Technical Note ETN-M-11-17 - 6 pp.; 2017
The Concrete Reinforcing Steel Institute (CRSI) routinely receives inquiries concerning various aspects of steel reinforcing bars, and reinforced concrete design and construction. This Technical Note presents a collection of typical questions that are asked regarding low-carbon, chromium steel, which is known as ASTM A1035 Types CS, CM and CL reinforcing bars. Most of these questions come from licensed design professionals (LDPs): structural engineers, architects, field personnel (inspectors, code enforcement personnel, and contractors), FHWA, USDOT, and US state and Canadian transportation agencies.
ASTM A1035 steel reinforcing bars provide a combination of high tensile strength to yield ratio and ductility. These material properties are a consequence of ASTM A1035’s chemistry and controlled rolling manufacturing process that result in a fine-grained lath martensite/austenite microstructure. Offering varying levels of corrosion- resistance, ASTM A1035 Type CS, CM, and CL bars are used in a wide range of reinforced concrete structures in different exposure conditions such as in high-rise towers, bridges, coastal marine structures and innovative design solutions using high strength efficiencies.