What is Box girder bridges?

Girders are the large section beams above which the slab(deck) rests. They are generally adopted for the bridges. The Box Girder are hollow channel-shaped beams containing two (or more) side webs and two flanges.
The box shape can be either trapezoidal or rectangular. In such girder, one of the flanges remains in compression and the other in tension. The Bridges with such girders are called Box girder bridges.

On basis of the material of construction

• Prestressed concrete Box Girder bridge
• Structural steel Box Girder bridge (generally truss structure along with the metal box)
• Composite steel and Reinforced concrete Box Girder bridge

On basis of shape

• Rectangular Shaped Box Girder bridge
• Two or multiple chamber Box Girder bridge
• Cellular Chamber Box Girder bridge