Assertion (A): In a plate girder of uniform cross- section, intermediate vertical stiffeners are
provided at closer spacing in the middle rather than at supports.
Reason (R): Intermediate vertical stiffeners are provided to prevent the web from buckling under a complex and variable stress situation resulting from combined action of shear force and bending moment.
• In a plate girder of uniform cross-section where vertical stiffeners are required, they shall
be provided through the length of the girder and be spaced regularly.
• This increases the capacity of the plate girder because of truss like behaviour
• Intermediate vertical stiffeners are provided to prevent the web from buckling due to
combined action of shear force and bending moment.
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