FRP electric bridge is widely used in our daily life, and the specifications are also complex, which leaves us a difficult problem in the selection of specifications. So, how to choose the specification of cable tray?

一、規格的選擇

1、 Selection of specifications

1、橋架的寬度和高度就按公認的表格選擇，并應符合電纜填充率不超過有關標準規范的規定值，動力電纜可取40-50%，控制電纜可取50-70%，另外需予留10-25%的式程可供發展余量。

1. The width and height of the cable tray shall be selected according to the recognized official form, and the cable filling rate shall not exceed the specified value of relevant standards and specifications. The power cable can be 40-50%, the control cable can be 50-70%, and 10-25% margin shall be reserved for development.

2、各種彎通及附件規格應符合工程布置條件并與玻璃鋼電纜橋架相配套。

2. The specifications of various bends and accessories shall meet the engineering layout conditions and be matched with FRP cable tray.

3、支、吊架規格的選擇，應按橋架規格、層數、跨距等條件配置。并應滿足荷載的要求。

3. The specifications of supports and hangers shall be selected according to the specifications, layers and spans of the bridge. And it should meet the load requirements.

4、橋架橫截面積的選擇見規范表。

4. The selection of bridge cross-sectional area is shown in the official specification table.

二、支、吊架的配置選擇

2、 Selection of support and hanger configuration

1、戶內支、吊短跨距一般采取1.5-3m。戶外立柱中跨距一般采取6m。

1. The short span of indoor support and hoisting is generally 1.5-3m. The middle span of outdoor column is generally 6m.

2、非直線段的支、吊架配置就遵循以下原則：當玻璃鋼電纜橋架寬度<300mm時，應在距非直線段與直線結合處300-600m的直線段側設置一個支、吊架。當玻璃鋼電纜橋架寬度>300mm時，除符合相關條件外，在非直線段中部還應增設一個支、吊架。

2. The support and hanger configuration of non-linear section shall follow the following principles: when the width of FRP cable tray is less than 300 mm, a support and hanger shall be set at the side of the straight section 300-600 m away from the joint of non-linear section and straight line. When the width of FRP cable tray is more than 300 mm, in addition to meeting the relevant conditions, a support and hanger should be added in the middle of the non-linear section.

3、橋架多層設置時層間距為200，250，300，350mm。

3. When the cable tray is set in multiple layers, the center distance between layers is 200250300350mm.

4、橋架直線段每隔50m應予留伸縮縫20-30mm（金屬橋架）。

4. Expansion joints of 20-30mm (metal bridge) shall be reserved every 50m in the straight section of the bridge.

以上就是小編為大家介紹的關于電纜橋架規格內容介紹，希望可以幫助到大家。

The above is a small series for you to introduce the cable tray specifications, hope to help you.