RCC Structures Design
With usual notations the depth of the neutral axis of a balanced section, is given by

mc/t = n/(d - n)
mc/t = (d - n)/n
t/mc = (d - n)/n
t/mc = (d + n)/n

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RCC Structures Design
If the shear stress in a R.C.C. beam is

Greater than 4 kg/cm², but less than 20 kg/cm², shear reinforcement is provided
Greater than 20 kg/cm², the size of the section is changed
All of these
Equal or less than 5 kg/cm², no shear reinforcement is provided

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