The application of cable bridge in our country has only been more than ten years, and in developed countries in Europe and America, it is only a few decades. 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. The following is introduced to you by Jinan Cable Bridge Company: the selection principle of cable bridge, I hope to be helpful to you all!

一、电缆桥架型式及品种的选择

Selection of Types and Varieties of Cable Bridge Frames

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）影响的要求时，应选用（FB）类槽式复合型防腐屏蔽电缆桥架（带盖）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、支架也要选用同样材料，提高桥架及附件的使用寿命，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。

1. When cable networks need to shield from electrical interference or the requirements of protecting the external environment (such as corrosive liquid rest, flammable dust, etc.), the (FB) groove type composite anti-corrosion shielded cable bridge (with cover) strong corrosive environment should be selected, and the (F) type composite epoxy resin anti-corrosion and flame-retardant cable bridge should be adopted. Brackets and brackets should also use the same materials to improve the service life of the bridge and accessories, and cable bridge. Covering board should be added to the environment or outdoor places where dust is easily accumulated and other areas need to be covered.

2、在公共通道或户外跨越道路段，底层梯级的底部宜加垫板或在该段使用托盘。

2. In the public passage or outdoor crossing section, the bottom of the bottom step should be padded or pallets should be used in this section.

3、户外要选用复合环氧树指桥架（F）。

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

4、大跨距（>3m）要选用复合型桥架（FB）。

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

5、除上述情况外，可根据现场还环境及技术要求选用托盘式、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。

5. In addition to the above, 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 where dust is easily accumulated and other areas need to be covered.

6、大跨距跨越公共通道时，可根据用户要求提高桥架的载荷能力或选用行架。

6. When crossing a public passage with a long span, the load capacity of the bridge frame can be improved or the traveling frame can be selected according to the user's requirements.

二、规格选择

II. Specification Selection

1、各种弯通及附件规格应符合工程布置条件并与桥架相配套。

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

2、桥架的宽度和高度就按下表选择，并应符合电缆真充率不超过有关标准规范的规定值，动力电缆可取40-50%，控制电缆可取50-70%，另外需予留10-25%的式程发展余量。

2. The width and height of the bridge shall be selected according to the table below, and the true charge ratio of the cable shall not exceed the stipulated value of the relevant standards and specifications. The power cable shall be 40-50%, the control cable shall be 50-70%, and the remaining 10-25% of the formula development shall be allowed.

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

3. The selection of support and hanger specifications should be based on the bridge specifications, layers, spans and other conditions. And it should meet the requirements of load.

4、桥架横截面积的选择见表桥架上电缆网络中任一线路的大自动过电流保护的额定电流值或整定值（A）桥架横截面充许小值(mm2)0-60 12961-100 258101-200 452201-400 645401-600 968

4. Selection of the cross-section area of the bridge can be seen in the rated current value or setting value of the maximum automatic over-current protection for any line in the cable network on the bridge. (A) Allowable minimum value of the cross-section of the bridge (mm2) 0-60 12961-100 258101-200 452201-400 645401-600 968

三、支、吊架的配置

3. Configuration of brackets and hangers

1、户内支、吊短跨距一般采取1.5-3m。户外立柱中跨距一般采取6m。

1. Short span of indoor branch and suspension is generally 1.5-3 M. The span of outdoor column is usually 6 m.

2、非直线段的支、吊架配置就遵循以下原则。当桥架宽度<300mm时，应在距非直线段与直线结合处300-600m的直线段侧设置一个支、吊架。当桥架宽度>300mm时，除符合下述条件外，在非直线段中部还应增设一个支、吊架。

2. The support and hanger configuration of non-linear section follows the following principles. When the width of the bridge is less than 300 mm, a support and hanger should be set on the side of the straight section 300-600 m away from the joint of the non-linear section and the straight line. When the width of the bridge is more than 300 mm, in addition to meeting the following conditions, there should be an additional support and hanger in the middle of the non-linear section.

3、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 multi-layers of 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.

感谢您的阅读与观看，本文的精彩内容来自：济南电缆桥架公司，我们会有更多的精彩内容继续为您呈现，详情请点击：http://www.sdhangfeng.com

Thank you for your reading and watching. The wonderful content of this article comes from Jinan Cable Bridge Company. We will continue to show you more wonderful content. For more details, please click: http://www.sdhangfeng.com.