Question

The d/tw should be ___ to avoid buckling of compression flange into web when transverse stiffeners are not provided

(a) ≥ 500 εf^2

(b) ≤ 345 εf^2

(c) ≥ 345 εf^2

(d) ≤ 500 εf^2

This question was posed to me in a national level competition.

My doubt stems from Proportioning of Web & Flanges topic in portion Gantry Girders, Design of Plate Girders & Industrial Buildings of Design of Steel Structures

Answer 1

The correct option is (b) ≤ 345 εf^2

The best I can explain: To avoid buckling of compression flange into web when transverse stiffeners are not provided, d/tw ≤ 345 εf^2, where d is depth of web, εf = √(250/fyf), fyf is yield stress of compression flange.