Structural Analysis
When a series of wheel loads crosses a simply supported girder, the maximum bending moment under any given wheel load occurs when

The centre of gravity of the load system is midway between the centre of span and wheel load under consi-deration
The wheel load under consideration is midway between the centre of span and the centre of gravity of the load system
The centre of span is midway between the centre of gravity of the load system and the wheel load under consideration
None of these

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

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

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