槽式电缆桥架荷载等级的标准
1) trough type cable tray and its support and hangers should be made of corrosion-resistant rigid material or corrosive treatment. Corrosive treatment should 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) cable tray in a fire in the section, the cable tray ladder, added with fire or flame retardant properties of the plate, net material enclosed or semi enclosed structure, and take on the bridge and the support surface coated with fireproof coating and other measures, the overall performance should meet the requirements of the relevant national fire code or standard.
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 bridge should not be used in places with higher fire protection requirements.
4)槽式电缆桥架宽度和高度的选择应符合填充率的要求，电缆的梯架和托盘内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 choice of width and height of the trough cable bridge should meet the requirement of filling rate. In the general condition, the power cable should be 40% to 50%, and the control cable should be 50% to 70%, and the 10% to 25% engineering development allowance should be reserved.
5)在选择电缆桥架的荷载等级时，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 cable tray, the load distribution of the cable tray should not be greater than the rated load of the selected cable bridge load grade. If the actual span of the support and hanger of the cable bridge is not equal to 2m, the uniform load should 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) the specifications and sizes of various components and support frames should be matched with the line and bend series of the tray, the ladder frame and the staircase.
7)在选择槽式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) the minimum allowable bending radius of the cable in the cable bridge should not be less than that of the cable bridge.
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 the steel cable bridge with span greater than 6m and the span length greater than 2m or the load bearing requirement is greater than the load grade D grade aluminum alloy cable tray, the strength, stiffness and stability of the aluminum alloy cable bridge should be calculated or verified according to the engineering conditions.
9)几组电缆桥架在同一高度平行敷设时，各相邻电缆桥架之间应考虑维护、检修距离。
9) the distance of maintenance and maintenance should be considered between the adjacent cable bridges when the cable bridges are laid at the same height parallel to the same height.
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