Question

A pretensioned plank $\left(depth{D}_1\right)$ is placed over simple supports and additional in situ concrete $\left(depth{D}_2\right)$ is laid on top. What is the probable shape of stress block on hardening of in situ concrete?

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

Pretensioned prestressed plank can resist both compressive and tensile stresses. However, pretensioning is done to keep the stresses compressive throughout the beam.