General Information

Figure 1 shows a two-lane road beam bridge.

Beam bridge.
Beam bridge with wall piers over a river
Main span ≅ 20 m
Girder Prestressed concrete beam

Steel Transverse Structure

Figure 2 shows a main span sector viewed from below.

Main span.
Main span of a beam bridge viewed from below

The beams are placed side-by-side. The transverse structure consists mainly of two members (A and B) and two rods (1 and 2); the members are connected to the external beams by the rods, which are tied by bolts. The transverse structure is placed along the spans as shown in figure 3.

Transverse structures layout.
Steel structures layout of a beam bridge
  • What is the purpose of the transverse structure?

    • Figure 4 shows a transverse structure without a rod connection.

    Missing rod connection.
    Prestressed concrete beams with a failed steel structure
  • Does the bridge have a structural safety or serviceability problem without a rod connection?

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