Answer: D. Tubular Section
The most economical section for a column is tubular section.
The most economical section for a column is tubular section. The two main reasons why the tubular section is the most economical section are as below.
- Tubular sections have lesser area compared to other sections.
- The second moment of inertia of the tubular section is high because the area is distributed away from the axis.
The above-mentioned two features result in an increased radius of gyration of the section which makes it more economical compared to other sections.