Box girder bridge
Bridge design
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A box girder bridge, or box section bridge, is a bridge in which the main beams comprise girders in the shape of a hollow box. The box girder normally comprises prestressed concrete, structural steel, or a composite of steel and reinforced... Wikipedia
Design effort: High
Falsework required: Yes, if cast-in-place reinforced or prestressed concrete is used, which is typical for freeway overpasses
Material: Steel, reinforced concrete, prestressed concrete
Span range: Medium