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When only transverse stiffeners are provided and d/tw < 345 εf to meet compression flange buckling criteria, the range of c should be(a) c ≥ 4.5d(b) c > 3d(c) c > 1.5d(d) c < 1.5dThis question was posed to me during an online exam.My question is taken from Proportioning of Web & Flanges topic in division Gantry Girders, Design of Plate Girders & Industrial Buildings of Design of Steel Structures

Answer»

The correct choice is (d) C < 1.5d

The explanation is: To avoid buckling of COMPRESSION FLANGE into web, d/tw ≤ 345 εf^2 for c ≥ 1.5d, d/tw < 345 εffor c < 1.5d when only transverse stiffeners are provided, where c is clear DISTANCE between stiffeners, d is depth of web, εf = √(250/FYF), fyf is yield stress of compression flange.



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