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Load capacity covers

According to the latest national standard GB latest standards / T23858-2009 and

Manhole cover load capacity can be divided into the following categories:

One thing description, covers load capacity and capability of the vehicle through the covers is not a concept.

It covers load capacity refers in the unit area by pressure testing machine pressure test, usually heavy 40 tons. And if it is by car,

5-axis heavy-duty trucks formula: 5-axis x40 t = 200 tons. In total vehicle weight 200T tonnage can be ensured by the heavy covers.

And some manufacturers said 80 tons technical parameters of the vehicle, if divided by 5-axis, so it covers the factory out of the load: 80t / 5 = 16t, which indicates, covers only 16 tons load itself.