Girder _top_ -

Girders are classified by their shape, material, and structural purpose. Choosing the right type depends on the span length, load intensity, and site constraints. 1. I-Girders (Plate Girders)

: Often made of steel, these are fabricated by welding or bolting steel plates together. They are favored for their cost-effectiveness and ease of maintenance. girder

These have a hollow, rectangular, or trapezoidal cross-section. They offer superior torsional (twisting) stiffness compared to I-girders, making them ideal for curved bridges or long spans. Girders are classified by their shape, material, and

The most common type, I-girders consist of a vertical web and two horizontal flanges. Girders are classified by their shape