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GATE 2019 CE (CE2) – Question 16

Steel Structures · Design of tension and compression members · 1 mark · Multiple choice

A steel column is restrained against translation and rotation at one end; the other end is restrained against rotation but free to translate. Find theoretical and design effective-length factors, respectively, under IS 800:2007.

  1. 1.0 and 1.0
  2. 1.2 and 1.0
  3. 1.2 and 1.2
  4. 1.0 and 1.2

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Correct answer: (C) 1.2 and 1.2; (D) 1.0 and 1.2

Explanation

For a fixed end and a rotation-restrained translating end, classical effective length is L, giving theoretical K = 1.0. The stated design factor is 1.2, supporting **D**. The appended final key also accepts **C (1.2, 1.2)**. Both official alternatives are preserved while distinguishing the classical theoretical factor.