Concrete Technology and Design of Concrete Structures
In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided on
i) bottom face near counterfort
ii) top face near counterfort
iii) bottom face near centre of span
iv) top face near centre of span
The correct answer is

only (ii)
both (ii) and (iii)
only (i)
both (i) and (iv)

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Concrete Technology and Design of Concrete Structures
According to IS : 456-1978, the fiexural strength of concrete is

inversely proportional to square root of compressive strength
directly proportional to square root of compressive strength
inversely proportional to compressive strength
directly proportional to compressive strength

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