Structural Analysis
When a uniformly distributed load, shorter than the span of the girder, moves from left to right, then the conditions for maximum bending moment at a section is that

the head of the load reaches the section
the load position should be such that the section divides the load in the same ratio as it divides the span
the load position should be such that the section divides it equally on both sides
the tail of the load reaches the section

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Structural Analysis
For under water concreting.

All of these
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
De-watering by pumping is not done or until 24 hours thereafter

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