British Standards Document
BS 7668
Weldable structural steels. Hot finished structural hollow sections in weather resistant steels. Specification

https://doi.org/10.3403/30338306U

BS 7668 is maintained by ISE/103. The current release of this standard is:

BS 7668:2016 Weldable structural steels. Hot finished structural hollow sections in weather resistant steels. Specification

https://doi.org/10.3403/30338306 (published 30/09/2016)

This standard is available from the following sources:

Other historical versions of this standard document also exist:

BS 7668:2004 [current until 30/09/2016]
BS 7668:1994 [current until 23/04/2004]