How many times the compressive weight does steel have compared to concrete?

Steel has a significantly higher compressive strength compared to concrete, which is a key reason for its use in construction. The typical compressive strength of concrete ranges from about 20 to 40 MPa (Megapascals) depending on its mix and curing conditions. On the other hand, the compressive strength of structural steel is approximately 250 to 350 MPa or more.

When comparing the compressive strength of steel to that of concrete, steel's strength can be around 10 to 15 times higher than that of typical concrete. In many contexts, it is common to reference steel as having about 15 times the compressive strength of concrete, which accurately reflects the material properties and strengths involved.

Thus, the choice indicating that steel has 15 times the compressive strength of concrete aligns well with established engineering principles and material characteristics, making it the most accurate representation in this particular context.