Structural Analysis
The Castigliano's second theorem can be used to compute deflections

For beams and frames only
In statically determinate structures only
At the point under the load only
For any type of structure

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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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