选对济南电缆桥架还不够！横担选不好，后期麻烦少不了

　　Choosing the right Jinan cable tray is not enough! Choosing a wrong cross arm will inevitably cause trouble in the later stage

　　做电气工程的都知道，电缆桥架是电缆敷设的“骨架”，但很多人在选型和安装时，往往把全放在桥架本身，却忽略了同样关键的横担。其实横担作为桥架的“承重支点”，直接决定了桥架系统的稳定性、性和使用寿命。选对桥架却用错横担，很容易出现腐蚀、变形、下垂等问题，后期返工得不偿失。今天就把电缆桥架横担的选择与使用技巧讲透，帮你避开这些隐形坑。

　　Those who work in electrical engineering know that cable trays are the "skeleton" of cable laying, but many people tend to focus solely on the tray itself when selecting and installing, while neglecting the equally critical cross arm. In fact, as the "load-bearing fulcrum" of the bridge, the cross arm directly determines the stability, safety, and service life of the bridge system. Choosing the right bridge frame but using the wrong cross arm can easily lead to corrosion, deformation, sagging, and other problems, which are not worth the cost of rework in the later stage. Today, we will explain the selection and usage techniques of cable tray crossarms to help you avoid these hidden pitfalls.

　　横担选择的核心原则之一，就是**材质必须与桥架匹配**，这一点直接关系到系统的防腐性能和功能达标。比如用镀锌桥架，就必须搭配镀锌横担；用防火桥架，对应的横担也得是防火材质。如果材质混搭，比如镀锌桥架配普通碳钢横担，两者电位不同，在潮湿环境中容易发生电化学腐蚀，用不了多久就会生锈损坏；要是防火桥架配了非防火横担，还会导致整体防火性能不达标，过不了验收不说，还留下火灾隐患。材质选择上，优先选热镀锌工艺的横担，防锈能力比冷镀锌更强，尤其适合户外、地下室、卫生间等潮湿环境，能大大延长使用寿命。

　　One of the core principles for selecting crossarms is that the material must match the bridge frame, which directly affects the anti-corrosion performance and functional standards of the system. For example, when using galvanized cable trays, they must be paired with galvanized cross arms; Use fire-resistant bridge frames, and the corresponding cross arms must also be made of fire-resistant materials. If the materials are mixed, such as galvanized cable trays with ordinary carbon steel cross arms, the two have different potentials and are prone to electrochemical corrosion in humid environments, which will rust and damage in a short time; If the fireproof bridge is equipped with non fireproof cross arms, it will also result in the overall fire performance not meeting the standards, not only failing the acceptance, but also leaving fire hazards. In terms of material selection, hot-dip galvanized crossarms are preferred as they have stronger rust prevention ability than cold galvanizing, especially suitable for outdoor, basement, bathroom and other humid environments, which can greatly extend their service life.

　　承重能力达标是横担选择的底线，不能将就。横担要承受桥架本身的重量，再加上里面敷设的电缆重量，要是承载量不足，很容易导致桥架中间下垂、变形，甚拉断支架，引发事故。选择时，必须先根据桥架的规格型号、敷设的电缆数量和总重量，精准计算横担需要承受的载荷，再对应选择合适规格的横担。如果是大跨度场景，比如桥架跨度超过1.5米，或者需要敷设大量重型电缆的重负荷场景，普通横担肯定扛不住，得选用加厚型横担，必要时还要在横担上增加加固肋，进一步提升承重能力，确保长期使用稳定可靠。

　　Meeting the load-bearing capacity standard is the bottom line for selecting crossarms, and we must not compromise on it. The cross arm needs to bear the weight of the bridge itself, plus the weight of the cables laid inside. If the bearing capacity is insufficient, it is easy to cause the middle of the bridge to sag, deform, and even break the support, causing safety accidents. When selecting, it is necessary to accurately calculate the load that the cross arm needs to bear based on the specifications and models of the bridge, the number of cables laid, and the total weight, and then select the appropriate size of cross arm accordingly. If it is a large-span scenario, such as a bridge span exceeding 1.5 meters, or a heavy load scenario that requires laying a large number of heavy cables, ordinary crossarms will definitely not be able to withstand it. Thickened crossarms should be selected, and reinforcement ribs should be added to the crossarms if necessary to further enhance the load-bearing capacity and ensure long-term stable and reliable use.

　　横担的尺寸适配也很关键，不是随便选个长度就行。规范要求，横担的长度必须比桥架的宽度宽50-100毫米，这样才能让桥架稳稳地放在横担上，不会出现偏移、晃动的情况。很多施工队图省事，用和桥架宽度一样的横担，看似能放上去，后期受震动或电缆重力影响，很容易出现桥架移位，甚滑落的风险。如果是多层桥架安装，横担之间的间距也有讲究，通常不能小于300毫米，这个间距既能保证每层电缆有足够的敷设空间，也方便后期检修维护，避免因间距过小导致操作不便。

　　The size adaptation of the crossbar is also crucial, it's not just about choosing a length. According to the standard requirements, the length of the crossbar must be 50-100 millimeters wider than the width of the bridge, so that the bridge can be stably placed on the crossbar without any deviation or shaking. Many construction teams try to save time by using cross arms that are the same width as the bridge, which may seem like they can be placed on top. However, in the later stage, due to vibration or cable gravity, there is a risk of bridge displacement or even sliding. If it is a multi-layer bridge installation, there are also requirements for the spacing between the cross arms, usually not less than 300 millimeters. This spacing can ensure sufficient laying space for each layer of cables and facilitate later maintenance and repair, avoiding inconvenience caused by too small spacing during operation.

　　安装细节同样不能忽视，很多问题都是因为安装不到位引发的。横担与支架、桥架的连接，必须用防盗螺栓固定，而且要拧紧到位，不能用普通螺栓敷衍了事，尤其是户外或人员流动频繁的区域，防止人为松动或破坏；户外安装的横担，一定要做排水设计，比如让横担稍微倾斜，避免雨水积聚在表面，导致锈蚀加速；如果横担安装在靠近火源或高温的区域，比如锅炉旁、配电箱附近，普通材质的横担容易变形损坏，这时候就需要选用耐高温材质的横担，同时配合防火桥架使用，确保整体性能达标。

　　The installation details cannot be ignored either, as many problems are caused by inadequate installation. The connection between the cross arm and the bracket or bridge must be fixed with anti-theft bolts and tightened in place. Ordinary bolts cannot be used casually, especially in outdoor or areas with frequent personnel flow, to prevent human loosening or damage; The cross arm installed outdoors must have drainage design, such as slightly tilting the cross arm to prevent rainwater from accumulating on the surface and accelerating corrosion; If the cross arm is installed in an area close to a fire source or high temperature, such as near a boiler or distribution box, ordinary material cross arms are prone to deformation and damage. In this case, it is necessary to choose cross arms made of high temperature resistant materials and use them in conjunction with fire-resistant cable trays to ensure that the overall performance meets the standard.

　　总结下来，电缆桥架横担的选择与使用，核心就是抓牢“材质匹配、承重达标、尺寸适配、安装规范”这四个关键点。它虽然是桥架系统的“小部件”，但作用却关重要，直接影响整个电气敷设工程的质量和。下次做工程时，千万别再只盯着桥架了，把横担的选型和安装细节做到位，才能让桥架系统长期稳定运行，避免后期出现返工、维修的麻烦。如果对横担的具体选型还有疑问，建议结合工程的实际环境、载荷情况，咨询的设备厂家，确保选到合适的横担。

　　In summary, the selection and use of cable tray crossarms rely on four key points: material matching, load-bearing compliance, size adaptation, and installation specifications. Although it is a "small component" of the bridge system, its role is crucial and directly affects the quality and safety of the entire electrical laying project. Next time you do a project, don't just focus on the bridge frame. Make sure to carefully select and install the crossarms in order to ensure the long-term stable operation of the bridge frame system and avoid the trouble of rework and maintenance in the later stage. If there are still doubts about the specific selection of crossarms, it is recommended to consult professional equipment manufacturers based on the actual environment and load conditions of the project to ensure the most suitable crossarm is selected.

　　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/   真诚的态度.为您提供为的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

　　This article is a friendly contribution from Jinan Cable Bridge For more related knowledge, please click http://www.sddlqj.cn/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.