This British Standard provides recommendations for the design and construction of normal reinforced and prestressed concrete structures used for the containment or exclusion of aqueous liquids. The term “liquid” in this code of practice includes any contained or excluded aqueous liquids but excludes aggressive liquids. The standard does not cover dams, pipes, pipelines, lined structures, or the damp-proofing of basements. The term “structure” is used to mean the vessel that contains or excludes the liquid, and includes tanks, reservoirs, and other vessels.