璃钢电缆桥架是由树脂和玻璃纤维通过高温一次拉拔成型的，具有质量轻，抗老化，防腐蚀，绝缘等性能，一般玻璃钢桥架的密度也可称为重量实在1.85千克每立方米，意思就是每立方米重1.85千克，那么知道了这个密度有什么用呢，我们就可以算出买到的玻璃钢桥架的实际厚度到底够不够我们要求的厚度。
Glass steel cable tray is made of resin and glass fiber by one drawing at high temperature. It has the properties of light weight, anti-aging, anti-corrosion, insulation and so on. The density of glass steel cable tray can also be called as 1.85 kg/cubic meter, which means 1.85 kg/cubic meter weight. So we know what the density is used for. Then we can figure out that the actual thickness of the FRP bridge is not enough to meet our requirements.
一些公司采购时为了使璃钢电缆桥架的承重力更高会选择相比国家标准厚度更厚一些的桥架，生产厂家会告诉我们他家所生产的桥架的厚度，那么实际厚度到底够不够我们需要用到测厚仪或是卡尺才能知道，但是测厚仪这些专用的工具一般厂家没有，那么我们就可以用称重的方法来算了。
In order to make the glass steel cable bridge have higher bearing capacity, some companies will choose a thicker bridge than the national standard. The manufacturer will tell us the thickness of the bridge produced by his family. Then the actual thickness is not enough. We need to use thickness gauge or caliper to know, but thickness gauge is specialized. The tools used are not usually available from manufacturers, so we can use weighing method to calculate.