The Most Economical Section for a Column is

Answer: D. Tubular Section

The most economical section for a column is tubular section.

Solution

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.

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