Column classification by slenderness ratio Select the threshold slenderness ratio at or above which a column is classified as a long column (Euler-type behavior dominates). Choose the correct value.

ConceptColumns are often categorized by slenderness ratio (l_e/k). For typical steels in basic design practice, members with slenderness ≳ 100 are treated as long columns, where elastic buckling dominates the failure mode and Euler-type formulas are applicable.

NoteExact limits can vary by code/material; among the given choices, 100 is the appropriate long-column threshold.

Final Answer100