​U-shaped steel is a kind of steel whose cross section resembles the English letter "U".

        U-shaped steel (full name: hot-rolled U-shaped steel for mine roadway support) U-shaped steel is a kind of steel with a cross section like the English letter "U", sometimes in the shape of the Japanese letter "ひ" in cross section. The latest standard is the national recommended standard GB/T 4697-2008 issued in 2008 and implemented on April 1, 2009

        Main features: high pressure, long support time, easy to install and not easy to deform.

        Main uses: Mainly used for mine tunnels, secondary support of mine tunnels, and support and support of mountain tunnels.

        As the main section steel for manufacturing roadway shrinkable metal supports, U-section steel is widely used at home and abroad. However, due to the inconsistent understanding of the performance and requirements of U-shaped steel itself, the cross-sectional shape, geometric parameters and material of U-shaped steel vary from country to country.