Structural Analysis
Principle of superposition is applicable when

None of these
The action of applied forces will be affected by small deformations of the structure
Material obeys Hooke's law
Deflections are linear functions of applied forces

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

For horizontal stiffeners, d is the clear distance between the horizontal stiffener and the tension flange
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
All of these

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