山东电缆桥架支吊架布置别瞎来！规范要求讲透，安装验收不踩坑

　　Don't blindly plan the layout of cable tray supports and hangers in Shandong! Explain the regulatory requirements thoroughly and ensure that installation and acceptance do not fall into pitfalls

　　做电气安装工程的兄弟都清楚，电缆桥架支吊架看着是小部件，但其布置是否规范，直接关系到整个桥架系统的稳定性、施工合规性，甚后期验收能否顺利通过。很多工程验收时卡壳，就是因为支吊架布置没按规矩来，要么间距超标，要么关键部位漏装。今天就把支吊架布置的详细要求讲透，不管是直段、弯头还是三通、四通部位，都有明确标准，照着做就能少走弯路。

　　Brothers who work in electrical installation engineering are aware that cable tray supports and hangers may seem like small components, but whether their layout is standardized directly affects the stability and construction compliance of the entire tray system, and even whether the later acceptance can be passed smoothly. Many projects get stuck during acceptance because the arrangement of supports and hangers is not in accordance with regulations, either the spacing exceeds the standard or key parts are missing. Today, we will explain the detailed requirements for the layout of supports and hangers. Whether it is straight sections, bends, tees, or tees, there are clear standards, and following them can avoid detours.

　　先说说基础的直段桥架支吊架布置。直段桥架虽然受力相对均匀，但拼接处是薄弱环节，必须加固。规范要求，在桥架拼接处的两侧，距离不超过50公分的范围内，必须各装一个支架。别小看这两个支架，它们能牢牢固定住拼接部位，避免后期因电缆重力或环境震动导致拼接松动、桥架移位。很多施工队图省事，会把直段支架间距拉得很大，甚拼接处只装一个支架，这种做法看似省了材料，实则留下极大隐患，长期使用很容易出现桥架下垂、变形。

　　First, let's talk about the layout of the most basic straight section bridge support and hanger. Although the straight section bridge is subjected to relatively uniform force, the joint is a weak link and must be reinforced with emphasis. According to regulations, a bracket must be installed on each side of the bridge joint within a distance of no more than 50 centimeters. Don't underestimate these two brackets, they can firmly fix the splicing part, avoiding loosening of the splicing and displacement of the bridge due to cable gravity or environmental vibration in the later stage. Many construction teams try to save time by widening the spacing between straight support brackets, or even installing only one bracket at the joint. This approach may seem to save materials, but in reality, it poses a great safety hazard. Long term use can easily cause the bridge to sag and deform.

　　再看桥架弯头处的支吊架布置，这里是受力集中点，布置要求更严格。弯头本身需要承载转向处的电缆拉力，还得承受自身重量，因此必须双重加固。正确做法是，在桥架与弯头连接处的50公分范围内装一个支架，同时在弯头本体上还要单独装一个支架。这样的双重保障，能有效分散弯头处的受力，避免因单点承重过大导致弯头变形、开裂，进而损伤内部电缆。有些施工队只在连接处装一个支架，忽略弯头上的支架，后期很容易出现弯头下坠，影响电缆的敷设和使用。

　　Looking at the layout of the supports and hangers at the bend of the bridge, this is the point of stress concentration, and the layout requirements are more stringent. The elbow itself needs to bear the cable tension at the turning point and also bear its own weight, so it must be double reinforced. The correct approach is to install a bracket within 50 centimeters of the connection between the bridge and the elbow, and also install a separate bracket on the elbow body. This dual protection can effectively distribute the stress at the elbow, avoiding deformation and cracking of the elbow caused by excessive single point bearing, which may damage the internal cables. Some construction teams only install one bracket at the connection point, ignoring the bracket on the elbow, which can easily cause the elbow to fall down in the later stage, affecting the laying and use of cables.

　　接下来是桥架三通处，由于涉及三个方向的电缆分支，受力情况更复杂，支吊架布置必须。规范要求，在三通三个方向的连接片内侧，要分别装一个支架，确保每个分支的连接部位都能得到稳固支撑；除此之外，在距离拼接处50公分范围内的桥架上，还要再补装一个支架，进一步强化整体稳定性。三通处如果支架布置不到位，很容易出现某一分支受力不均，导致桥架倾斜、拼接处松动，甚影响整个分支的电缆传输。

　　Next is the three-way junction of the cable tray. Due to the involvement of cable branches in three directions, the stress situation is more complex, and the arrangement of supports and hangers must be comprehensive. According to the standard requirements, a bracket should be installed on the inner side of the connecting piece in the three directions of the three-way connector to ensure that the connection part of each branch can be stably supported; In addition, an additional bracket needs to be installed on the bridge within 50 centimeters of the joint to further enhance overall stability. If the bracket arrangement at the three-way junction is not in place, it is easy to cause uneven force on one branch, resulting in the tilting of the bridge, loosening of the joint, and even affecting the cable transmission of the entire branch.

　　桥架四通处的支吊架布置要求，和三通基本一致。因为四通涉及四个方向的分支，受力同样复杂，遵循与三通相同的布置逻辑即可：在四个方向的连接片内侧各装一个支架，同时在拼接处50公分范围内的桥架上补装一个支架。这样能确保四通各部位受力均衡，避免出现局部过载导致的结构变形。

　　The layout requirements for the support and hanger at the four-way of the bridge frame are basically the same as those for the three-way. Because four-way connections involve branches in four directions and have equally complex forces, following the same layout logic as three-way connections is sufficient: installing a bracket on the inner side of each connecting piece in the four directions, and adding a bracket on the bridge within a 50cm range of the joint. This can ensure that the stress on each part of the four-way is balanced, avoiding structural deformation caused by local overload.

　　说说桥架变径处的布置要求。变径处是桥架规格转换的部位，相对特殊但无需过度加固。规范要求，在经过变径位置后，距离变径处50公分范围内的桥架上装一个支架即可，变径本体本身不需要单独装支架。这是因为变径部件本身设计时就考虑了受力衔接，是要固定好变径后的桥架段，确保后续敷设的电缆能平稳过渡。

　　Finally, let's talk about the layout requirements for cable tray diameter changes. The variable diameter area is the part where the bridge specifications are converted, which is relatively special but does not require excessive reinforcement. According to the standard requirements, after passing through the variable diameter position, a bracket can be installed on the bridge within a range of 50 centimeters from the variable diameter location, and the variable diameter body itself does not require a separate bracket. This is because the design of the variable diameter component itself takes into account the force connection, and the key is to fix the cable tray section after the variable diameter to ensure a smooth transition of the cables laid later.

　　总结下来，电缆桥架支吊架布置的核心逻辑就是“关键部位必加固、拼接两侧不缺位、50公分是红线”。不管是直段、弯头还是三通、四通，只要围绕这一逻辑按规范布置，就能保证桥架系统稳定可靠，顺利通过验收。需要提醒的是，实际施工中还要结合桥架规格、电缆重量调整支架规格，确保承重达标。千万别抱有“差不多就行”的侥幸心理，支吊架布置的每一个细节，都是后期用电的重要保障。如果对具体部位的布置还有疑问，建议对照建筑电气规范仔细核对，或咨询的电气工程师，避免因布置不当导致验收返工。

　　In summary, the core logic of the layout of cable tray supports and hangers is that "key parts must be reinforced, there should be no missing joints on both sides, and 50 centimeters is the red line". Whether it's straight sections, bends, tees, or crosses, as long as they are arranged according to the specifications around this logic, it can ensure the stability and reliability of the bridge system and pass the acceptance smoothly. It should be noted that in actual construction, it is necessary to adjust the bracket specifications based on the bridge specifications and cable weight to ensure that the load-bearing capacity meets the standards. Don't have a lucky mentality of 'almost enough', every detail of the support and hanger layout is an important guarantee for later electrical safety. If there are still doubts about the layout of specific parts, it is recommended to carefully check against the building electrical specifications or consult a professional electrical engineer to avoid rework due to improper layout during acceptance.

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