How much stronger are bars than the same equivalent area of concrete?

How much stronger are bars than the same equivalent area of concrete?

• A. 20 Times Stronger
• B. 2 Times
• C. 5 Times
• D. 10 Times

Answer: (A)

Steel bars carry far more tensile load than the same cross-sectional area of concrete. Concrete is strong in compression but weak in tension, while steel has high tensile strength and ductility. A common rule of thumb in practice is that reinforcing steel is about 20 times stronger in tension than an equal area of concrete. This big difference is why we use steel reinforcement in concrete—to take the tensile forces and let concrete handle compression, creating a strong composite member. The other options understate the strength advantage typically taught for reinforcing bars.

Steel bars carry far more tensile load than the same cross-sectional area of concrete. Concrete is strong in compression but weak in tension, while steel has high tensile strength and ductility. A common rule of thumb in practice is that reinforcing steel is about 20 times stronger in tension than an equal area of concrete. This big difference is why we use steel reinforcement in concrete—to take the tensile forces and let concrete handle compression, creating a strong composite member. The other options understate the strength advantage typically taught for reinforcing bars.