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Flange cover plates are used in plate girder when

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in Design of Steel Structures by (962k points)
Flange cover plates are used in plate girder when

(a) flange cover plates are not used

(b) for aesthetic appearance

(c) when moment resisting capacity has to be increased

(d) when moment resisting capacity has to be decreased

I have been asked this question in exam.

My question comes 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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The correct option is (c) when moment resisting capacity has to be increased

The explanation: When moment resisting capacity of the plate girder has to be increased, flange cover plates are provided over flange angles. The moment of inertia and consequently the moment resisting capacity of the girder is increased considerably as the flange cover plates are at the greatest distance from neutral axis.

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