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

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Structural Analysis
Pick up the incorrect statement from the following:

The gross section of the web of plate girders is the depth of the web plate multiplied by its thickness
None of these
The gross section of the web of channels is the depth of the web multiplied by its thickness
The gross section of the web of rolled I-beams is the depth of the beam multiplied by the web thickness

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