Cable tray (cable tray) is the full name of rigid structure system with tight supporting cable, which is composed of straight section, bend, component, arm (arm support), hanger of tray or ladder.

产品选用要点

Key points of product selection

1)电缆桥架、线槽及其支吊架使用在有腐蚀性环境中，应采用耐腐蚀的刚性材料制造，或采取防腐蚀处理，防腐蚀处理方式应满足工程环境和耐久性的要求。

1) When cable tray, trunking and their supports and hangers are used in corrosive environment, they shall be made of corrosion-resistant rigid materials or treated with anti-corrosion treatment. The anti-corrosion treatment method shall meet the requirements of engineering environment and durability.

2)电缆桥架在有防火要求的区段内，可在电缆梯架、托盘内添加具有耐火或难燃性能的板、网等材料构成封闭或半封闭式结构，并采取在桥架及其支吊架表面涂刷防火涂层等措施，其整体耐火性能应满足有关规范或标准的要求。

2) In the section with fire protection requirements, the cable ladder and tray can be added with fire-resistant or flame-retardant plates, nets and other materials to form a closed or semi closed structure, and the fire-resistant coating shall be applied on the surface of the cable tray and its supports and hangers, and the overall fire resistance shall meet the requirements of relevant national codes or standards.

3)在工程防火要求较高的场所，不宜采用铝合金电缆桥架。

3) Aluminum alloy cable tray should not be used in places with high fire protection requirements.

4)电缆梯架宽度和高度的选择应符合填充率的要求，电缆的梯架的填充率在一般情况下，电力电缆可取40%～50%，控制电缆可取50%～70%，且宜预留10%～25%工程发展裕量。

4) The selection of cable ladder width and height shall meet the requirements of filling rate. Generally, the filling rate of cable ladder can be 40% - 50% for power cable and 50% - 70% for control cable, and 10% - 25% of engineering development margin should be reserved.

5)在选择电缆梯架的荷载等级时，电缆桥架的工作均布荷载不应大于所选电缆桥架荷载等级的额定均布荷载，如果电缆桥架的支吊架的实际跨距不等于2m时，则工作均布荷载应满足要求。

5) When selecting the load level of the cable ladder, the working uniform load of the cable tray shall not be greater than the rated uniform load of the selected load level of the cable tray. If the actual span of the support and hanger of the cable tray is not equal to 2m, the working uniform load shall meet the requirements.

6)各种组件及支吊架在满足相应荷载的条件下，其规格尺寸应与托盘、梯架的直线段、弯通系列相匹配

6) Under the condition of meeting the corresponding load, the specifications and dimensions of various components and supports and hangers shall match the straight section and bend through series of pallets and ladders

7)在选择电缆桥架的弯通或引上、引下装置时，不应小于电缆桥架内电缆小允许弯曲半径。

7) When selecting the bending or leading up and down devices of the cable tray, it should not be less than the small allowable bending radius of the cable in the cable tray.

8)对于跨距大于6m的钢制电缆桥架和跨距大于2m或承载要求大于荷载等级D级的铝合金电缆桥架，应按工程条件进行强度、刚度及稳定性的计算或试验验证。

8) For steel cable tray with span greater than 6m and aluminum alloy cable tray with span greater than 2m or bearing requirement greater than load level D, strength, stiffness and stability calculation or test verification shall be carried out according to engineering conditions.