Question

The depth-to-thickness ratio of web when only transverse stiffeners are provided and 3d ≥ c ≥d, where c is clear distance between stiffeners and d is depth of web is_____ to meet serviceability criteria

(a) ≤ 200εw

(b) ≥ 200 εw

(c) > 200 εw

(d) ≤ 400 εw

This question was addressed to me in an interview for job.

My question is based upon Proportioning of Web & Flanges topic in division Gantry Girders, Design of Plate Girders & Industrial Buildings of Design of Steel Structures

Answer 1

Correct answer is (a) ≤ 200εw

The best explanation: For serviceability criteria, when only transverse stiffeners are provided, the depth-to-thickness ratio of web should be ≤ 200 εw, when 3d ≥ c ≥d and for c > 3d, the web is considered as unstiffened, where c is clear distance between stiffeners and d is depth of web, εw = √(250/fyw), fyw is yield stress of web.