Standards are essential in the world of steel construction: product characteristics, calculation methods, execution requirements, … are recorded in it. But keeping your collection of standards up to date is less easy: buying standards costs a lot of money, and on top of that there is a standard every month that is replaced by a newer version.
Standards are offered in “subscription form”: you have online access to a selection of 20 (or 60 or 100) standards, of which the latest version is always available for a fixed price per year (with an unlimited number of consultations).
As well NBN as NEN offer this service.