Before we have also introduced the u-shaped steel support , it is a cross section like the English letter "U "steel, the latest specification is released in 2008, in April 1, 2009 began to implement the national recommendation specification :GB/T 4697-2008. From this we can see that the manufacture of it should be very strict, but is it also very widely used?
Because the function and demand of u-shaped steel support itself are not known to be consistent, the section shape, parameters and raw materials of u-section steel vary from country to country. There are mainly 18U, 25U, 29U, 36U and 40U U section steels produced in China. But the carrying capacity of the 18U is so low that it is rarely produced today.
Although the type is not much, but the standard is more, but all have the characteristics of high pressure ability, long support time, easy device is not suitable for deformation. So, can you guess where it was first used?
U-shaped steel support is also a common advantage of u-section steel support, so it is mainly used for secondary support of mine roadway, mine roadway, as well as support support through mountain roadway, etc. In addition, as the primary section steel for making tunnel flexible metal support, U section steel support is widely used at home and abroad.
