Portable ladders shall comply to EN131 European norm, that is made up by seven sections.
EN131: it is the Euoropean reference norm for portable ladders. It is divided into seven sections and the first three are the most relevant:
EN131-1 describes the different types of ladders and the compulsory sizes for each type.
EN131-2 describes the compulsory product tests.
EN131-3 defines the standards on product marking.
EN131-4 concerns telescopic ladders
The maximum load of a EN131 product is 150 static Kg. It is the same, both for professional and domestic products.
Possible third party certification marks attest that there has been a control by an independent institute from the manufacturer. This is to verify periodically the quality of the product.
EN14183: it is the European reference norm for stepstools.
EN1004: it is the european reference norm for professional scaffoldings.