Partial safety for concrete and steel are 1.5 and 1.15 respectively, because

Partial safety for concrete and steel are 1.5 and 1.15 respectively, because

a) Concrete is heterogeneous while steel is homogeneous

b) The control on the quality of concrete is not as good as that of steel   (Ans)

c) Concrete is weak in tension

d) Voids in concrete are 0.5% while those in steel are 0.15%