Which best describes a round smooth bar?

Which best describes a round smooth bar?

• A. Plain bar
• B. Deformed bar
• C. Spiral bar
• D. Composite bar

Answer: (A)

A round smooth bar is a plain reinforcing bar, identified by its smooth, unribbed surface. The surface texture is what sets rebar apart: deformed bars have ridges to grip concrete and improve bond, while plain bars rely on the concrete cover for bonding and are used in applications where high bond is not required. A spiral bar features a helical pattern and serves specialized purposes, and a composite bar uses different materials or construction. So, the round smooth surface describes a plain bar, which is why that choice is best.

A round smooth bar is a plain reinforcing bar, identified by its smooth, unribbed surface. The surface texture is what sets rebar apart: deformed bars have ridges to grip concrete and improve bond, while plain bars rely on the concrete cover for bonding and are used in applications where high bond is not required. A spiral bar features a helical pattern and serves specialized purposes, and a composite bar uses different materials or construction. So, the round smooth surface describes a plain bar, which is why that choice is best.