Structural Analysis
For under water concreting.

The volume of coarse aggregates shall not be less than one and half times and not more than twice that of fine aggregate
At least 10 percent more cement is required as compared to dry conditions
All of these
De-watering by pumping is not done or until 24 hours thereafter

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Structural Analysis
Pick up the correct statement for the web stiffeners.

All of these
Vertical stiffeners are spaced at a distance not greater than 1.5 d and not less than 0.33 d
d is the distance between flange angles or the clear distance between flanges
For horizontal stiffeners, d is the clear distance between the horizontal stiffener and the tension flange

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