Material quality
Steel selection: the material of Support Arch is usually high-quality steel, and its quality directly affects the strength and life of the whole Support Arch. Therefore, the selection should ensure that the steel has good mechanical properties and corrosion resistance.
Material certification: Suppliers are required to provide material certification of Steel Arch Support, including chemical composition, mechanical properties and other key indicators to ensure that the material complies with relevant standards and regulations.
Second, the model and size
Common models: The common models of Steel Arch Support are U25, U29, U36, etc. These models differ in height, weight, thickness, etc. to meet different Steel Arch Support needs.
U25 type steel support: weight is 25Kg/m, height is 110mm, thickness is generally 17mm (there are other thicknesses, according to the specific product to determine), suitable for general Steel Arch Support
U29 type steel support: weight 29Kg/m, height 124mm, thickness 16mm, support strength is higher than U25 type, applicable to the need for stronger support occasions.
U36 type steel support: weight is 36Kg/m, height is 138mm, thickness is 17mm, it is the one with the highest supporting strength, suitable for deep and complex tunnel and soft coal seam tunnel and other high stress environment.
Size determination: Determine the size of the support according to the actual needs to ensure that the Support Arch can meet the support requirements. This includes the height, width, thickness and the size of the connectors.
