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、電纜橋架型式及種類的選擇

Selection of Cable Bridge Frame Types and Types

1、需屏蔽電氣干擾的電纜網(wǎng)路或有防護外部（如：有腐蝕液休，易燃粉塵等環(huán)境）影響的請求時，應(yīng)選用（FB）類槽式復合型防腐屏蔽電纜橋架（帶蓋）。

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、強腐蝕性環(huán)境應(yīng)采用（F）類復合環(huán)氧樹脂防腐阻燃型電纜橋架。托臂、支架也要選用同樣資料，進步橋架及附件的運用壽命，電纜橋架。在容易積灰和其它需遮蓋的環(huán)境或戶外場所宜加蓋板。

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、除上述狀況外，可依據(jù)現(xiàn)場環(huán)境及技術(shù)請求選用托盤式、槽式、梯級式、玻璃防腐阻燃電纜橋架或鋼質(zhì)普通型橋架。在容易積灰和其它需遮蓋的環(huán)境或戶外場所宜加蓋板。

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、在公共通道或戶外逾越道路段，底層梯級的底部宜加墊板或在該段運用托盤 。大跨距逾越公共通道時，可依據(jù)用戶請求進步橋架的載荷才能或選用行架。

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）要選用復合型橋架（FB）。

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

6、戶外要選用復合環(huán)氧樹指橋架（F）。

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

二、電纜橋架規(guī)格選擇

II. Selection of Cable Bridge Frame Specifications

1、復合環(huán)氧樹脂電纜橋架的寬度和高度就按下表選擇，并應(yīng)契合電纜真充率不超越有關(guān)規(guī)范標準的規(guī)則值，動力電纜可取40-50%，控制電纜可取50-70%，另外需予留10-25%的式程開展余量。

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、各種彎通及附件規(guī)格應(yīng)契合工程布置條件并與橋架相配套。

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

3、支、吊架規(guī)格的選擇，應(yīng)按橋架規(guī)格、層數(shù)、跨距等條件配置。并應(yīng)滿足荷載的請求。

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、關(guān)于電纜橋架的支、吊架的配置

3. Configuration of Support and Suspension of Cable Bridge Frame

1、戶內(nèi)支、吊短跨距普通采取1.5-3m；戶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、非直線段的支、吊架配置就遵照以下準繩：當橋架寬度<300mm時，應(yīng)在距非直線段與直線分離處300-600m的直線段側(cè)設(shè)置一個支、吊架；當橋架寬度>300mm時，除契合下述條件外，在非直線段中部還應(yīng)增設(shè)一個支、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、拉擠玻璃鋼電纜橋架多層設(shè)置時層間中心距為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、橋架直線段每隔50m應(yīng)予留伸縮縫20-30mm（金屬橋架）。

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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