1.

The formula recommended by the British code BS: 8110 – 1985 for the estimation of surface crack width Wcr is:$

A. W<sub>cr</sub> = 3a<sub>cr</sub>ε<sub>m</sub> / 1+2(a<sub>cr</sub> – C<sub>min</sub>/h-x)
B. W<sub>cr</sub> = 3a<sub>cr</sub>ε<sub>m</sub>
C. W<sub>cr</sub> = 3a<sub>cr</sub>ε<sub>m</sub> / 1+2(a<sub>cr</sub> + C<sub>min</sub>/h-x)
D. W<sub>cr</sub> = 5a<sub>cr</sub>ε<sub>m </sub>
Answer» B. W<sub>cr</sub> = 3a<sub>cr</sub>‚âà√≠¬¨¬µ<sub>m</sub>


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