Question

What is a slender section?

(a) cross section which can develop plastic moment resistance

(b) cross section which can resist seismic force

(c) cross section in which elastically calculated stress in extreme compression fibre can reach yield strength

(d) cross section in which local buckling will occur before yield stress

I have been asked this question in unit test.

Asked question is from Cross Sectional Classification in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures

Answer 1

The correct choice is (d) cross section in which local buckling will occur before yield stress

The best explanation: Slender or class IV sections are cross section in which local buckling occurs even before the yield stress is attained in one or more parts of the cross section.