山東電纜橋架驗收別大意！7大關鍵注意事項，筑牢用電防線

　　Don't be careless about the acceptance of Shandong cable tray! 7 key precautions to strengthen the defense line of electrical safety

　　做工程的兄弟都清楚，電纜橋架驗收是保障后期用電的關鍵環節，絕非“隨便看看外觀、檢查下固定”那么簡單。一旦驗收環節遺漏要點，很可能留下導電不良、承重不足、火災隱患等問題，后期返工不僅費錢費力，還可能影響整個工程的交付進度。今天就把電纜橋架驗收的7大核心注意事項講透，都是實操中總結的干貨，收藏好對照著查，確保驗收一步到位不踩坑。

　　Engineering brothers all know that cable tray acceptance is a key link in ensuring electrical safety in the later stage, and it is not as simple as "just looking at the appearance and checking the fixation". Once the key points are missed in the acceptance process, it is likely to leave safety issues such as poor conductivity, insufficient load-bearing capacity, and fire hazards. Rework in the later stage not only costs money and effort, but may also affect the delivery schedule of the entire project. Today, we will explain the 7 core precautions for cable tray acceptance, which are all practical summaries. Collect and compare them to ensure that the acceptance is completed in one step without any pitfalls.

　　要關注的是橋架連接處的跨接線安裝，這是保障導電連續性的核心要求。很多工程驗收時容易忽略跨接線的規格，規范明確要求，連接處必須安裝截面積≥4mm?的跨接線。別小看這根線，它能確保整個橋架形成完整的導電回路，避免因接觸不良產生電火花，從根源減少隱患。驗收時一定要逐一檢查，確認跨接線安裝牢固、規格達標，不能有遺漏或偷工減料的情況。

　　The first thing to focus on is the installation of jumper wires at the bridge connection, which is the core requirement for ensuring conductivity continuity. During the acceptance of many projects, it is easy to overlook the specifications of jumper wires. The specifications clearly require that jumper wires with a cross-sectional area of ≥ 4mm must be installed at the connection. Don't underestimate this wire, it can ensure that the entire bridge forms a complete conductive circuit, avoid electric sparks caused by poor contact, and reduce safety hazards from the root. During acceptance inspection, it is necessary to check one by one to confirm that the jumper wires are firmly installed and meet the specifications, and there should be no omissions or cutting corners.

　　其次是橋架與支架、橫擔的連接牢固性。橋架的穩定性全靠支架支撐，驗收時要檢查所有連接部位是否采用螺栓固定，擰緊程度是否到位，用手晃動橋架和支架，不能有松動、晃動的情況。有些施工隊為了圖省事，會用焊接代替螺栓固定，這種做法不符合規范，后續一旦出現腐蝕或震動，很容易導致橋架脫落，必須堅決杜絕。

　　Next is the firmness of the connection between the bridge frame, bracket, and cross arm. The stability of the bridge frame relies entirely on the support of the brackets. During acceptance, it is necessary to check whether all connecting parts are fixed with bolts and whether the tightening degree is in place. The bridge frame and brackets should be shaken by hand without any looseness or shaking. Some construction teams, in order to save time, use welding instead of bolts for fixing. This practice does not comply with regulations, and once corrosion or vibration occurs in the future, it is easy to cause the bridge to fall off, which must be resolutely eliminated.

　　第三點是伸縮節和補償器的設置。電纜橋架在溫度變化時會熱脹冷縮，若不設置伸縮裝置，長期下來容易導致橋架變形、開裂。規范要求，橋架直段安裝長度超過30m時，必須設置伸縮節；如果橋架需要跨越變形縫，還得在變形縫位置額外增加補償器，確保橋架能適應溫度變化和結構沉降，始終保持穩定。驗收時要核對橋架長度和伸縮節、補償器的安裝位置，確認數量和規格都符合要求。

　　The third point is the setting of expansion joints and compensators. Cable trays will experience thermal expansion and contraction during temperature changes. If no expansion device is installed, it is easy to cause deformation and cracking of the tray over time. According to regulations, when the installation length of the straight section of the bridge exceeds 30m, expansion joints must be installed; If the bridge needs to cross deformation joints, additional compensators need to be added at the position of the deformation joints to ensure that the bridge can adapt to temperature changes and structural settlement, and remain stable at all times. During acceptance, the length of the bridge frame and the installation positions of expansion joints and compensators should be checked to confirm that the quantity and specifications meet the requirements.

　　第四點要檢查吊桿的直徑規格。用吊桿固定橋架時，吊桿的承重能力直接關系到橋架的，規范明確要求吊桿直徑不能小于8mm。驗收時可以用卡尺實測吊桿直徑，同時檢查吊桿與頂部結構的連接是否牢固，避免因吊桿過細或固定不牢，導致橋架承重不足而下垂變形，尤其是在橋架內鋪設大量電纜后，承重壓力會進一步增大，更要確保吊桿達標。

　　The fourth point is to check the diameter specifications of the suspension rod. When fixing the bridge frame with a suspension rod, the load-bearing capacity of the suspension rod is directly related to the safety of the bridge frame. The specification clearly requires that the diameter of the suspension rod should not be less than 8mm. During acceptance, the diameter of the suspension rod can be measured with a caliper, and the connection between the suspension rod and the top structure can be checked for firmness to avoid insufficient load-bearing and deformation of the bridge frame due to the suspension rod being too thin or not firmly fixed. Especially after laying a large number of cables in the bridge frame, the load-bearing pressure will further increase, and it is necessary to ensure that the suspension rod meets the standard.

　　第五點是支吊架的間距控制。支吊架間距過大是驗收中常見的問題，規范要求間距不能超過2m。間距過大容易導致橋架中間部位下垂，不僅影響美觀，還可能壓迫電纜，影響電纜的使用壽命。驗收時要沿著橋架走向逐段測量，確認支吊架安裝均勻，間距嚴格控制在2m以內，對于橋架轉彎、爬坡等受力較大的部位，還可以適當縮小間距。

　　The fifth point is the spacing control of supports and hangers. Excessive spacing between supports and hangers is a common problem in acceptance testing, and the maximum spacing required by regulations should not exceed 2 meters. Excessive spacing can easily cause sagging in the middle of the bridge, which not only affects aesthetics but may also compress cables and affect their service life. During acceptance, measurements should be taken section by section along the direction of the bridge to confirm that the support and hanger installations are evenly distributed and the spacing is strictly controlled within 2 meters. For areas with high stress such as bridge bends and climbing, the spacing can be appropriately reduced.

　　第六點要關注彎頭處的支架設置。橋架彎頭處是受力薄弱環節，也是容易變形的部位，規范要求在彎頭處以及彎頭兩側600mm范圍內，必須設置支架。驗收時要檢查彎頭部位，確認支架安裝到位，能有效支撐彎頭重量，避免因彎頭處缺乏支撐導致橋架變形，進而影響電纜的鋪設和使用。

　　The sixth point is to pay attention to the bracket setting at the bend. The bend of the bridge is a weak point of stress and a prone area to deformation. According to regulations, brackets must be installed at the bend and within a range of 600mm on both sides of the bend. During acceptance inspection, it is important to focus on checking the elbow area to ensure that the bracket is installed properly and can effectively support the weight of the elbow, avoiding deformation of the cable tray due to lack of support at the elbow, which may affect the laying and use of the cable.

　　一點，也是容易被忽略的防火封堵和蓋板閉合。電纜穿裝完成后，必須及時蓋上橋架蓋板，防止灰塵進入或意外觸碰電纜；更關鍵的是，橋架穿墻、穿樓板的洞口，必須做好防火封堵。防火封堵能有效阻止火災時火焰通過洞口蔓延，是保障建筑防火的重要措施。驗收時要檢查蓋板是否閉合嚴密，防火封堵材料是否填充飽滿、符合防火等級要求，不能有縫隙或遺漏的洞口。

　　The last point, which is also easily overlooked, is the fireproof sealing and cover closure. After the cable installation is completed, the bridge cover must be promptly covered to prevent dust from entering or accidentally touching the cable; More importantly, fireproof sealing must be done for the openings of bridge frames passing through walls and floors. Fireproof sealing can effectively prevent flames from spreading through openings during a fire, and is an important measure to ensure building fire safety. During acceptance, it is necessary to check whether the cover plate is tightly closed, whether the fireproof sealing material is fully filled and meets the requirements of the fire rating, and whether there are no gaps or missing openings.

　　以上7點是電纜橋架驗收的基礎規范要求，每一項都直接關系到后期使用，少一項都可能導致驗收不通過，甚留下隱患。驗收時一定要耐心細致，逐點核對，不能抱有“差不多就行”的僥幸心理。除了這7點，實際驗收中還可以結合工程的具體情況，檢查橋架的防腐處理、電纜鋪設的整齊度等細節。只有嚴格按照規范驗收，才能確保電纜橋架系統穩定可靠，為后續用電筑牢防線。如果在驗收過程中遇到疑問，建議及時咨詢的電氣工程師，避免因知識不足導致驗收失誤。

　　The above 7 points are the basic specification requirements for cable tray acceptance, each of which is directly related to the safety of later use. Missing one item may result in failure of acceptance or even leave safety hazards. During the acceptance process, one must be patient and meticulous, checking each point point point by point, and not have a lucky mentality of 'almost enough'. In addition to these 7 points, the actual acceptance can also be combined with the specific situation of the project to check the anti-corrosion treatment of the bridge frame, the neatness of cable laying, and other details. Only by strictly following the standards for acceptance can we ensure the stability and reliability of the cable tray system, and build a solid defense line for subsequent electrical safety. If you encounter any doubts during the acceptance process, it is recommended to consult a professional electrical engineer in a timely manner to avoid acceptance errors due to insufficient professional knowledge.

　　本文由 山東電纜橋架   友情奉獻.更多有關的知識請點擊  http://www.im21.com.cn/   真誠的態度.為您提供為的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.

　　This article is a friendly contribution from Shandong Cable Bridge For more related knowledge, please click http://www.im21.com.cn/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.