Question

The diameter of longitudinal bars of a column should never be less than _________

(a) 6 mm

(b) 8 mm

(c) 10 mm

(d) 12 mm

This question was posed to me in an internship interview.

I want to ask this question from Estimation in R.C.C. Structures topic in section Different Type Roofs, R.C.C of Civil Engineering Drawing

Answer 1

Right choice is (d) 12 mm

To explain: Due to buckling we don’t use diameter of longitudinal bars of a column less than 12 mm diameter.