on "large load-bearing capacity, large size, and wide applicability"; A trunking is a "small sealing groove for wires" that emphasizes a "small volume, fully sealed, and thin wire running" design. According to statistics from the local building materials market in Jinan, the annual procurement error rate caused by confusion between cable trays and trunking is 32%, of which 27% require rework and replacement. On average, each small project costs 2000-5000 yuan more, and large-scale projects waste over 10000 yuan. This shows how important it is to distinguish between the two.

　　个核心区别，用途不同，一个“走粗电缆”，一个“走细导线”，这也是根本的区别。济南电缆桥架，主要用于敷设大口径、大功率的电力电缆和控制电缆，比如济南高新区工厂的生产线动力电缆、遥墙国际机场的高压供电电缆、西客站的市政电力电缆，都是用桥架来敷设的，能稳稳承载粗电缆的重量，还能保护电缆不受损伤。

　　The first core difference lies in their different uses, one for "thick cables" and the other for "thin wires", which is also the most fundamental difference. Jinan cable trays are mainly used for laying large-diameter and high-power power cables and control cables, such as power cables for production lines in Jinan High tech Zone factories, high-voltage power cables for Yaoqiang International Airport, and municipal power cables for Xike Station. They are all laid using cable trays, which can stably carry the weight of thick cables and protect cables from damage.

　　而线槽，主要用于敷设细小的导线和通讯线缆，比如济南小区住户家里的照明导线、写字楼办公室的网线、电话线，大多用电槽来布置，不用承受太大重量，是把细线整理整齐、做好防护。简单说，直径≥10mm的粗电缆，优先选济南电缆桥架；直径＜10mm的细导线，选线槽就够了，两者用途几乎不重叠。

　　And cable trays are mainly used to lay small wires and communication cables, such as lighting wires for residents in Jinan residential areas, network cables for office buildings and offices, and telephone lines. Most of them are arranged in electrical trays and do not have to bear too much weight. The key is to tidy up the fine wires and do a good job of protection. Simply put, for thick cables with a diameter of ≥ 10mm, Jinan cable trays are preferred; For thin wires with a diameter of less than 10mm, selecting a cable tray is sufficient, and their uses are almost non overlapping.

　　第二个区别，尺寸差距悬殊，一眼就能分清。济南电缆桥架的常规尺寸偏大，宽度从50mm到1200mm不等，高度40mm到400mm，厚度0.5mm到3.0mm，单节长度常规为2米、3米、6米，长可定制到12米，大跨度款甚能适配6米以上的布线需求，跨距8米时挠度≤L/400（L为跨距），每米承重可达200kg，能轻松容纳多根粗电缆。

　　The second difference is the significant difference in size, which can be easily distinguished at a glance. The conventional size of Jinan cable tray is relatively large, with a width ranging from 50mm to 1200mm, a height of 40mm to 400mm, and a thickness of 0.5mm to 3.0mm. The length of a single section is usually 2 meters, 3 meters, or 6 meters, and the longest can be customized to 12 meters. The large-span version can even adapt to wiring needs of more than 6 meters. The maximum deflection at a span of 8 meters is ≤ L/400 (L is the span), and the load-bearing capacity per meter can reach 200kg, making it easy to accommodate multiple thick cables.

　　反观线槽，尺寸就小很多，常规宽度仅20mm到100mm，高度15mm到50mm，厚度0.3mm到1.0mm，单节长度大多是1米、2米，重量轻、体积小，每米承重仅20-50kg，只能容纳几根细导线，根本塞不下粗电缆。而且大家要记住，济南市面上的金属线槽和槽式桥架，材质、形状看似一样，但线槽的尺寸普遍比桥架小30%-60%，这也是两者直观的区别。

　　On the other hand, cable trays are much smaller in size, with a conventional width of only 20mm to 100mm, height of 15mm to 50mm, thickness of 0.3mm to 1.0mm, and a single section length of mostly 1 or 2 meters. They are lightweight and small in size, with a load-bearing capacity of only 20-50kg per meter, and can only accommodate a few thin wires, making it impossible to fit thick cables. And everyone should remember that the metal cable trays and trough type cable trays on the market in Jinan may seem similar in material and shape, but the size of the cable trays is generally 30% -60% smaller than that of the cable trays, which is also the most intuitive difference between the two.

　　第三个区别，款式和密封度不同，适配场景不一样。济南电缆桥架的款式特别多，不像线槽那么单一，主要分为槽式、托盘式、梯架式、网格式四种，占济南桥架市场用量的98%以上，其中槽式是半密封或全密封，托盘式、梯架式、网格式是半开放或开放款，不用都带盖，比如济南工厂车间的高温区域，大多用梯架式桥架，散热性更好，能抵御车间粉尘冲刷，长期使用无堵塞。

　　The third difference is that the style and sealing degree are different, and the adaptation scenarios are also different. There are many styles of cable trays in Jinan, which are not as single as cable trays. They are mainly divided into four types: tray type, ladder type, and mesh format, accounting for more than 98% of the Jinan cable tray market usage. Among them, tray type is semi sealed or fully sealed, while tray type, ladder type, and mesh format are semi open or open and do not need to be covered. For example, in high-temperature areas of Jinan factory workshops, ladder type cable trays are mostly used, which have better heat dissipation and can resist dust erosion in the workshop. They can be used for a long time without blockage.

　　而金属线槽，几乎都是全密封带盖款式，没有其他款式可选，核心作用就是密封防护，防止细导线受潮、积灰、被碰坏，比如济南写字楼的吊顶内、墙面暗敷，大多用电线槽，既能整理线路，又不影响美观。另外，桥架表面多做热浸锌或阳极氧化处理，锌层厚度≥65μm，阳极氧化膜厚度≥12μm，盐雾测试480小时无锈蚀，适配济南户外、潮湿等复杂场景；线槽镀层较薄，大多只做简单喷漆处理，更适合室内干燥环境。

　　And metal cable trays are almost all fully sealed with covers, with no other styles to choose from. Their core function is to seal and protect against moisture, dust accumulation, and damage to fine wires. For example, in Jinan office buildings, cable trays are mostly used for concealed installation in ceilings and walls, which can organize the wiring without affecting the appearance. In addition, the surface of the bridge frame is often treated with hot-dip galvanizing or anodizing, with a zinc layer thickness of ≥ 65 μ m and an anodized film thickness of ≥ 12 μ m. After 480 hours of salt spray testing, there is no corrosion, making it suitable for complex outdoor and humid scenarios in Jinan; The coating of the trunking is relatively thin, and most of them are only treated with simple painting, which is more suitable for indoor dry environments.

　　第四个区别，安装方式和拐弯半径不同，施工要求有差异。济南电缆桥架的跨距比较大，常规跨距1.5-3米，大跨度款可达6米以上，所以安装时拐弯半径也大，常规拐弯半径≥600mm，避免电缆拐弯时被折断、磨损，安装灵活，可沿墙面、吊顶、地面架设，也能搭配吊架固定，单节6米规格可减少50%接头数量，安装效率提升30%。

　　The fourth difference is that the installation method and turning radius are different, and there are differences in construction requirements. The span of Jinan cable tray is relatively large, with a conventional span of 1.5-3 meters. The large-span version can reach more than 6 meters, so the turning radius during installation is also large. The conventional turning radius is ≥ 600mm to avoid cable breakage and wear during turning. The installation is flexible and can be installed along walls, ceilings, and floors. It can also be fixed with hangers. The single 6-meter specification can reduce the number of joints by 50% and improve installation efficiency by 30%.

　　而线槽的跨距很小，常规跨距0.5-1米，不用承受太大重量，所以大多拐直角弯，拐弯半径仅≥100mm，安装时主要以暗敷、贴墙敷设为主，不用复杂的支架、托臂，施工更简单，但灵活性远不如桥架。据济南本地施工队反馈，桥架安装工时比线槽多20%左右，但后期检修更方便，拆开盖板就能操作；线槽检修需要拆卸整体，耗时费力。

　　And the span of the cable tray is very small, with a conventional span of 0.5-1 meters, which does not need to bear too much weight. Therefore, most of them turn at right angles, with a turning radius of only ≥ 100mm. During installation, it is mainly concealed and laid against the wall, without complex brackets or support arms. The construction is simpler, but the flexibility is far less than that of the cable tray. According to feedback from the local construction team in Jinan, the installation time for cable trays is about 20% longer than that for cable trays, but later maintenance is more convenient as the cover plate can be removed for operation; The maintenance of the trunking requires dismantling the entire unit, which is time-consuming and labor-intensive.

　　总结来说，济南电缆桥架和线槽，看似都是“放电线的工具”，但用途、尺寸、款式、安装都有很大区别，核心就是“桥架承重大、尺寸大、款式多、适配广；线槽体积小、全密封、款式单一、走细线”。大家在济南采购、施工时，一定要分清两者，根据自己要敷设的线路类型、场景需求来选择，别再因为混淆两者而选错产品，浪费成本、留下隐患。问问大家，你们在选购济南电缆桥架或线槽时，还遇到过哪些疑问，评论区留言一起探讨～

　　In summary, cable trays and trunking in Jinan may seem like "tools for laying wires", but they have significant differences in purpose, size, style, and installation. The core is that "cable trays have a large load-bearing capacity, large size, multiple styles, and wide adaptability; trunking has a small volume, is fully sealed, has a single style, and runs fine wires". When purchasing and constructing in Jinan, it is important to distinguish between the two and choose according to the type of line and scene requirements you want to lay. Do not choose the wrong product due to confusion between the two, waste costs, and leave hidden dangers. Finally, may I ask if you have encountered any questions when choosing cable trays or trunking in Jinan? Please leave a comment in the comment section to discuss together