Key to selection of trough cable tray

1.槽式電纜橋架及其支吊架運用在有腐蝕性環(huán)境中，應選用耐腐蝕的剛性資料制作，或采納防腐蝕處理，防腐蝕處理方式應滿意工程環(huán)境和耐久性的要求。

1. When the trough cable bridge and its support and hanger are used in corrosive environment, the corrosion-resistant rigid data should be selected to make, or anti-corrosion treatment should be adopted. The anti-corrosion treatment method should satisfy the requirements of engineering environment and durability.

2.電纜橋架在有防火要求的區(qū)段內，可在電纜梯架、托盤內添加具有耐火或難燃功能的板、網(wǎng)等資料構成關閉或半關閉式結構，并采納在橋架及其支吊架表面涂刷防火涂層等辦法，其全體耐火功能應滿意有關規(guī)范或規(guī)范的要求。

2. In the section where the fire-proof requirement exists, the cable bridge frame can be closed or semi-closed by adding fire-resistant or flame-retardant materials such as plates and nets into the cable ladder and tray, and by coating the surface of the bridge frame and its supporting suspension frame with fire-proof coating, the fire-proof function of the cable bridge frame should be satisfied with the requirements of relevant national codes or codes. Please.

3.在工程防火要求較高的場所，不宜選用鋁合金電纜橋架。

3. aluminum alloy cable bridge should not be used in places where fire safety requirements are high.

4.槽式電纜橋架寬度和高度的挑選應契合填充率的要求，電纜的梯架和托盤內的填充率在一般情況下，電力電纜可取40%～50%，操控電纜可取50%～70%，且宜預留10%～25%工程發(fā)展裕量。

4. The selection of the width and height of the trough cable bridge should meet the requirements of the filling rate. The filling rate in the cable ladder and tray can be 40%-50% for the power cable, 50%-70% for the control cable, and 10%-25% for the project development margin should be reserved.

5.在挑選電纜橋架的荷載等級時，電纜橋架的作業(yè)均布荷載不該大于所選電纜橋架荷載等級的額定均布荷載，假如電纜橋架的支吊架的實踐跨距不等于2m時，則作業(yè)均布荷載應滿意要求。

5. When choosing the load grade of cable bridge, the uniformly distributed load of cable bridge should not be greater than the rated uniformly distributed load of the selected cable bridge load grade. If the practical span of the suspension frame of cable bridge is not equal to 2 m, the uniformly distributed load of the operation should be satisfied.

6.各種組件及支吊架在滿意相應荷載的條件下，其規(guī)格尺度應與托盤、梯架的直線段、彎通系列相匹配。

6. Under the condition of satisfying the corresponding load, the specifications of various components and hangers should match the straight line segment and bending series of pallets, ladders.

7.在挑選槽式電纜橋架的彎通或引上、引下設備時，不該小于電纜橋架內電纜小答應曲折半徑。8）關于跨距大于6m的鋼制電纜橋架和跨距大于2m或承載要求大于荷載等級D級的鋁合金電纜橋架，應按工程條件進行強度、剛度及穩(wěn)定性的計算或試驗驗證。

7. The minimum allowable bending radius of cables in the cable bridge should not be less than that of the cable in the cable bridge when selecting the bending or leading up and setting down the equipment of the slot cable bridge. 8) The strength, stiffness and stability of steel cable bridges with spans greater than 6 m and aluminum alloy cable bridges with spans greater than 2 m or load-bearing requirements greater than grade D should be calculated or tested according to engineering conditions.

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