Channel section steel is a kind of economic cross section steel, the products are widely used in automobile, aviation, light industry, machinery manufacture and construction areas.

Fifth one is the marketing channel tactics of iron and steel product. In this section mainly discussing the importance of the middleman and how to obtain win-win tactics.

This paper presents precise analysis on wall girder torsion of cold bend thin-section steel channel of 2 or 3 continuous bays commonly used.