The minimum area of flange angles with cover plate for riveted/ bolted plate girder should be(a) 1/6^th of calculated flange area(b) 1/3^rd of calculated flange area(c) 1/8^th of calculated flange area(d) 1/4^th of calculated flange areaI had been asked this question in examination.My doubt is from Proportioning of Web & Flanges in section Gantry Girders, Design of Plate Girders & Industrial Buildings of Design of Steel Structures

The minimum area of flange angles with cover plate for riveted/ bolted

1.	The minimum area of flange angles with cover plate for riveted/ bolted plate girder should be(a) 1/6^th of calculated flange area(b) 1/3^rd of calculated flange area(c) 1/8^th of calculated flange area(d) 1/4^th of calculated flange areaI had been asked this question in examination.My doubt is from Proportioning of Web & Flanges in section Gantry Girders, Design of Plate Girders & Industrial Buildings of Design of Steel Structures
Answer» Correct CHOICE is (B) 1/3^rd of calculated flange area Explanation: Flanges of riveted/ bolted plate girder consists of pair of angles with or without cover plates. The flange angles should form as LARGE part of the area of the flange as practicable and PREFERABLY not less than 1/3rd of the calculated flange area to keep the centre of gravity of flange within back of angles and not in the flange cover plate else stability is affected.

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