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Which of the following statement is not correct?

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in Design of Steel Structures by (962k points)
Which of the following statement is  not correct?

(a) Hollow circular tube has more efficiency as flexural member

(b) Hollow circular tube has lesser efficiency as flexural member

(c) It is the most efficient shape for torsional resistance

(d) It us rarely used as a beam element

I had been asked this question in semester exam.

This is a very interesting question from Factors affecting Lateral Stability topic in division Design of Beams of Design of Steel Structures

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Correct answer is (a) Hollow circular tube has more efficiency as flexural member

Explanation: Hollow circular tube is the most efficient shape for torsional resistance, but is rarely employed as beam element because of difficulties encountered in connecting it to other members and lesser efficiency as a flexural member.

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