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Q: Which of the following assumptions is NOT valid in case of design of axially loaded compression members in the steel design?
  • A. The modulus of elasticity is assumed to be constant in a built-up column.
  • B. The ideal column is assumed to be absolutely straight with no crookedness.
  • C. The modulus of elasticity is assumed to vary in a built-up column.
  • D. Secondary stresses are neglected.
Correct Answer: Option C - The following assumptions are in the case of design of axially loaded compression members in the steel design – (1) The modules of elasticity is assumed to be constant in a built -up column. (2) The ideal column is assumed to be absolutely straight with no crookedness. (3) Secondary stresses are neglected.
C. The following assumptions are in the case of design of axially loaded compression members in the steel design – (1) The modules of elasticity is assumed to be constant in a built -up column. (2) The ideal column is assumed to be absolutely straight with no crookedness. (3) Secondary stresses are neglected.

Explanations:

The following assumptions are in the case of design of axially loaded compression members in the steel design – (1) The modules of elasticity is assumed to be constant in a built -up column. (2) The ideal column is assumed to be absolutely straight with no crookedness. (3) Secondary stresses are neglected.