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When second longitudinal stiffener is provided, d/tw to meet serviceability criteria is(a) ≤ 400 εw(b) ≥ 400 εw(c) > 800 εw(d) ≤ 800 εwThe question was posed to me in an international level competition.This intriguing question originated from Proportioning of Web & Flanges topic in portion Gantry Girders, Design of Plate Girders & Industrial Buildings of Design of Steel Structures

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Right option is (a) ≤ 400 εw

Easiest EXPLANATION: When second longitudinal stiffener is provided at NEUTRAL axis, d/tw ≤ 400 εw to meet serviceability CRITERIA, where d is depth of web, εw = √(250/fyw), fyw is yield STRESS of web.



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