The load carrying capacity of a helically reinforced column as compared to that of a tied column is about A. 5% less B. 10% less C. 5% more D. 10% more

The correct answer is C. 5% more.

Helically reinforced columns are more efficient than tied columns because the helical reinforcement provides additional confinement to the concrete. This confinement helps to prevent the concrete from cracking and spalling under load, which can lead to a loss of strength. As a result, helically reinforced columns can carry more load than tied columns.

The following are the brief explanations of each option:

• Option A: 5% less. This is incorrect because helically reinforced columns are more efficient than tied columns.
• Option B: 10% less. This is incorrect because helically reinforced columns are more efficient than tied columns.
• Option C: 5% more. This is the correct answer because helically reinforced columns are more efficient than tied columns.
• Option D: 10% more. This is incorrect because helically reinforced columns are more efficient than tied columns.