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 measures such as painting fire-resistant coating on the surface of the bridge and its supports and hangers can be taken.

整体耐火性能应满足有关规范或标准的要求。在工程防火要求较高的场所.不宜采用铝合金电缆桥架。

The overall fire resistance performance shall meet the requirements of relevant codes or standards. It is not suitable to use aluminum alloy cable tray in places with high fire protection requirements.

在使用桥架的时候需要掌握的知识

Knowledge to master when using bridge

当电力电缆和控制电缆较少时,可同一电缆桥架安装,但中间要用隔板将电力电缆和控制电缆隔开敷设。

When there are few power cables and control cables, they can be installed on the same cable tray, but the power cables and control cables shall be laid separately with a partition in the middle.

选择电缆桥架宽度时应留有备用空位，以便为今后增添电缆用。

When selecting the width of cable tray, spare space should be reserved for adding cables in the future.

电缆桥架装置应有可靠接地。如利用桥架作为接地干线，应将每层桥架的端部用16mm2软铜线联接(并联)起来，与总接地干线相通，长距离的电缆桥架每隔30--50米接地一次。

The cable tray device shall be reliably grounded. If the cable tray is used as the grounding main line, the end of each layer of cable tray shall be connected (in parallel) with 16mm2 soft copper wire to connect with the main grounding main line, and the long-distance cable tray shall be grounded every 30-50m.

电缆桥架水平敷设时，桥架之间的连接头应尽量设置在跨距的1/4左右处,水平走向的电缆每隔2米左右固定一下，垂直走向的电缆每隔1.5米左右固定一下。

When the cable tray is laid horizontally, the connector between the cable trays should be set at about 1 / 4 of the span as far as possible. The horizontal cables should be fixed every 2 meters or so, and the vertical cables should be fixed every 1.5 meters or so.

电缆桥架装置除需屏蔽装保护罩外，在室外安装时应在其加装保护罩，防止日晒雨淋，对如需焊接安装时，焊件四周的焊缝厚度不得小于母材的厚度，焊口应做防腐处理。

In addition to shielding and protective cover, protective cover shall be installed on the top layer of cable tray device during outdoor installation to prevent sunlight and rain. When welding and installation is required, the thickness of weld around the weldment shall not be less than that of base metal, and the weld joint shall be treated with anti-corrosion.

在桥架内横断面的填充率：电力电缆不应大于40%;控制电缆不应大于50%,对于弱电线路可到60%。

The filling rate of the cross section in the cable tray: the power cable shall not be more than 40%; Control cable should not be more than 50%, for weak current lines can reach 60%.

上面是桥架的相关知识，希望能对您有所帮助，更多内容可以直接关注：http://www.sdhangfeng.com

The above is the bridge related knowledge, I hope it can help you, more content can be directly focused on: http://www.sdhangfeng.com