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- X] + (ae-1) A's(x-df + (ae"1) As(d-x)2 = 7535 x 106 mm4

For the cracked section the depth to the neutral axis is given by x

- = - [aep + (ae - 1)p'] +J [cy> + - 1)p']2 + 2[a^+(ae - ]

x = 0.345d = 134.6 mm The second moment of area of the cracked section is given by n bcf3

The moment which will cause cracking of the section is given by M

For concrete strength grade C30/37, f = 2.9 N/mm2

Therefore

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