Mining i beam: mining i beam is commonly referred to mine steel, it is a type of mine steel, mainly used for the support of mine tunnel, flange width, height and thickness.

Basic information:

1, standard: YB/T24-1986/2

2, size specification: 

2, The bending of the steel shall not be greater than 1.0mm.

3, The eccentricity of the steel shall not exceed 2% of the width of the legs. Degree of eccentricity: =b2-b1/2.

4, The bending degree of the steel shall not be greater than 3mm, total curvature must not exceed 0.3 percent.

3, mark and component

The standard is different

The atandard of common i beam steel: GB/T706-2008(PRC standard)

Technical conditions of steel trapezoidal rigid brackets for mining industry: MT194-2000(Standards of the coal industry in the People's Republic of China)