Material:20 MnK U steel support is a kind of passive support of coal mine support, the tensile strength and the compressive strength is higher, it also has good toughness properties, the support force is higher, the support strength is higher, can used for many times, widely used in mine tunnel, especially in deep complex tunnel and loose coal seam tunnel. Application: U36 steel support is mainly used for mine tunnel, mine tunnel secondary support, as well as support through the mountain tunnel support purposes. U-shaped steel bracket Features: withstand pressure, support long time, easy to install and easy to deformation characteristics. 36U steel frame consists of a roof beams, two legs, four card cable, two bottom feet composition. Mainly used in mine tunnel, mine tunnel secondary support, as well as support through the mountain tunnel support and so on.