The surface of cable bridge is often brushed with fire retardant paint to achieve the purpose of fire prevention, but from the engineering practice of Shandong Cable Bridge Company, this method is unreliable!

1、防火涂料的厚度

1. Thickness of Fireproof Coatings

电缆桥架刷防火涂料，可参考《钢结构防火涂料应用技术规范》CECS 24:90，借鉴钢结构的一些经验。防火涂料的厚度与耐火极限有密切的关系，详见表1。问题来了，表1是对钢结构来说没有问题，涂层厚度与钢结构尺寸相比微乎其微，而电缆桥架所用材料只有几个毫米厚，表中厚涂型涂层厚度高可达50mm（对应耐火极限3h），这么厚的涂层如何刷到薄薄的电缆桥架上。

Brushing fire-retardant coatings for cable bridge can refer to CECS 24:90 of "Technical Specification for Application of Fire-retardant Coatings for Steel Structures" and draw on some experience of steel structures. The thickness of fire retardant coatings is closely related to the fire resistance limit, as shown in Table 1. The problem arises. Table 1 is no problem for steel structure. The thickness of coating is very small compared with the size of steel structure. The material used for cable bridge is only a few millimeters thick. The thickness of medium-thick coating can reach up to 50 mm (corresponding to the fire resistance limit of 3 hours). How can such a thick coating be brushed onto thin cable bridge?

2、现场施工的漏洞

2. loopholes in site construction

刷防火涂料需要工地现场施工，涂料是否刷的均匀关系防火的效果，这与工人的技术水平、责任心等有关。另外，桥架一般先安装，安装后靠近墙角、梁柱、其他管线、及吊杆处容易出现死角，不容易刷好涂料。

Brushing fire-retardant coatings requires site construction. The uniformity of paint brushing is related to the fire-retardant effect, which is related to the technical level and responsibility of workers. In addition, the bridge is generally installed first, after installation, near the corner of the wall, beam and column, other pipelines, and suspenders are prone to dead angle, it is not easy to brush paint.

刷完涂料的桥架，在敷设电缆或安装其他管道时容易将涂层破坏，失去防火作用，影响防护效果。

When the coated bridge is finished, it is easy to damage the coatings when laying cables or installing other pipelines, thus losing the fire protection effect and affecting the protection effect.

3、无法检测防火性能

3. Failure to detect fire protection performance

由于上述原因，工地刷的防火涂料无法检测其防火性能，不像成品的产品在出厂时有检验、检测，也有机构的检测。

Because of the above reasons, the fire-proof coatings of site brushes can not detect their fire-proof performance, unlike finished products, which are inspected and tested when they are out of the factory, there are also inspections by state authorities.

综上所述，电缆桥架现场刷防火涂层，其防火效果难以保证，需慎重使用！

To sum up, it is difficult to ensure the fire-proof effect of brushing fire-proof coating on the site of cable bridge, so it needs to be used cautiously.

以上就是由山东电缆桥架公司的小编给我们整理提供的精彩内容了，大家可以收藏我们的网站：http://www.sdhangfeng.com！了解更多行业前沿资讯，谢谢大家的支持！

Above is the wonderful content provided to us by the small edition of Shandong Cable Bridge Company. You can collect our website: http://www.sdhangfeng.com! To learn more about the industry frontier information, thank you for your support!