This standard applies to the protection from corrosion of supporting thin-walled building components made from steel, the nominal sheet thickness of which is up to 3 mm and which are subjected to atmospheric corrosion stress. The building components are manufactured from steel coated by zinc (hot-dip galvanizing) or zinc alloys and having afterwards either coil-coated or coated by piece-work coating at plant or site, using metallic coatings, organic coatings or metallic and organic coatings (duplex systems).