Question

Two beams carrying identical loads, simply supported, are having same depth but beam A has double the width as compared to that of beam B. The ratio of the strength of beam A to that of beam B is

• A. 1/2
• B. 1/4
• C. 2
• D. 4

Answer 1

The correct option is C 2

Strength of a beam depends on its section modulus for same loading conditions.

$\therefore \frac{Z_A}{Z_B}=\frac{b_A{D}^2/6}{b_B{D}^2/6}=\frac{b_A}{b_B}=\frac{2b_B}{b_B}=2$