2类核心支架！济南电缆桥架，抗震承重双达标

　　Type 2 core bracket! Jinan cable tray, seismic and load-bearing double standard

　　在济南建筑、工业电力布线中，电缆桥架的稳固性全靠调节支架“托底”--很多人只关注桥架本体品质，却忽略了支架的关键作用，殊不知支架选型不当，会导致桥架偏移、脱落，甚引发电气事故。济南电缆桥架常用的调节支架主要分两类：四杆掉落式与角钢支架，搭配按需加装的抗震支架，适配不同现场工况，今天就结合济南本地实操案例与实打实的数据，跟大伙唠透电缆桥架调节支架的选型、用途与核心优势。

　　In the construction and industrial power wiring of Jinan, the stability of cable trays relies entirely on adjusting the brackets to "support the bottom" - many people only focus on the quality of the tray body, but ignore the key role of the brackets, unaware that improper selection of brackets can lead to tray displacement, detachment, and even cause electrical safety accidents. The commonly used adjustment brackets for cable trays in Jinan are mainly divided into two categories: four-bar drop type and angle steel brackets, combined with seismic brackets installed as needed to adapt to different on-site working conditions. Today, based on local practical cases and actual data in Jinan, we will talk about the selection, use, and core advantages of cable tray adjustment brackets.

　　先看四杆掉落式调节支架，主打灵活可调、适配性强，是济南电缆桥架安装的常用款。这类支架采用四杆联动结构，可精准调节桥架高度与水平度，调节范围可达50-300mm，误差控制在2mm以内，能轻松适配现场地面、墙面不平整的问题，避免桥架倾斜导致电缆受力不均。实测显示，单组四杆掉落式支架可承重80-120kg，适配宽度300-800mm的桥架，搭配防滑垫片，防滑效果提升45%，有效防止桥架滑动，广泛应用于济南写字楼、住宅小区等民用建筑的电缆布线场景。

　　First, let's take a look at the four-bar drop adjustable bracket, which emphasizes flexibility, adjustability, and strong adaptability. It is a commonly used model for installing cable trays in Jinan. This type of bracket adopts a four-bar linkage structure, which can accurately adjust the height and levelness of the cable tray. The adjustment range can reach 50-300mm, with an error controlled within 2mm. It can easily adapt to the problem of uneven ground and wall surfaces on site, avoiding cable stress caused by cable tray tilting. Tests have shown that a single set of four-bar drop off brackets can bear a weight of 80-120kg, suitable for bridge frames with a width of 300-800mm. Paired with anti slip pads, the anti slip effect is improved by 45%, effectively preventing bridge frame sliding. It is widely used in cable wiring scenarios in civil buildings such as office buildings and residential communities in Jinan.

　　四杆掉落式支架的核心优势的是便捷安装与后期维护，2名工人1小时可完成15-20组安装，比传统支架安装效率提升30%。其采用冷轧钢板一体成型，表面经过热镀锌处理，耐腐蚀性能优异，可适应济南潮湿、多粉尘的环境，使用寿命达25年以上，比未镀锌支架寿命提升60%。同时，支架可重复拆卸利用，后期电缆改造时无需重新更换，大幅降低施工与维护成本，济南某写字楼项目采用此类支架，累计节省后期改造成本近20%。

　　The core advantage of the four-bar drop bracket is its convenient installation and post maintenance. Two workers can complete 15-20 sets of installations in one hour, which is 30% more efficient than traditional bracket installations. It is made of cold-rolled steel plates and is integrally formed. The surface is treated with hot-dip galvanizing, which has excellent corrosion resistance and can adapt to the humid and dusty environment in Jinan. Its service life is over 25 years, which is 60% longer than that of non galvanized brackets. At the same time, the bracket can be disassembled and reused, so there is no need to replace the cable during later cable renovation, greatly reducing construction and maintenance costs. A certain office building project in Jinan adopted this type of bracket, saving nearly 20% of the later renovation costs.

　　角钢支架主打重载适配，是济南工业场景的“硬核之选”。这类支架采用50×50×5mm或75×75×7mm规格角钢焊接成型，结构坚固，承重能力远超四杆掉落式支架，单组可承重200-350kg，适配宽度800-1500mm的重型桥架，适合铺设多组工业电缆、高压电缆的场景，比如济南工业园区、厂房、化工基地等。实测数据显示，角钢支架的抗扭强度达1200N·m，比四杆掉落式支架提升85%，长期承载重型电缆无变形、无松动，稳定性拉满。

　　The angle steel bracket focuses on heavy-duty adaptation and is the "hardcore choice" for industrial scenes in Jinan. This type of bracket is welded with 50 × 50 × 5mm or 75 × 75 × 7mm angle steel, with a sturdy structure and a load-bearing capacity far exceeding that of a four-bar drop bracket. A single group can bear 200-350kg, suitable for heavy-duty cable trays with a width of 800-1500mm. It is suitable for laying multiple groups of industrial cables and high-voltage cables, such as in Jinan Industrial Park, factories, chemical bases, etc. The measured data shows that the torsional strength of the angle steel bracket reaches 1200N · m, which is 85% higher than that of the four-bar drop bracket. It can bear heavy cables for a long time without deformation or looseness, and is stable when fully pulled.

　　按需加装抗震支架，是济南电缆桥架防护的“加分项”，尤其适配地震设防区域。根据GB 50981-2014《建筑机电工程抗震设计规范》，济南作为地震设防烈度6-7度地区，工业建筑、高层建筑的电缆桥架必须加装抗震支架。抗震支架与调节支架配套使用，可抵御0.3g地震加速度，地震时能限制桥架水平位移不超过10mm，竖向位移不超过5mm，将桥架脱落风险降低95%以上，济南多数工业项目、高层住宅均已强制配套安装。

　　Installing seismic supports as needed is a "bonus point" for the safety protection of Jinan cable trays, especially suitable for earthquake resistant areas. According to GB 50981-2014 "Code for Seismic Design of Building Mechanical and Electrical Engineering", as an area with seismic fortification intensity of 6-7 degrees, cable trays in industrial and high-rise buildings in Jinan must be equipped with seismic supports. The anti-seismic bracket is used in conjunction with the adjustment bracket, which can withstand an earthquake acceleration of 0.3g. During an earthquake, it can limit the horizontal displacement of the bridge frame to no more than 10mm and the vertical displacement to no more than 5mm, reducing the risk of bridge frame detachment by more than 95%. Most industrial projects and high-rise residential buildings in Jinan have mandatory installation.

　　济南电缆桥架支架的选型，需贴合现场实际工况，避免“一刀切”。民用建筑、轻型电缆布线，优先选四杆掉落式支架，兼顾灵活性与性价比；工业重载、高压电缆场景，优先选角钢支架，保障承重与稳定性；地震设防区域，无论哪种支架，都需配套加装抗震支架，守住底线。数据显示，济南规范选型并加装抗震支架的项目，电缆桥架因外力、地震导致的故障发生率不足0.5%，远低于未规范选型的3.2%。

　　The selection of cable tray supports in Jinan should be tailored to the actual working conditions on site, avoiding a one size fits all approach. For civil buildings and lightweight cable wiring, priority should be given to four pole drop off brackets, taking into account flexibility and cost-effectiveness; In industrial heavy-duty and high-voltage cable scenarios, angle steel brackets are preferred to ensure load-bearing and stability; In earthquake resistant areas, regardless of the type of support, anti-seismic support must be installed to maintain the safety bottom line. Data shows that for projects in Jinan that require standardized selection and installation of seismic supports, the failure rate of cable trays caused by external forces and earthquakes is less than 0.5%, far lower than the 3.2% that is not standardized.

　　除了选型，支架的安装细节也影响整体稳定性。济南本地合规施工中，支架间距严格遵循规范：轻型桥架支架间距不超过1.5m，重型桥架不超过1.2m，抗震支架间距不超过2.0m，每间隔3组普通支架加装1组加固支架，进一步提升整体牢固度。同时，支架与墙面、顶面的固定需采用膨胀螺栓，螺栓植入深度不低于80mm，确保固定强度，避免后期松动。

　　In addition to selection, the installation details of the bracket also affect overall stability. In local compliant construction in Jinan, the spacing between supports strictly follows the specifications: the spacing between light bridge supports should not exceed 1.5m, the spacing between heavy bridge supports should not exceed 1.2m, and the spacing between seismic supports should not exceed 2.0m. For every 3 sets of ordinary supports, 1 set of reinforced supports should be added to further enhance the overall firmness. At the same time, expansion bolts should be used to fix the bracket to the wall and top surface, with a bolt insertion depth of not less than 80mm, to ensure the fixing strength and avoid loosening in the later stage.

　　总结来说，济南电缆桥架的稳固性，核心在于2类调节支架的精准选型与规范安装--四杆掉落式适配民用轻载，角钢支架扛起工业重载，搭配抗震支架筑牢防线。依托精准的调节范围、的承重能力与适配性，这些支架不仅契合济南各类建筑、工业场景的布线需求，更能保障电缆长期稳定运行，避开隐患，成为济南电力传输系统中不可或缺的“隐形支撑”。

　　In summary, the stability of Jinan cable trays lies in the precise selection and standardized installation of two types of adjustment brackets - four bar drop type suitable for civilian light loads, angle steel brackets for industrial heavy loads, and seismic brackets to build a strong safety line. Relying on precise adjustment range, super strong load-bearing capacity and adaptability, these brackets not only meet the wiring needs of various buildings and industrial scenes in Jinan, but also ensure the long-term stable operation of cables, avoid safety hazards, and become an indispensable "hidden support" in Jinan's power transmission system.

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