This Standard specifies the requirements for cold-formed, electric resistance-welded, carbon steel hollow sections used for structural purposes. It considers three strength grades, with or without impact properties, that are suitable for welding.

It is applicable to structural hollow sections formed cold without subsequent heat treatment.

The Standard does not cover submerged arc-welded, helically welded or U'ed and O'ed steel hollow sections.

NOTE: For guidelines on information to be supplied at the time of enquiry or order, see Appendix A.

Means for demonstrating conformance with this Standard are given in Appendix B.