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Structural Design Specifications - Engineering

Q1:

For the reinforced concrete member totally immersed in sea water, the normal cover provided for the reinforcing bars is further increased by

A 10 mm

B 20 mm

C 30 mm

D 40 mm

E 50 mm

ANS:D - 40 mm

25 is the right answer because in this question additional cover were asked not nominal cover.