Plate Girders: Learn Different Types, Components and uses!

Last Updated on Jun 30, 2025
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What are Plate Girders?

Plate Girders FAQs

Plate girders are designed in such a way that they can carry load even after buckling due to a phenomenon known as tension field action.

Self-weight of girder is generally adopted as:- For riveted plate girder = W/300 per metre run For welded plate girder = W/400 per metre run Where, W = total factored imposed load.

The cost of fabrication of truss girders is very high. That’s why plate girders are preferred over truss girders.

Plate girders are built-up flexural members. By increasing the distance between the flanges, their bending resistance can be increased. This process also increases the shear-resisting capacity of the plate girders as the web area also increases by this process.

In general, the depth of the plate girder is kept 1/10th to 1/12th of the span.

A plate girder is a robust I-beam section reinforced to withstand heavy loads. It is fabricated by either riveting or welding steel plates in the configuration of an I-beam.

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