This standard specifies range, classification, code, technical requirement, dimension, shape, weight, permissible deviation and marking of cold formed steel hollow sections for general structure.
The standard is applicable to cold forming cold rolled or hot-rolled tandem rolling steel plate and steel Strip, and cold-rolled forming section manufactured in continuous cold-roll-forming machine group.
For cold formed steel hollow section specified by this standard, high frequency resistance welding is mainly adopted, and hydrogen arc welding or other welding methods may be adopted. This standard is not applicable to cold-rolled forming section manufactured through drawing, stamping, folding and so on.
