Civil Engineering MCQJE Level Civil Engineering
A plate girder has web plate 1000 mm × 8 mm. The maximum d/tw ratio as per IS 800 before vertical stiffeners are required is:
Steel StructuresSteel StructuresHARD
Choose the correct answer
A
100
B
200ε ≈ 170 for Fe345
C
500
D
50
Correct Answer
B. 200ε ≈ 170 for Fe345
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IS 800 Cl. 8.6.1: Intermediate transverse stiffeners required if d/tw > 200ε (where ε = √(250/fy)). For Fe345: ε = √(250/345) = 0.85. Max d/tw without stiffeners = 200×0.85 = 170. Here d/tw = 1000/8 = 125 < 170, so stiffeners are optional based on this check alone (but also check shear buckling: d/tw > 67ε = 57).
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