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Q: If the thickness of a structural member is small as compared to its length and width, it is classified as ..........
  • A. one dimensional
  • B. two dimensional
  • C. three dimensional
  • D. None of these
Correct Answer: Option B - If the thickness of a structural member is small as compared to its length and width, it is classified as two dimensional. – Beam is a structural member for the frame or structure of steel or concrete which has one dimension (length) considerably larger than the other of two dimensions (length) considerably larger than the other of two dimensions. It is called one dimensional structure. Such stress undergo plain stress condition hence stress in lateral dimension is zero as there is no area to provide the resisting force.
B. If the thickness of a structural member is small as compared to its length and width, it is classified as two dimensional. – Beam is a structural member for the frame or structure of steel or concrete which has one dimension (length) considerably larger than the other of two dimensions (length) considerably larger than the other of two dimensions. It is called one dimensional structure. Such stress undergo plain stress condition hence stress in lateral dimension is zero as there is no area to provide the resisting force.

Explanations:

If the thickness of a structural member is small as compared to its length and width, it is classified as two dimensional. – Beam is a structural member for the frame or structure of steel or concrete which has one dimension (length) considerably larger than the other of two dimensions (length) considerably larger than the other of two dimensions. It is called one dimensional structure. Such stress undergo plain stress condition hence stress in lateral dimension is zero as there is no area to provide the resisting force.