Question

The stregth os a beam is mainly depends on

• A. Bending moment
• B. Its weight
• C. Section modules
• D. C.G. of the section

Answer 1

Answer:

C. Section modules

Strength of a beam mainly depends on its section modulus, which can be expressed as Z = I/y Section modulus is more for a stronger beam. It depends on material, size and shape of cross-section. $Z = \frac Iy =\frac {(\pi d ^ 4)/64}{(d/2)}= (\pi d ^ 3)/32$