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Q: In laced columns, end tie plates are provided to check/keep:
  • A. column components in position
  • B. buckling of component column
  • C. the distortion of the column sections at ends because of unbalanced horizontal force from lacings
  • D. buckling of column as a whole
Correct Answer: Option C - • In laced columns, end tie plates are provided to check/keep the distortion of the column sections at ends because of unbalanced horizontal force from lacings. • The slenderness ratio of the component members in case of laced built-up columns, should not exceed 50 or 0.7 times the unfavorable slenderness ratio of the column as the whole. • Lacing should be inclined at an angle of 400–700 with the longitudinal axis of column.
C. • In laced columns, end tie plates are provided to check/keep the distortion of the column sections at ends because of unbalanced horizontal force from lacings. • The slenderness ratio of the component members in case of laced built-up columns, should not exceed 50 or 0.7 times the unfavorable slenderness ratio of the column as the whole. • Lacing should be inclined at an angle of 400–700 with the longitudinal axis of column.

Explanations:

• In laced columns, end tie plates are provided to check/keep the distortion of the column sections at ends because of unbalanced horizontal force from lacings. • The slenderness ratio of the component members in case of laced built-up columns, should not exceed 50 or 0.7 times the unfavorable slenderness ratio of the column as the whole. • Lacing should be inclined at an angle of 400–700 with the longitudinal axis of column.