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What is the section modulus 'S' for a rectangular cross sectional beam having width 'b’ and depth 'h’?
  • a)
    S = bh3/12
  • b)
    S = bh3/6
  • c)
    S = bh2/6
  • d)
    S = bh2/24
Correct answer is option 'C'. Can you explain this answer?
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What is the section modulus S for a rectangular cross sectional beam h...
Section Modulus
Section modulus is defined as the ratio of the moment of inertia of a beam about its C.G to the maximum distance of the extreme x-section of the beam (Ymax).
Mathematically, S = Ixx/ymax.

Section modulus S is the ratio of Moment of inertia to distance from NA to extreme fiber

For a rectangular section, beam width = b, depth = h,
I = bh3/12 and y = h/2
So 
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What is the section modulus S for a rectangular cross sectional beam having width b’ and depth h’?a)S = bh3/12b)S = bh3/6c)S = bh2/6d)S = bh2/24Correct answer is option 'C'. Can you explain this answer?
Question Description
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