Balanced section
Economic section
Critical section
All the above
Answer is Right!
Answer is Wrong!
The correct answer is C. Critical section.
A critical section is a section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stresses simultaneously.
A balanced section is a section of a reinforced beam where the maximum compressive stress in concrete is equal to the permissible compressive stress in concrete.
An economic section is a section of a reinforced beam where the cost of concrete and steel is minimum.
Therefore, the critical section is not necessarily a balanced section or an economic section.