When dealing with ICCP in atmospherically exposed concrete structures, which steel specification is relevant?

The relevant steel specification for impressed current cathodic protection (ICCP) in atmospherically exposed concrete structures is often related to the specific standards governing the use of materials in such environments. SPO290 addresses the requirements specifically for materials used in concrete applications subject to corrosion, particularly in the context of cathodic protection. This standard takes into account the interactions between the steel and the surrounding concrete, along with the effects of cathodic protection systems, ensuring that the steel can withstand the conditions it will face in service.

In contrast, ASTM A36 primarily pertains to structural steel used in general construction and does not specifically address conditions or requirements related to ICCP in concrete. A615 is focused on deformed and plain billet steel bars for concrete reinforcement but does not necessarily provide the comprehensive guidance needed for ICCP systems in atmospheric conditions. SPX200 is also not recognized as a standard relevant to this specific application. Therefore, SPO290 is the standard that is most relevant and critical for ensuring that the steel used in atmospherically exposed concrete structures will perform adequately with ICCP systems.