The steel truss bridge is a structural system between beams and arches. It is a structure in which a bent upper beam structure and a pressure-bearing lower column are integrated together. Due to the rigid connection between the beam and the column, the beam is unloaded due to the flexural rigidity of the column. The entire system is a compression-bending structure as well as a thrust structure.

According to the position of the bridge floor:

• Upper bearing steel truss bridge - bridge floor located in the upper part of the main truss
• Lower bearing steel truss bridge - bridge floor located in the lower part of the main truss

Key Components:

• Truss Joints: Connections where the truss members intersect
• Vertical Members: Connect the top and bottom chords of the truss
• Truss Members: Primary steel components forming triangular shapes

• Highway and Road Bridges
• Pedestrian Bridges

1. Main girder
2. Bracing
3. Bridge deck system
4. Bridge floor

(1) Main Girder

The main load-bearing structure that bears vertical loads. Composed of:

• Upper chord
• Lower chord
• Belly rod (divided into diagonal bar and vertical bar)

(2) Bracing

Classification:

• Longitudinal connection
• Horizontal connection

Function: Connects the main truss to form a stable space structure capable of withstanding various lateral loads.

(3) Bridge Deck System

Composition:

• Longitudinal beam
• Beam and connection between longitudinal beams

(4) Bridge Deck

The part for vehicles and pedestrians to walk on, similar to steel beam bridges and combined beam bridges.

Triangular Truss:

Simple structure, fixed design, easy to install and manufacture.

Diagonal Bar Truss:

Features many bar specifications and large internal force of the vertical rod.

K-shaped Truss:

Shear force borne by two diagonal rods, suitable for small/medium spans with complex structure or large spans with short rods.

Double-vented Bar Truss:

Shear force borne by two diagonal rods, used for large spans with short compression inclined rods.

Features:

• Truss Configuration
• Versatile Span Lengths
• High Strength-to-Weight Ratio
• Rapid Construction (fabricated off-site)

Advantages:

• Large span capability
• Fast construction speed
• Beautiful appearance
• Strength and durability
• Versatility in span lengths
• Customizable design