1) The width and height of the composite epoxy resin cable tray shall be selected according to the following table, and shall meet the requirements that the true charge rate of the cable shall not exceed the specified value of the relevant standards and specifications. The power cable may take 40-50%, the control cable may take 50-70%, and 10-25% of the process development margin shall be reserved.

2）各種彎通及附件規格應符合工程布置條件并與橋架相配套。

2) The specifications of various bends and accessories should comply with the engineering layout conditions and be matched with the bridge.

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 selection of support and hanger specifications should be based on conditions such as cable tray specifications, number of layers, and span. And it should meet the requirements of the load.

（3）對于電纜橋架的支、吊架的配置

(3) Configuration of supports and hangers of cable tray

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 suspension is generally 1.5-3m; The span of outdoor columns is generally 6 meters.

2）非直線段的支、吊架配置就遵循以下原則：當橋架寬度<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；當橋架寬度>300mm時，除符合下述條件外，在非直線段中部還應增設一個支、吊架。

2) The configuration of supports and hangers for non linear sections follows the following principles: when the bridge width is less than 300mm, a support or hanger should be set on the side of the straight section 300-600m away from the junction of the non linear section and the straight line; When the width of the bridge is greater than 300mm, in addition to meeting the following conditions, a support and hanger should also be added in the middle of the non linear section.

3）拉擠玻璃鋼電纜橋架多層設置時層間中心距為200，250，300，350mm。

3) The center distance between layers of pultruded glass fiber reinforced plastic cable tray is 200250300350mm.

4）橋架直線段每隔50m應予留伸縮縫20-30mm（金屬橋架）。

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

（4）關于線纜橋架的一些計算公式

(4) Some calculation formulas for cable trays

電纜橋架是用薄鋼板沖壓而成。其承載能力具有一定的限度。電纜橋架的載荷能力的大小是一個與橋架規格和支撐距離有關的量。對應于同一支撐距離和彎凸變形量，側面高度大的橋架承載能力大，高度小的橋架承載能力小。另外當載荷能力劃、相同時，對于同一規格的電纜橋架，支撐距離小的比支撐距離大的彎曲變形量小。一般情況下電纜橋架每隔1.5～2.0m安裝一組支撐架。

The cable tray is stamped with thin steel plate. Its carrying capacity has a certain limit. The load capacity of cable tray is a quantity related to the bridge specification and support distance. Correspondingly to the same support distance and bending deformation, the bridge with larger side height has higher bearing capacity, while the bridge with smaller height has lower bearing capacity. In addition, when the load capacity is the same, for the cable tray of the same specification, the bending deformation of the cable tray with smaller support distance is smaller than that with larger support distance. Generally, a group of support frames shall be installed every 1.5~2.0m for cable tray.