ISO 14657:2005 specifies requirements for hot-dip zinc (galvanized) coating on steel reinforcing bars, wire and welded fabric used in the reinforcement of concrete.

It specifies three classes, class A, class B and class C coatings, which differ in coating mass.

ISO 14657:2005 does not apply to hot-dip zinc-coated reinforcements for prestressing or components of these reinforcements.