Question

As per IS 800:2007, shear lag effects in flanges may be disregarded for outstand elements if

(a) bo ≥ L0 / 20

(b) bo ≤ L0 / 20

(c) bo > L0 / 20

(d) bo = L0 / 10

I had been asked this question in an interview for internship.

My question is taken from Design Strength of Laterally Supported Beams in portion Design of Beams of Design of Steel Structures

Answer 1

Correct answer is (b) bo ≤ L0 / 20

For explanation I would say: As per IS 800:2007, shear lag effects in flanges may be disregarded for outstand elements if bo ≤ L0 / 20, where bo = width of flange outstand, L0 = length between points of zero moment in the span.