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Question
In a plate girder subjected to a bending moment of 200 kNm, the width and thickness of flange are 200 mm and 10 mm respectively. What is the economical depth of the girder by assuming the moment is resisted by the flange only?  [Take fy = 250 MPa]
A.
800 mm
B.
400 mm
C.
500 mm
D.
700 mm
Answer ( Option B)

400 mm

Solution

The depth of plate girder can be calculated by directly equating the MOR of flange to other applied bending moment. 

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