在弱电工程中，电缆桥架是布线系统的核心载体，其选型与安装直接影响线路与系统稳定性。以下从常用类型、性能差异、安装规范、材质选型及荷载要求等方面进行系统解析。

　　In weak current engineering, cable tray is the core carrier of the wiring system, and its selection and installation directly affect the safety of the line and the stability of the system. The following provides a systematic analysis of common types, performance differences, installation specifications, material selection, and load requirements.

　　常用电缆桥架类型及核心特性

　　Common cable tray types and core characteristics

　　弱电工程中应用广泛的电缆桥架主要包括槽式桥架、托盘式桥架、铝合金桥架和网格式桥架四类。其中槽式、托盘式与梯架同属传统桥架体系，三者因结构差异呈现不同性能特点。

　　The most widely used cable trays in weak current engineering mainly include trough trays, tray trays, aluminum alloy trays, and grid trays. Among them, trough type, tray type, and ladder type belong to the traditional bridge system, and they exhibit different performance characteristics due to structural differences.

　　托盘式桥架

　　tray-type cable bridge

　　（一）槽式电缆桥架

　　（1） Slotted cable tray

　　结构特点：全封闭型槽盒结构，无开孔设计，防护性更强。

　　Structural features: Fully enclosed slot box structure, no opening design, stronger protection.

　　核心优势：具备优异的屏蔽抗干扰能力和防腐性能，防火性突出。

　　Core advantage: It has excellent shielding and anti-interference capabilities, anti-corrosion performance, and outstanding fire resistance.

　　适用场景：专为敷设截面小、数量多的电线电缆设计，尤其适用于控制电缆屏蔽干扰需求高或重腐蚀环境（如化工、沿海区域）。

　　Applicable scenarios: Designed specifically for laying wires and cables with small cross-sections and large quantities, especially suitable for controlling cable shielding interference requirements or heavily corrosive environments (such as chemical and coastal areas).

　　（二）托盘式电缆桥架

　　（2） Tray type cable tray

　　结构特点：属半开放型桥架，底部设有腰形散热孔，因开孔设计需采用更厚板材增强承重。

　　Structural features: It belongs to a semi open bridge structure, with waist shaped heat dissipation holes at the bottom. Due to the hole design, thicker plates are required to enhance the load-bearing capacity.

　　核心优势：载荷能力大，通风散热性优异，安装便捷。

　　Core advantages: High load capacity, excellent ventilation and heat dissipation, easy installation.

　　适用场景：主要用于敷设截面大、数量少的电力电缆，适合对散热要求较高的配电线路。

　　Applicable scenarios: Mainly used for laying power cables with large cross-sections and small quantities, suitable for distribution lines with high heat dissipation requirements.

　　（三）槽式与托盘式桥架的核心差异

　　（3） The core difference between trough type and tray type cable trays

　　（四）铝合金桥架

　　（4） Aluminum alloy bridge frame

　　结构特点：外观简洁、自重轻（较钢制桥架更轻便），结构强度高。

　　Structural features: simple appearance, light weight (lighter than steel bridge), high structural strength.

　　核心优势：表面经阳极氧化处理后，抗腐蚀、抗电磁干扰（尤其屏蔽干扰）性能突出，为钢制桥架所不可替代。

　　Core advantage: After surface anodizing treatment, it has outstanding corrosion resistance and electromagnetic interference resistance (especially shielding interference) performance, which cannot be replaced by steel bridge frames.

　　适用场景：适用于对轻量化、抗干扰要求高的场所，但不适用于防火等级要求高的工程，且成本显著高于钢制桥架。

　　Applicable scenarios: Suitable for places with high requirements for lightweight and anti-interference, but not suitable for projects with high fire rating requirements, and the cost is significantly higher than that of steel cable trays.

　　（五）网格式桥架

　　（5） Network format bridge

　　别名与来源：又称金属网格式桥架、开放式桥架，源自欧洲的桥架创新设计。

　　Alias and source: also known as metal mesh bridge or open bridge, originating from innovative bridge design in Europe.

　　结构特点：开放式网格结构，自重仅为传统桥架的 1/5，安装效率提升 2/3。

　　Structural features: Open grid structure, with a self weight of only 1/5 of traditional cable trays, and an installation efficiency improvement of 2/3.

　　核心优势：系统升级与维护灵活性高，支持上下走线自由调整；散热性优异，延长线缆使用寿命；布线环境更清洁美观，减少二次投资成本。

　　Core advantage: High flexibility in system upgrade and maintenance, supporting free adjustment of up and down wiring; Excellent heat dissipation, extending the service life of cables; The wiring environment is cleaner and more aesthetically pleasing, reducing secondary investment costs.

　　限制与适用场景：不适用于室外、腐蚀性空气或飞溅液体环境，主要用于高集成数据机房、无尘车间、设备内外通信及电气线路等场景。

　　Limitations and Applicable Scenarios: Not suitable for outdoor, corrosive air or splashing liquid environments, mainly used in highly integrated data centers, clean rooms, communication inside and outside equipment, and electrical circuits.

　　缆桥架安装关键技术规范

　　Key technical specifications for cable tray installation

　　（一）接地与跨接线要求

　　（1） Grounding and jumper wire requirements

　　跨接线连接细节：需使用抓垫、平垫，或刮除喷塑桥架表面漆层后，用平垫 + 弹簧垫压紧固定；

　　Details of jumper connection: It is necessary to use grab pads, flat pads, or scrape off the paint layer on the surface of the spray painted bridge, and then use flat pads and spring pads to press and fix it firmly;

　　严禁用连接螺栓直接固定跨接线，需单独设置压线装置，确保垫片顺序正确、螺栓外露长度合规，并标注接识。

　　It is strictly prohibited to directly fix the jumper wire with connecting bolts. A separate crimping device must be set up to ensure the correct sequence of gaskets, compliant exposed length of bolts, and marked with grounding identification.

　　接地干线连接：金属桥架及支架全长需不少于 2 处与接地（PE）或接零（PEN）干线连接；

　　Grounding main line connection: The total length of the metal bridge and bracket should be connected to the grounding (PE) or neutral (PEN) main line at no less than 2 places;

　　接地线小截面不小于 4mm?。

　　The minimum cross-sectional area of the grounding wire shall not be less than 4mm ?.

　　特殊接地要求：镀锌桥架连接板两端可不跨接接地线，但需保证不少于 2 个带防松螺帽或垫圈的固定螺栓（强标要求）；

　　Special grounding requirements: The two ends of the galvanized bridge connecting plate may not be connected to the grounding wire, but it is necessary to ensure that there are no less than 2 fixing bolts with anti loosening nuts or washers (mandatory requirements);

　　支架接地需在与桥架连接处刮除漆层（或用抓垫）确保导电连通；支架与铝合金桥架连接时，必须采取防电化腐蚀措施。

　　The bracket grounding needs to scrape off the paint layer (or use a scratch pad) at the connection with the bridge to ensure conductive connection; When connecting the bracket to the aluminum alloy bridge, measures must be taken to prevent electrochemical corrosion.

　　（二）安装基础规范

　　（2） Installation foundation specifications

　　整体要求：横平竖直，弯头过渡平缓；分层敷设时优先采用组合架。

　　Overall requirements: Horizontal and vertical alignment, smooth transition of bends; When laying in layers, priority should be given to using composite frames.

　　螺母朝向：连接螺母需位于桥架外侧。

　　Nut orientation: The connecting nut should be located on the outside of the bridge.

　　转弯处理：转弯处需增设支架，确保受力稳定。

　　Turning treatment: A bracket needs to be added at the turning point to ensure stable force distribution.

　　大型桥架特殊要求：配电室等场景的大型桥架应采用可调式组合支架；大型工程中桥架弯曲度需保持一致。

　　Special requirements for large cable trays: Adjustable combination brackets should be used for large cable trays in scenarios such as distribution rooms; The curvature of cable trays in large-scale projects needs to be consistent.

　　（三）防火与伸缩装置要求

　　（3） Requirements for Fire Protection and Expansion Devices

　　防火措施：桥架内部需增设防火封堵或防火包，阻断火势蔓延。

　　Fire prevention measures: Fireproof sealing or fireproof packaging should be added inside the bridge to block the spread of fire.

　　伸缩节设置：钢制桥架每 30 米、铝合金及塑料桥架每 15 米需加装伸缩节；穿越建筑物变形缝（伸缩缝、沉降缝）处必须设置补偿装置。

　　Expansion joint setting: Expansion joints need to be installed every 30 meters for steel cable trays and every 15 meters for aluminum alloy and plastic cable trays; Compensation devices must be installed at the deformation joints (expansion joints, settlement joints) crossing buildings.

　　（四）支架设置标准

　　（4） Bracket setting standards

　　间距要求：水平敷设支架间距为 1.5-3 米，垂直敷设为 2 米 / 个；

　　Spacing requirements: The spacing between horizontal laying brackets is 1.5-3 meters, and for vertical laying it is 2 meters per bracket;

　　转弯处加强：转弯节点需增设支架，确保桥架稳定；

　　Strengthening at turning points: additional brackets need to be added at turning nodes to ensure the stability of the bridge structure;

　　大型桥架支架：配电室等场景的大型桥架应采用可调式组合支架，保证承重均匀。

　　Large cable tray supports: Adjustable combination supports should be used for large cable trays in scenarios such as distribution rooms to ensure even load-bearing capacity.

　　桥架材质差异及选型要点

　　Differences in Bridge Materials and Key Selection Points

　　（一）镀锌桥架 vs 热镀锌桥架

　　（1） Galvanized bridge frame vs hot-dip galvanized bridge frame

　　项目镀锌桥架（冷镀锌）热镀锌桥架工艺差异电镀锌处理，锌层薄（外观光亮）热浸锌处理，锌层厚（镀层均匀）性能特点抗锈蚀能力较弱，寿命较短抗侵蚀、硬度、耐冲击性更优，寿命更长成本与应用成本低，为工程常规选择（默认镀锌桥架）成本高，仅用于高要求场景（需定制生产）

　　Project galvanized bridge (cold galvanizing) hot-dip galvanized bridge process difference: galvanizing treatment, thin zinc layer (bright appearance) hot-dip galvanizing treatment, thick zinc layer (uniform coating) performance characteristics: weak corrosion resistance, short service life, better corrosion resistance, hardness, impact resistance, longer service life, low application cost, and is a common choice for engineering (default galvanized bridge) with high cost, only used in high demand scenarios (customized production required)

　　（二）材质选型核心原则

　　（2） Core principles for material selection

　　重腐蚀环境优先选槽式桥架 + 热镀锌处理或铝合金桥架；

　　Priority should be given to using trough type cable trays with hot-dip galvanizing treatment or aluminum alloy cable trays in heavily corrosive environments;

　　高集成散热需求场景（如数据机房）选网格式桥架；

　　Select network format cable trays for high integration heat dissipation demand scenarios (such as data centers);

　　轻量化、抗干扰需求场景选铝合金桥架（需妥协防火性能）；

　　Choose aluminum alloy cable tray for lightweight and anti-interference demand scenarios (compromise fire performance);

　　常规弱电布线选槽式或托盘式桥架（根据线缆截面与数量匹配）。

　　Conventional weak current wiring should be selected as slot type or tray type cable trays (matching according to cable cross-section and quantity).

　　荷载等级与规格选择原则

　　Principles for selecting load levels and specifications

　　（一）荷载要求

　　（1） Load requirements

　　电缆桥架工作均布荷载不得超过所选型号的额定荷载；若支吊架实际跨距≠2 米，需重新核算荷载是否达标。组件及支吊架规格需与桥架直线段、弯通系列匹配。

　　The uniformly distributed load of cable tray work shall not exceed the rated load of the selected model; If the actual span of the support hanger is ≠ 2 meters, it is necessary to re calculate whether the load meets the standard. The specifications of components and support hangers should match the straight sections and bending series of the bridge.

　　（二）规格选择规范

　　（2） Specification selection criteria

　　根据《民用建筑电气设计规范》（JGJ16-2008）8.10.7 条规定：

　　According to Article 8.10.7 of the "Code for Electrical Design of Civil Buildings" (JGJ16-2008):

　　电力电缆总截面积与托盘内横断面积比≤40%；

　　The ratio of the total cross-sectional area of power cables to the cross-sectional area inside the tray is ≤ 40%;

　　控制电缆总截面积与托盘内横断面积比≤50%。

　　Control the ratio of the total cross-sectional area of the cable to the cross-sectional area inside the tray to be ≤ 50%.

　　选型时需避免 “偏大浪费” 或 “偏小过载”，严格按线缆总截面核算桥架尺寸。

　　When selecting, it is necessary to avoid "excessive waste" or "excessive overload", and strictly calculate the size of the cable tray according to the total cross-sectional area of the cable.

　　通过以上解析，可根据工程环境、线缆特性及规范要求，科学选择电缆桥架类型并规范安装，确保弱电

　　Based on the above analysis, it is possible to scientifically select the type of cable tray and install it in a standardized manner according to the engineering environment, cable characteristics, and regulatory requirements to ensure weak current

　　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.