Power fittings are graded by “nominal failure load”,
It means the maximum load that a piece of metal can bear.
According to GB2315-2017, it is divided into 18 grades.
Commonly used such as 70kN, 100kN, 120kN, 160kN and so on.
And since 1t = 9.8kN ≈ 10kN
Therefore, terms such as “7 tons, 10 tons” are used to describe the grade of the fittings.
It can be understood as the weight that a piece of gold can bear.
So let’s just take a random image,
The image above is not hard to spot:
A string of metal tools, insulators and wires,
Like a grasshopper on a rope.
So all the parties on the string should have the same tensile strength,
And neither side should be too strong nor too weak.
Too weak will be a weakness,
Too strong is a waste.
Post time: Jul-04-2022