The application of cable bridge in our country is only more than ten years, and it is only decades in the prosperous countries of Europe and America. In a computer room project, compared with expensive and high-tech hardware and software, the bridge is not obvious and seldom paid attention to, but it is also an indispensable part of the whole wiring project. However, Shandong Cable Bridge Company reminds you that as a supporting project of wiring engineering, there is no specific standard guidance at present, and the specifications and procedures of various consumer manufacturers lack generality. Therefore, the design and selection process should be based on the type and number of weak current cables in each system, and the appropriate bridge should be selected reasonably.

一、电缆桥架型式及种类的选择

Selection of Cable Bridge Frame Types and Types

1、需屏蔽电气干扰的电缆网路或有防护外部（如：有腐蚀液休，易燃粉尘等环境）影响的请求时，应选用（FB）类槽式复合型防腐屏蔽电缆桥架（带盖）。

1. When a cable network with shielded electrical interference or a request for protection from external environment (such as corrosive liquid rest, combustible dust, etc.) is required, the (FB) groove type composite anti-corrosive shielded cable bridge (with cover) should be selected.

2、强腐蚀性环境应采用（F）类复合环氧树脂防腐阻燃型电缆桥架。托臂、支架也要选用同样资料，进步桥架及附件的运用寿命，电缆桥架。在容易积灰和其它需遮盖的环境或户外场所宜加盖板。

2. The (F) type composite epoxy resin anti-corrosion and flame-retardant cable bridge should be used in the corrosive environment. Brackets and brackets should also use the same information to improve the service life of bridge and accessories and cable bridge. Covering board should be added to the environment or outdoor places which are easy to accumulate dust and need to be covered.

3、除上述状况外，可依据现场环境及技术请求选用托盘式、槽式、梯级式、玻璃防腐阻燃电缆桥架或钢质普通型桥架。在容易积灰和其它需遮盖的环境或户外场所宜加盖板。

3. In addition to the above conditions, tray-type, trough-type, cascade-type, glass anti-corrosion and flame-retardant cable bridge or steel ordinary bridge can be selected according to the site environment and technical requirements. Covering board should be added to the environment or outdoor places which are easy to accumulate dust and need to be covered.

4、在公共通道或户外逾越道路段，底层梯级的底部宜加垫板或在该段运用托盘 。大跨距逾越公共通道时，可依据用户请求进步桥架的载荷才能或选用行架。

4. In the public passage or outdoor crossing road section, the bottom of the bottom step should be padded or pallets should be used in this section. When a long span crosses a public passage, the load of the bridge can be improved or the traveling frame can be selected according to the user's request.

5、大跨距（>3m）要选用复合型桥架（FB）。

5. Composite bridge (FB) should be selected for long span (>3m).

6、户外要选用复合环氧树指桥架（F）。

6. Composite epoxy tree finger bridge (F) should be used outdoors.

二、电缆桥架规格选择

II. Selection of Cable Bridge Frame Specifications

1、复合环氧树脂电缆桥架的宽度和高度就按下表选择，并应契合电缆真充率不超越有关规范标准的规则值，动力电缆可取40-50%，控制电缆可取50-70%，另外需予留10-25%的式程开展余量。

1. The width and height of composite epoxy resin cable bridge should be selected according to the table below. The true charge ratio of the cable should not exceed the rule values of relevant specifications. The power cable can be 40-50%, the control cable can be 50-70%, and the remaining 10-25% of the formula should be allowed.

2、各种弯通及附件规格应契合工程布置条件并与桥架相配套。

2. All kinds of bending and accessory specifications should conform to the engineering layout conditions and be matched with the bridge.

3、支、吊架规格的选择，应按桥架规格、层数、跨距等条件配置。并应满足荷载的请求。

3. The selection of support and hanger specifications should be based on the bridge specifications, layers, spans and other conditions. It should also satisfy the requirements of the load.

三、关于电缆桥架的支、吊架的配置

3. Configuration of Support and Suspension of Cable Bridge Frame

1、户内支、吊短跨距普通采取1.5-3m；户外立柱中跨距普通采取6m。

1. Short spans of indoor branches and suspensions are usually 1.5-3 m, while those of outdoor columns are 6 m.

2、非直线段的支、吊架配置就遵照以下准绳：当桥架宽度<300mm时，应在距非直线段与直线分离处300-600m的直线段侧设置一个支、吊架；当桥架宽度>300mm时，除契合下述条件外，在非直线段中部还应增设一个支、吊架。

2. When the width of the bridge is less than 300 mm, a support and hanger should be set at the side of the straight section 300-600 m away from the separation of the non-straight section and the straight line; when the width of the bridge is more than 300 mm, a support and hanger should be added in the middle of the non-linear section, in addition to the following conditions.

3、拉挤玻璃钢电缆桥架多层设置时层间中心距为200，250，300，350mm。

3. The center distance between layers is 200,250,300,350 mm when the multi-layers of the pull-extruded FRP cable bridge are set up.

4、桥架直线段每隔50m应予留伸缩缝20-30mm（金属桥架）。

4. The expansion joint should be 20-30 mm (metal bridge) for the straight section of the bridge every 50 m.

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The above content is provided by the arrangement of Shandong Cable Bridge Frame. I believe you have a certain understanding of it through our explanation. For more details, please pay attention to our official website: http://www.sdhangfeng.com! If you are satisfied with our service, please tell your friends around you. If you feel that our service is not good enough, you should help us improve it. We would appreciate it very much.