Question

If the average bending stress is 6 kg/cm2 for m 150 grade concrete, the length of embedment of a bar of diameter d according to i.S. 456 specications is

Answer 1

If the average bending stress is 6 kg/cm² for M-150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specications is 58d

Explanation:

Given that

Average bending stress for M-150 grade concrete, the average bending stress = 6 kg/cm²

Thus,

$\tau_{bd}=6$ kg/cm²

$\implies \tau_{bd}=0.6$ N/mm²

For Fe-250, the permissible stress

$\sigma_{st}=140$ N/mm²

∴ The development length

$L=\frac{\sigma_{st}\times d}{4\tau_{bd}}$

$\implies L=\frac{140\times d}{4\times 0.6}$

$\implies L=58d$

Hope this answer is helpful.

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